ISCO INC
10-K, 1996-10-23
INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-K

(Mark One)
[X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES  EXCHANGE
     ACT OF 1934  [Fee Required]

     For the fiscal year ended July 26, 1996

                                       OR

[ ]  TRANSITION REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES   
     EXCHANGE ACT OF 1934   [No Fee Required]

     For the Transition Period From___________to____________

     Commission File No. 0-14429

                                Isco, Inc
          -----------------------------------------------------
          (Exact name of Registrant as specified in its charter)

             Nebraska                          47-0461807            
     -----------------------        -----------------------------------
     (State of incorporation)       (I.R.S. Employer Identification No.)

      4700 Superior Street, Lincoln, Nebraska                 68504-1398
     ----------------------------------------                 ----------
     (Address of principal executive offices)                 (Zip Code)

Registrant's telephone number, including area code: (402) 464-0231

      Securities registered pursuant to Section 12(b) of the Act:  None
         Securities registered pursuant to Section 12(g) of the Act:

                         Common Stock, $0.10 par value
                         -----------------------------
                               (Title of Class)

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ ]

Indicate by check mark whether Registrant (1) has filed all reports required to
be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the Registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.
                                Yes X     No_____
                                    --
As of September 27, 1996, 5,351,931 shares of Common Stock of Isco, Inc., were
outstanding and the aggregate market value of such Common Stock held by
nonaffiliates was approximately $25,026,000.

                      DOCUMENTS INCORPORATED BY REFERENCE
Proxy Statement for Annual Meeting of Shareholders to be held December 12, 1996
- - Part III.
<PAGE>

                                     PART I
ITEM 1. BUSINESS.

GENERAL

Isco, Inc. was founded as a Nebraska corporation in 1959 under the name
Instrumentation Specialties Company, Inc. The Company designs, manufactures,
and markets worldwide two types of products: its water quality monitoring
products are used by industry and government to monitor compliance with water
quality regulations and its laboratory-scale separation instruments products are
used in a variety of research and testing laboratories and by industry to
monitor product quality. For segment information reference the Notes to the
Financial Statements, and Management's Discussion and Analysis (MD&A).

The Company's founder, Robert W. Allington, has been the controlling
shareholder, chairman of the board, chief executive officer since inception, and
president until October 6, 1995. Douglas M. Grant has been president and chief
operating officer of the Company since October 6, 1995.

The Company's principal offices are located at 4700 Superior Street, Lincoln,
Nebraska 68504-1398, and its telephone number is (402)464-0231. As used herein,
"Company" or "Isco" refers to Isco, Inc., and its subsidiaries, unless the
context otherwise requires.

In September 1993, the Company acquired a minority ownership position in
Geomation, Inc., a privately held company in Golden, Colorado. The Company has
the option to acquire complete ownership of Geomation, Inc. That option is
exercisable during the first quarter of fiscal 1998.

RECENT DEVELOPMENTS

In July 1996 after operating for many years with two divisions, the Company
merged the divisions into one operating unit. Refer to MD&A for additional
information on the restructuring.

Subsequent to the close of fiscal year 1996, the Company acquired substantially
all of the assets and assumed selected liabilities of Suprex Corporation,
Pittsburgh, Pennsylvania. Suprex was a significant producer of supercritical
fluid extraction (SFE) products with a major focus in the food industry. For
example, Frito-Lay, Inc., a leading food producer, makes extensive use of Suprex
SFE products in ensuring high quality foods. By combining the Suprex SFE
products with those of the Company, management believes the Company has achieved
the leading market position in SFE. The Company is integrating Suprex into its
Lincoln, Nebraska operation.

PRODUCTS AND APPLICATIONS

The contribution made by the principal product lines to the Company's net sales
for fiscal 1996, 1995, and 1994, respectively, is as follows:  wastewater
samplers 35, 34, and 37 percent; open channel flowmeters 19, 20, and 18 percent;
and liquid chromatography 14, 12, and 16 percent.


The Company's water quality control customers use wastewater samplers to 
collect water samples from streams and sewers for subsequent analysis in the 
laboratory. Its open channel flow meters are used to measure and 

                                        2
<PAGE>

record the flow rate of liquids in unpressurized pipes and open channels. 
These flow meters can be linked with wastewater samplers to trigger the 
collection of water samples based on flow rate. Also, the combined use of 
these two products is well suited to conduct storm water runoff studies in 
compliance with federal regulations. Cities may use the Company's 
computer-based flow logging systems to determine the state of repair of their 
sewer systems. Other customers use those systems to store flow, rainfall, and 
other sample data for later retrieval, analysis, and reporting.

The Company's liquid chromatography (LC) customers use pumps to deliver solvent
through columns packed with special media to separate a sample, placed on the
column, into its component molecules, detectors to identify and quantify the
component molecules, and fraction collectors to collect the separated component
molecules as they elute from the column. Customers include analytical
laboratories which support the development and manufacture of food, chemical,
and pharmaceutical products as well as those which study disease and basic life
functions.

Other products which management believes will contribute to the Company's future
success include: SFE products, total organic carbon (TOC) analyzers, parameter
monitoring products, syringe pumps, and closed pipe flow meters. SFE is a safe,
cost-effective, and time saving technique used to separate selected chemical
compounds (target analytes) from complex sample matrices. The Company's food,
agriproducts, and plastics producing customers use SFE to assure their products
are maintained at a specified level of quality. TOC measurement is an excellent
overall indicator of water quality, and is becoming a method of choice for
continuous on-line screening for the presence of a variety of organic compounds,
without having to test for each substance individually and without waiting up to
five days for test results. The Company's wastewater treatment customers use
TOC analyzers to monitor continuously the treatment process to ensure that it is
proceeding within established parameters. The Company is an emerging participant
in the parameter measuring market. These parameters include pH, conductivity,
temperature, turbidity, dissolved oxygen, and oxygen reduction potential. The
Company's syringe pumps are used for specialized applications in the petroleum
and chemical industries, for pumping supercritical fluids, and in the analytical
chemistry laboratory where high precision and accuracy are required. The
Company, at the beginning of fiscal 1997, introduced a line of electro-magnetic
closed pipe flow meters which management believes will be a cost-effective
alternative to existing magnetic and other closed pipe flow meters.

The U.S. price range of the Company's individual products is: $1,500 to $17,000
for water quality monitoring instruments and $300 to $10,000 for separation
instruments. The price for a complete SFE system can exceed $60,000.

MARKETING AND SALES

During 1996, the Company's water quality monitoring instruments were sold to
approximately 10,000 accounts, consisting of commercial and industrial
enterprises, municipalities in all 50 states, consulting engineers, testing
laboratories, and governmental organizations. The Company's separation
instruments were sold to approximately 1,800 accounts, consisting of industrial
and commercial enterprises, universities, original equipment manufacturers
(OEMs), and governmental organizations. The number of individual customers
substantially exceeds 


                                        3
<PAGE>

the number of accounts, due to the departmental structure
and funding arrangements used by industries, universities, and government
research centers. 

In the United States, a group of 31 independent manufacturers' representative
organizations handle direct sales and the solicitation of orders for water
quality monitoring instruments. These manufacturers' representatives are
supported by promotional programs, trade show exhibitions, and field assistance
by factory-based application specialists and territory sales managers. A sales
manager and staff manage and support the manufacturers' representative
organizations. Domestic selling activities for separation instruments are
conducted by a sales force consisting of a national sales manager and company
sales representatives located in major domestic market areas. Some independent
manufacturers' representatives, selling a limited number of products, are used
to enhance market coverage. The sales staff is supported with an application
specialist and a staffed applications laboratory, with advertising, product and
applications bulletins, technical literature, and applications seminars.

The Company's international sales constituted 27, 22, and 21 percent of the
Company's sales during fiscal 1996, 1995, and 1994, respectively. Isco, Ltd., a
wholly owned foreign sales corporation, transacts the international sales of the
Company's products. The Company has not been adversely affected by foreign
currency fluctuations because all of its international sales are denominated in
United States Dollars. Products are not stocked outside the United States but
are delivered from the Company's inventory in Lincoln, Nebraska. To aid
international sales, the Company offers wastewater samplers and flow meters in
French, German, and Spanish language versions, with results displayed in metric
units.

Isco's international sales are made primarily by independent dealers operating
in various countries around the world. Isco Instruments (Europe) AG, a wholly
owned subsidiary, manages and promotes the sale of the Company's products
through Isco's independent dealers in Europe and the Middle East. The
independent dealers in the other countries are managed by an export manager
based in Lincoln. The Company has an SFE applications laboratory in the United
Kingdom to support its SFE sales effort in Europe.

CUSTOMERS

In the United States, during fiscal year 1996, commercial and industrial
customers accounted for 49 percent of total water quality monitoring instrument
sales; municipalities for 32 percent; consulting engineers and laboratories for
9 percent; and federal and state governmental organizations for 10 percent. For
the same period, commercial and industrial customers accounted for approximately
61 percent of total separation instruments sales; state, municipal, and
nonprofit institutions, including university and hospital laboratories accounted
for 18 percent; OEMs for 15 percent; and federal government laboratories for 6
percent.

The Company has a broad customer base. Currently no single customer, including
any OEM customer, accounts for more than two percent of its sales.


                                        4
<PAGE>

PRODUCT WARRANTY

Isco warrants its products for one year against defective materials and
workmanship. The Company's warranty claims have not been material in the past.
Further, it is anticipated that the Company's warranty claims will not be
material in the future since it emphasizes quality-based design practices and
manufacturing processes for both its current and new products. The Company
provides after sales factory service for most of the products it sells along
with on-site services in the United States for automated SFE systems and the TOC
product. The Company has an extended warranty program available, which
customers may purchase at the time they purchase a new instrument or while the
instrument is under warranty.

COMPETITION

The Company believes that it has a strong competitive position in the markets
for wastewater samplers and open channel flow meters, and maintains a
competitive position in the LC market. The factors which the Company believes
contribute to its competitive position include: its reputation for quality and
service; technically advanced products that provide cost-effective operation and
unique features; an active research and development program that allows the
Company to maintain technical leadership; a strong position in key markets;
efficient production capabilities; and direct sales and manufacturers'
representatives that provide excellent distribution.

The Company has several competitors manufacturing similar wastewater samplers. 
In the United States, the major competing company is American Sigma, Inc.,
recently acquired by Danaher Corporation. According to various sources, the
Company believes it has approximately 50 percent of the domestic wastewater
sampler market, with American Sigma, Inc., having approximately 45 percent. 
Other domestic competitors are small and offer little significant competition. 
Significant competitors in Europe include:  Montec Holdings Limited, of the
Untied Kingdom and Germany; and Endress + Hauser Instruments, of Switzerland.

There are numerous suppliers in the domestic open channel flow meter market. 
Based upon market information developed from internal and external sources and
analyzed by the Company, management believes the Company, along with Marsh-
McBirney, Inc. and Milltronics, each hold approximately 15 to 20 percent of the
United States open channel flow meter market. American Sigma, Inc. is believed
to hold approximately 10 percent of the domestic market. Additional significant
competitors in Europe include:  Montec Holdings Limited, of the United Kingdom
and Germany; and Endress + Hauser Instruments, of Switzerland.

With respect to LC products, the Company believes it is a major producer of
fraction collectors. The largest competitor for these products is Pharmacia 
Biotech, a Swedish company, whose products are manufactured in several European
countries. Pharmacia Biotech has a greater market share in international
markets. However, for selected instruments sold in the United States, the
Company's market share is comparable to that of Pharmacia Biotech. Other major
competitors are Bio-Rad Laboratories, Inc., and Gilson Medical Electronics,
Inc., an American-based company, with much of its production in France.


                                        5
<PAGE>

RESEARCH AND ENGINEERING

The Company commits significant resources to ongoing research and engineering
activities. The Company's near-term goals are to focus these activities toward
improving, enhancing, and expanding the market share of its existing product
lines. Over the long-term, the Company is seeking new market applications for
its products as well as exploring present and related markets which could
utilize new products developed from the Company's expanding technology base. 
For fiscal years 1996, 1995, and 1994, the Company spent approximately
$4,775,000 or 12 percent of sales, $4,468,000 or 11 percent of sales, and
$4,595,000 or 12 percent of sales, respectively, on research and engineering.

PATENTS AND LICENSES

The Company believes it derives a competitive advantage from its patents. 
Therefore, the Company has a policy of obtaining patents wherever commercially
feasible, as well as vigorously asserting and defending them. Company products
are covered by 61 United States patents, 57 of which are owned by Isco, and four
under which Isco is a licensee. There are also numerous corresponding patents
issued by other countries. The Company-owned patents have been assigned to the
Company with no royalties being paid for their use. The Company currently has
30 patent applications pending at the United States Patent Office.

REGULATION

Management believes it is in compliance with environmental regulations. 
Therefore, no unfavorable impact on competition or earnings is expected. The
Company has no government contracts which are subject to renegotiation of
profits upon contract completion. Although the Company's products are not
subject to significant U.S. government regulation, the markets for many of its
products are regulation driven.

BACKLOG

On September 27, 1996, the Company's order backlog was $3,283,000. A year
earlier, on September 22, 1995, the order backlog was $3,396,000. 

MANUFACTURING AND SOURCES OF SUPPLY

The Company's manufacturing and assembly operations are vertically integrated. 
The Company fabricates most of the metal and plastic components used in its
products and obtains the required raw materials from several sources. Since the
Company is not reliant upon outside suppliers for these types of components, it
is generally able to produce them at a lower cost and maintain a consistently
high level of quality.

The Company's products use a variety of mechanical, electrical, and electronic
components, including microprocessors. Most of these components are available
from several sources. Currently, Isco is not experiencing any shortage of raw
materials or components.

The Company uses computerized production control systems. Based on anticipated
demand, inventory position, and production capacity, these systems determine the
raw material and component requirements, the dates when these materials are
needed, and the dates production must begin in order to complete the products on
time. Through the use of production scheduling techniques, these systems enable
the Company to control both 


                                        6
<PAGE>

labor and inventory costs. These systems enable it
to periodically monitor the production costs of each of its products to assure
that the cost structure remains competitive and is consistent with the Company's
profit objectives.

EMPLOYEES

On September 27, 1996, the Company had 377 employees, worldwide, of whom 191
were engaged in production, 59 in research and engineering, 77 in marketing and
sales, and 50 in administration. None of the Company's employees are
represented by a labor union and the Company has never experienced a work
stoppage.

ITEM 2. PROPERTIES.

The facilities which house the Company's operations are owned and unencumbered.
The buildings at 4700 Superior Street in Lincoln, Nebraska contain approximately
113,000 square feet of space and are located on approximately 30 acres. The
building at 531 Westgate Boulevard in Lincoln, Nebraska contains approximately
156,000 square feet of space and is located on approximately 10 acres. 

These facilities house the corporate, executive and administrative offices along
with its sales, research, engineering, manufacturing, and maintenance
activities. Management plans to expand the Superior Street facility so that all
operations can be consolidated at one location. When the consolidation is
complete, steps will be taken to dispose of the Westgate property.

ITEM 3. LEGAL PROCEEDINGS.

There are no legal proceedings which, in the opinion of outside counsel, would
have a material impact on either the financial condition or operating results of
the Company.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

During the fourth quarter of fiscal 1996, no issues were submitted to a vote of
shareholders.

                                     PART II

ITEM 5. MARKET FOR THE REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDERS
MATTERS.

Common stock data:  On September 27, 1996 -- 5,351,931 shares outstanding and
approximately 380 shareholders of record.

Market: Over-the-counter (NASDAQ/NMS). Symbol: ISKO








                                        7
<PAGE>

Stock price:  The high and low bid prices of the common stock and the cash
dividends paid for each quarter during the last two fiscal years are shown
below:
- -------------------------------------------------------------------------------
                     Common Stock Price Range
                     ----------------------------------      Cash Dividends
                            1996              1995              Per Share
                     ----------------   ---------------      --------------
                       High    Low       High    Low         1996      1995
                     -------   ------   -------  ------      ----      ----
    First quarter    $12 1/4   $10 1/8  $ 9 1/2  $ 8         $.05      $.05
    Second quarter    10 7/8     8        9 3/4    8 1/4      .05       .05
    Third quarter      9 3/4     8       12        9 1/4      .05       .05
    Fourth quarter    13         9       12 1/4    9 7/8      .05       .05
- -------------------------------------------------------------------------------
Dividends:  On August 22, 1996, the Board of Directors declared a quarterly cash
dividend of $.05 per share, payable October 1, 1996 to shareholders of record on
September 13, 1996.

ITEM 6. SELECTED FINANCIAL DATA.
Amounts in thousands except per share data.

- -------------------------------------------------------------------------------
                                                  Fiscal Year
                                 ---------------------------------------------
                                   1996     1995      1994     1993    1992
                                 -------   -------   -------  -------  -------
For the fiscal year:
Net sales                        $39,981   $41,784   $38,706  $37,644  $42,847
Gross margin                      22,191    24,606    22,971   22,490   26,477
Operating income(loss)**            (115)    3,708     3,760    3,255    7,569
Non-operating income               1,462     1,437     1,313    1,183    1,079
Income taxes                         360     1,571     1,594    1,244    2,940
Net earnings                         987     3,574     3,479    3,435    5,708

At fiscal year-end:
Current assets                    21,414    25,292    25,946   23,686   26,463
Working capital                   17,437    22,529    22,836   21,239   22,767
Total assets                      46,704    45,766    43,966   42,225   41,210
Long-term debt                         0         0         0        0        0
Shareholders' equity              42,002    42,002    39,745   38,592   36,082
Average shares 
 outstanding*                      5,353     5,370     5,485    5,488    5,487

Per Share Data:
Net earnings per share*             $.18      $.67      $.63     $.63    $1.04
Cash dividends per 
 share (declared)*                  $.20      $.20      $.19     $.17     $.17
- -------------------------------------------------------------------------------

Fiscal 1993 data includes a one-time increase in net earnings of approximately
$241,000 or $.04 per share from the implementation of SFAS No. 109, "Accounting
for Income Taxes."

* Adjusted for 15 percent stock dividends distributed on September 27, 1991 and
on December 9, 1993.

** Fiscal 1996 includes restructuring charges of $1,752,000 associated with the
consolidation of the divisions.


                                        8
<PAGE>

ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS.

             The following Management's Discussion and Analysis
             of Financial Condition and Results of Operations
             contain trend analysis and other forward-looking
             statements within the meaning of Section 27A of the
             Securities Act of 1933, as amended, and Section 21E
             of the Securities Exchange Act of 1934, as amended. 
             Actual results could differ materially from those
             projected in the forward-looking statements
             throughout this document as a result of the factors
             set forth below in the section entitled "Factors
             Effecting Future Results" and elsewhere in this
             document.

SALES ANALYSIS AND REVIEW

        Net Sales to Unaffiliated Customers by Business Segment
- -------------------------------------------------------------------------------
         (amounts in thousands)
                                                     1996     1995      1994 
                                                   -------  -------   -------
Water Quality Monitoring Instruments               $27,050  $28,739   $26,280
Separation Instruments                              12,931   13,045    12,426
                                                   -------  -------   -------
Total Net Sales                                    $39,981  $41,784   $38,706
                                                   -------  -------   -------
                                                   -------  -------   -------
- -------------------------------------------------------------------------------
1996 to 1995 Comparison

Water Quality Monitoring Instruments. Fiscal 1996 sales of $27,050,000 were six
percent below fiscal 1995 sales. Compared with fiscal 1995, domestic sales were
down 14 percent while international sales of $6,198,000 were up 38 percent. The
decline in domestic sales can be attributed to both the anti-environmental
posture of the Congress and the federal budget debate with the resulting
uncertainty over the funding of EPA programs and enforcement activities. Sales
of wastewater samplers, open channel flowmeters, and parameter monitoring
products were down, while sales of TOC analyzers were up. The segment's order
backlog, at year-end, was $1.7 million, an increase of eight percent from the
beginning of the fiscal year.

Separation Instruments. Fiscal 1996 sales of $12,931,000 were one percent below
fiscal 1995 sales. Compared with fiscal 1995, domestic sales were up four
percent while international sales of $4,465,000 were down nine percent. Sales
of liquid chromatography products were up, syringe pump sales were flat, and
sales of SFE products were down. The segment's order backlog, at year-end, was
$878,000, a decrease of 50 percent from the beginning of the fiscal year. 

1995 to 1994 Comparison

Water Quality Monitoring Instruments. Fiscal 1995 sales of $28,739,000 were 
nine percent above fiscal 1994 sales. Compared with fiscal 1994, domestic 
sales were up nine percent while international sales of $4,485,000 were up 13 
percent. Wastewater sampler sales grew nine percent, reversing  a three-year 
decline. Open channel flow meter sales and leasing revenues showed growth 
which was consistent with that of the segment, while sales of parameter 
products were even with 1994. The segment introduced a TOC analyzer in 
mid-fiscal 1995 in an effort to expand its market base. The TOC analyzer did 
not contribute significantly to revenues during fiscal 1995. The segment's 
order 

                                        9
<PAGE>

backlog, at year-end, was $1.5 million, a decrease of 24 percent from the 
beginning of the fiscal year.

Separation Instruments. Fiscal 1995 sales of $13,045,000 were five percent 
above fiscal 1994 sales. Compared with fiscal 1994, domestic sales declined 
two percent while international sales of $4,887,000 were up 20 percent. SFE 
products and syringe pump sales accounted for nearly 50 percent of the 
segment's 1995 sales. The growth of these two product lines more than offset 
the decline in liquid chromatography products and other traditional products 
of the segment. The segment's order backlog, at year-end, was $1.7 million, a 
decrease of four percent from the beginning of the fiscal year.

OPERATING INCOME ANALYSIS AND REVIEW

                   Operating Income(Loss) by Business Segment
- -------------------------------------------------------------------------------
                    (amounts in thousands)
                                                    1996      1995      1994 
                                                   ------    ------    ------
Water Quality Monitoring Instruments               $1,393    $4,601    $3,581
Separation Instruments                             (1,508)     (893)      179
                                                   ------    ------    ------
Total Operating Income(Loss)                       $ (115)   $3,708    $3,760
                                                   ------    ------    ------
                                                   ------    ------    ------
- -------------------------------------------------------------------------------
1996 to 1995 Comparison

Water Quality Monitoring Instruments. This segment generated operating income of
$1,393,000 during fiscal 1996, a 70 percent decrease from fiscal 1995. During
fiscal 1996 the Company announced the merger of its two divisions and as a
result incurred restructuring charges, which accounted for 27 percent of the
decrease in operating income. The restructuring charges are discussed in a
following section. During fiscal 1996, the gross margin percentage, as a
percentage of sales, declined four percent. Approximately half of the decrease
in the margin is a result of the growth in international sales as a percentage
of total sales. International sales are through dealers who receive discounts
off list prices, whereas, domestic sales are through manufacturers'
representatives who purchase at list prices and are paid commissions. Discounts
are recorded as reductions in sales whereas commissions are recorded as selling
expenses. The remainder of the decrease in the margin is the result of
increased manufacturing costs, mainly from increases in overhead costs. For the
year, research and engineering expenses increased 12 percent, due primarily to
costs incurred relative to the development of a closed pipe flow meter and the
continued development of TOC analyzers. Selling, general, and administrative
(SG&A) expenses remained flat. Decreases in legal fees and the Company's profit
sharing contribution more than offset increases in wages and related benefits,
advertising expenses, and collection expenses. During fiscal 1996, legal
expenses returned to a more normal level from fiscal 1995 when the Company
incurred significant legal expenses defending against a lawsuit brought by Marsh
McBirney, Inc., an open channel flow meter competitor. In fiscal 1995, a
judgment was entered in favor of the Company, however, the plaintiff appealed
the decision. During fiscal 1996, the judgment was sustained by an appellate
court.

Separation Instruments. This segment incurred an operating loss of $1,508,000
during fiscal 1996 compared with a operating loss of $893,000 in fiscal 1995.
During fiscal 1996 the Company announced the merger of 


                                        10
<PAGE>

its two divisions and as a result incurred restructuring charges. If 
restructuring charges had not been incurred, the segment would have improved 
its operating performance by 29 percent when compared with 1995. The 
restructuring charges are discussed in a following section. During 1995, the 
gross margin percentage, as a percentage of sales, declined two percent. The 
margin was negatively affected by the increase in the LIFO reserve, this 
accounted for over half of the decrease in the margin. The remainder of the 
decrease was due to the sales mix shifting back to lower margin liquid 
chromatography products. Research and engineering expenses remained flat, 
while SG&A expenses decreased 10 percent. Reduced expenses to support 
international dealers and domestic manufacturers' representatives, the 
Company's profit sharing contribution, costs associated with equipment on 
loan to potential customers, advertising expenses, and other marketing 
related program expenses accounted for the majority of the decrease in SG&A 
expenses.

1995 to 1994 Comparison

Water Quality Monitoring Instruments. This segment generated operating income
of $4,601,000 during fiscal 1995, a 28 percent increase over fiscal 1994. 
During 1995, the gross margin percentage declined slightly. For the year,
research and engineering expenses declined nine percent due, primarily, to
reduced expenditures for external research and engineering services. During the
year, SG&A expenses increased six percent mainly as a result of the legal
expenses associated in defending against the lawsuit discussed above. 

Separation Instruments. This segment incurred an operating loss of $893,000
during fiscal 1995 compared with a operating profit of $179,000 in fiscal 1994. 
During 1995, the gross margin percentage declined slightly. Increased
expenditures for external research and engineering services, and materials and
supplies represent the majority of the six percent increase in research and
engineering expenses. Increased sales salaries, expenses to support
international dealers and domestic manufacturers' representatives, sales
materials, commissions, sales and marketing travel expenses, and patent expenses
represented the majority of the 25 percent increase in SG&A expenses. The
segment's operating income was reduced as a result of expensive field service
and engineering activities required to correct operational problems of the SFX
3560 automated supercritical fluid extractor. These problems were resolved and
a reliable product delivered to the segment's customers.


RESULTS OF OPERATIONS

The following table summarizes, for the three years indicated, the percentages
which certain components of the Consolidated Statements of Earnings bear to net
sales and the percentage change of such components (based on actual dollars)
compared with the prior year. The year-to-year analysis which follows relates
to the Company-wide elements which cannot be attributed to a particular segment.


                                        11
<PAGE>
- -------------------------------------------------------------------------------
                                                              Year-to-Year
                                                            Increase(Decrease)
                                   Year Ended               ------------------
                             ------------------------        1996        1995
                             Jul 26   Jul 28   Jul 29         vs.        vs.
                              1996     1995     1994         1995        1994
                             ------   ------   ------        ----        ----
Net sales                    100.0    100.0    100.0         (4.3)        8.0
Cost of sales                 44.5     41.1     40.7          3.6         9.2
                             ------   ------   ------
                              55.5     58.9     59.3         (9.8)        7.1
                             ------   ------   ------
Expenses:
 Selling, general, and
  administrative              39.5     39.3     37.8         (4.0)       12.4
 Research and engineering     11.9     10.7     11.9          6.9        (2.8)
 Restructuring charges         4.4      --       --           --          --
                             ------   ------   ------
                              55.8     50.0     49.7          6.7         8.8
                             ------   ------   ------
Operating income(loss)         (.3)     8.9      9.6          --         (1.4)
Non-operating income           3.7      3.4      3.4          1.7         9.4 
                             ------   ------   ------
Earnings before  
 income taxes                  3.4     12.3     13.0        (73.8)        1.4 
Income taxes                    .9      3.8      4.1        (77.1)       (1.4)
                             ------   ------   ------
Net earnings                   2.5      8.5      8.9        (72.4)        2.7 
                             ------   ------   ------
                             ------   ------   ------
- -------------------------------------------------------------------------------

1996 to 1995 Comparison

The Company's fiscal year 1996 effective income tax rate was 26.7  percent
compared with 30.5 percent for the previous year. The decline in the current
year's effective income tax rate was the result of lower taxable income relative
to increased tax-exempt income. The current year's effective income tax rate
was also affected by the Company's decision to cancel its incentive tax contract
with the State of Nebraska requiring the repayment of approximately $89,000 of
non-qualifying tax benefits.

1995 to 1994 Comparison

The Company's fiscal year 1995 effective income tax rate was 30.5 percent
compared with 31.4 percent for the previous year. The decrease was due, to the
combination of increased tax-exempt income relative to operating income and
adjusting for the prior year's estimate of currently payable federal and state
income tax.


RESTRUCTURING CHARGES

On July 15, 1996, the Company announced the merger of its two divisions. 
Management believes that the restructuring will result in improved medium to
longer term financial performance, and ensure the vitality and competitiveness
of the Company. The restructuring resulted in the elimination of approximately
40 positions, many of which were in duplicated management and supervisory
positions. It is expected that these reductions will lower operating and
manufacturing costs by approximately $1.5 to $1.9 million per year. The costs
associated with this restructuring are approximately $1,752,000. Details of the
charges are in Note K of the financial statements. The Company plans to expand
and remodel the Superior Street facility to house all of the Company's
operations that are currently distributed between the Superior and Westgate
facilities. The estimated cost associated with the Superior 


                                        12
<PAGE>

expansion and remodeling will be in the $5.5 to $6.0 million range. The 
expansion and remodeling will be funded from working capital and the 
liquidation of investments. After the expansion is completed the Company 
plans to sell the Westgate facility.

LIQUIDITY AND CAPITAL RESOURCES

The Company continues to have a strong financial position with no debt
obligations. At July 26, 1996, working capital was $17,437,000 and the current
ratio was a healthy 5.4:1. At July 26, 1996, the Company had in place with its
commercial bank an unused, unsecured $3 million line of credit.

Cash flows from operations were $5,324,000 for fiscal year 1996 compared with
$2,205,000 for the previous year. A majority of the improvement in cash flows
was from management's follow through on the commitment to reduce inventory. 
This reduction more than offset the reduction in net income. Additional
benefits provided to cash flows came from increases in accrued expenses and
accounts payable combined with a smaller increase in accounts receivable. 
Accrued expenses are up due to costs associated with the Company's
restructuring.


RECENT DEVELOPMENTS

In a continued effort to expand its share of the SFE market the Company, in
August 1996, acquired substantially all the assets of Suprex Corporation, its
leading competitor. The acquisition required approximately $2,850,000 in cash
and the assumption of approximately $300,000 in trade payables. As a result of
the acquisition, the Company expects an increase in sales of SFE products to the
$5 to $6 million range. The impact on the fiscal 1997 operating income is
expected to be negligible as a result of the additional costs associated with
merging the operations. The Company anticipates that the Suprex operations will
be merged into its Superior Street location facility during the second quarter
of fiscal 1997. Currently, an analysis of the current product offerings is
being performed to determine the appropriate products to provide to the market.

During fiscal 1996, the Company and Geomation, Inc. agreed to delay the
acquisition of Geomation, Inc. for one year, until the first quarter of fiscal
1998. At that time of the agreement the Company loaned Geomation  $500,000. 
Details of the loan are in Note E of the financial statements.

FACTORS AFFECTING FUTURE RESULTS

The factors which management believes may affect the future financial
performance of the Company include, but are not limited to:  investment in
research and engineering activities which lead to improved sales growth,
successful integration of acquisitions into the Company's operations, increased
financial strength of a major competitor, and dealing with external regulatory
influences on the Company's primary markets.

The primary factor which could affect the Company's earnings performance is that
the domestic growth rates in the Company's core areas of wastewater samplers,
open channel flow meters, and liquid chromatography 


                                        13

<PAGE>

are at or slightly above the general economic growth rate. The Company must 
allocate and direct its research and engineering resources into development 
activities which result in products that contribute to profitable sales 
growth. It is the Company's goal to invest approximately 10 percent of net 
sales in research and engineering activities. Management's challenge is to 
direct sufficient research and engineering resources to protect the Company's 
market position in its core product areas, while at the same time investing 
in research and engineering activities which move the Company into new areas 
with the potential to add significant profitable sales. Recent examples of 
moves into new product areas include the development of an on-line TOC 
analyzer and the UniMag closed pipe flow meter.

The Company is actively pursuing expansion through the acquisition of companies
or products lines in related areas. While this has the potential to add to the
Company's sales and income, growth through acquisition carries certain risks. 
For example, for the Company's recent acquisition of Suprex to be successful, in
the short term the Company must achieve reasonable sales levels of Suprex SFE
products while at the same time integrating the Suprex operations into the
Company's operations in Lincoln, Nebraska. In the longer term the Company must
successfully integrate its existing SFE products with those acquired from
Suprex, and build a profitable SFE business. While management believes these
goals can be accomplished, success is not assured.

In the past several years, the management believes that American Sigma, Inc. has
made significant investments in new product development and sales and marketing
activities. In the U.S., this has created a serious challenge to the Company's
leading market position in wastewater samplers and its strong position in open
channel flow meters. The recent acquisition of American Sigma, Inc. by the
Danaher Corporation has provided additional financial and marketing resources to
this competitor. Consolidation is an on-going trend in both the environmental
products market and the analytical instrument market. As a result, the Company
is facing significantly larger competitors who have the financial and
organizational resources to compete aggressively in a world-wide market.

Approximately 65 percent of the Company's sales are from environmental 
products. This is a regulation-driven business which is strongly influenced 
by both the perceived attitude and actions of governmental entities regarding 
the promulgation and the enforcement of environmental regulations. The 
market effects of the regulatory climate are outside of the Company's 
control, and in any given time period, may be either a positive or negative 
factor in the Company's performance. For example, in fiscal 1996 a 
significant percentage of the Company's decline in U.S. sales in the 
environmental products area can be attributed to both the anti-environmental 
posture of the Congress and the federal budget debate with the resulting 
uncertainty over the funding of EPA programs and enforcement activities.

INFLATION

The impact of inflation on the costs of the Company and its ability to pass on
cost increases in the form of increased sale prices is dependent upon market
conditions and its competitive environment. Inflation in the domestic economy
has been relatively low for the past three years and has not had a significant
impact on the Company.


                                        14
<PAGE>
ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

Independent Auditors' Report

Board of Directors and Shareholders
Isco, Inc.

We have audited the accompanying consolidated balance sheets of Isco, Inc. and
subsidiaries as of July 26, 1996 and July 28, 1995, and the related consolidated
statements of earnings, stockholders' equity, and cash flows for each of the
three years in the period ended July 26, 1996. Our audits also included the
financial statement schedule listed in the Index at Item 14.a.2. These
financial statements and the financial statement schedule are the responsibility
of the Company's management. Our responsibility is to express an opinion on the
financial statements and financial statement schedule based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation. 
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such consolidated financial statements present fairly, in all
material respects, the financial position of Isco, Inc. and subsidiaries as of
July 26, 1996 and July 28, 1995, and the results of their operations and their
cash flows for each of the three years in the period ended July 26, 1996 in
conformity with generally accepted accounting principles. Also, in our opinion,
such financial statement schedule, when considered in relation to the basic
consolidated financial statements taken as a whole, presents fairly in all
material respects the information set forth therein.

As discussed in Note A to the consolidated financial statements, the Company
changed its method of accounting for the impairment of long lived assets in
fiscal 1996.


Deloitte & Touche LLP





Lincoln, Nebraska
October 9, 1996


                                        15
<PAGE>
                           ISCO, INC. AND SUBSIDIARIES

                       CONSOLIDATED STATEMENTS OF EARNINGS
                  (amounts in thousands, except per share data)

                                                          Year Ended
                                                  --------------------------
                                                  July 26   July 28  July 29
                                                    1996      1995     1994 
                                                  -------   -------  -------
Net sales                                         $39,981   $41,784  $38,706
Cost of sales                                      17,790    17,178   15,735
                                                  -------   -------  -------
                                                   22,191    24,606   22,971
                                                  -------   -------  -------

Expenses:
  Selling, general, and administrative             15,779    16,430   14,616
  Research and engineering                          4,775     4,468    4,595
  Restructuring charges (Note K)                    1,752        --       --
                                                  -------   -------  -------
                                                   22,306    20,898   19,211
                                                  -------   -------  -------
Operating income(loss)                               (115)    3,708    3,760
                                                  -------   -------  -------

Non-operating income:
  Investment income                                 1,088       938      697
  Other                                               374       499      616
                                                  -------   -------  -------
                                                    1,462     1,437    1,313
                                                  -------   -------  -------

Earnings before income taxes                        1,347     5,145    5,073

Income taxes (Note G)                                 360     1,571    1,594
                                                  -------   -------  -------

Net earnings                                      $   987   $ 3,574  $ 3,479
                                                  -------   -------  -------
                                                  -------   -------  -------

Net earnings per share                               $.18      $.67     $.63
                                                  -------   -------  -------
                                                  -------   -------  -------

Weighted average number of shares
   outstanding                                      5,353     5,370    5,485
                                                  -------   -------  -------
                                                  -------   -------  -------

The accompanying notes are an integral part of the consolidated financial
statements.


                                        16
<PAGE>

                           ISCO, INC. AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEETS
                         (Columnar amounts in thousands)

                                                         July 26    July 28
                                                          1996       1995
                                                         -------    -------
Assets

Current assets:
  Cash and cash equivalents                              $ 4,420    $ 4,063
  Short-term investments (Note B)                          2,749      5,883
  Accounts receivable, trade, net of
    allowance for doubtful accounts
    of $72,027 and $73,859                                 7,131      6,949
  Inventories (Note C)                                     5,343      6,812
  Refundable income taxes (Note G)                            26        472
  Deferred income taxes (Note G)                             776        558
  Other current assets                                       969        555
                                                         -------    -------
      Total current assets                                21,414     25,292

Property, plant, and equipment (Note D)                    7,075      8,337

Long-term investments (Note B)                            16,035     10,487

Other assets (Note E)                                      2,180      1,650
                                                         -------    -------
Total assets                                             $46,704    $45,766
                                                         -------    -------
                                                         -------    -------

Liabilities and Shareholders' Equity

Current liabilities:
  Accounts payable                                       $   862    $   547
  Accrued expenses (Note F)                                2,943      2,197
  Income taxes payable (Note G)                              172         19
                                                         -------    -------
    Total current liabilities                              3,977      2,763
                                                         -------    -------
Deferred income taxes (Note G)                               725      1,001

Shareholders' equity (Note I):
  Preferred stock, $.10 par value, authorized
    5,000,000 shares; issued none
  Common stock, $.10 par value, authorized
    15,000,000 shares; issued 5,978,538 shares               598        598
  Additional paid-in capital                              36,838     36,838
  Retained earnings                                        6,428      6,511
  Net unrealized holding gain(loss) on 
    available-for-sale securities                           (198)      (281)
                                                         -------    -------
                                                          43,666     43,666
  Less treasury stock, at cost, 626,607 shares             1,664      1,664
                                                         -------    -------
    Total shareholders' equity                            42,002     42,002
                                                         -------    -------
Total liabilities and shareholders' equity               $46,704    $45,766
                                                         -------    -------
                                                         -------    -------

The accompanying notes are an integral part of the consolidated financial
statements.


                                        17
<PAGE>

                           ISCO, INC. AND SUBSIDIARIES

                 CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
             (Amounts in thousands, except share and per share data)


<TABLE>
<CAPTION>
                                                                                    Net
                                                                                unrealized
                                                                                  holding
                                                                                 gain(loss)
                                       Common stock      Additional             on available-     Treasury stock
                                   -------------------    paid-in     Retained    for-sale       -----------------
                                     shares     amount    capital     earnings   securities       shares    amount
                                   ---------    ------   ---------    --------   ----------      --------   -------
<S>                                <C>           <C>      <C>         <C>         <C>            <C>        <C>
Balance, July 30, 1993             5,198,729     $520      $26,973     $11,536        $ --        427,615   $ (437)
Net earnings                              --       --           --       3,479          --           --        -- 
Cash dividends ($0.19 per share)          --       --           --      (1,061)         --           --        --
15% stock dividend                   779,809       78        9,865      (9,943)         --         64,142      --
Purchase of stock                         --       --           --        --            --        108,850     (974)
Net unrealized holding gain(loss)
  on available-for-sale 
  securities                              --       --           --        --          (291)          --        --
                                   ---------    ------   ---------    --------   ----------      --------   -------

Balance, July 29, 1994             5,978,538      598       36,838       4,011        (291)       600,607   (1,411)
Net earnings                              --       --           --       3,574          --           --        --
Cash dividends ($0.20 per share)          --       --           --      (1,074)         --           --        --
Purchase of stock                         --       --           --        --            --         26,000     (253)
Net change in net unrealized
  holding gain(loss) on
  available-for-sale securities           --       --           --        --            10           --        --
                                   ---------    ------   ---------    --------   ----------      --------   -------
Balance, July 28, 1995             5,978,538      598       36,838       6,511        (281)       626,607   (1,664)
Net earnings                              --       --           --         987          --           --        --
Cash dividends ($0.20 per share)          --       --           --      (1,070)         --           --
Net change in net unrealized
  holding gain(loss) on
  available-for-sale securities           --       --           --        --            83           --        --
                                   ---------    ------   ---------    --------   ----------      --------   -------

Balance, July 26, 1996             5,978,538     $598      $36,838     $ 6,428       $(198)       626,607  $(1,664)
                                   ---------    ------   ---------    --------   ----------      --------   -------
                                   ---------    ------   ---------    --------   ----------      --------   -------

</TABLE>
The accompanying notes are an integral part of the consolidated financial
statements.


                                        18
<PAGE>

                           ISCO, INC. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                         (columnar amounts in thousands)


                                                            Year Ended
                                                    ---------------------------
                                                   July 26    July 28   July 29
                                                     1996       1995     1994
                                                   --------   -------   -------

Cash flows from operating activities:
  Net earnings                                     $   987   $ 3,574   $ 3,479
  Adjustments to reconcile net earnings to 
    net cash provided by operating activities:
   Depreciation and amortization                     1,931     2,102     1,945
   Deferred income taxes                              (543)       --      (242)
   (Gain)loss on sale of investments                    (6)       (7)      159
   Gain on sale of property, plant, and
    equipment                                         (193)     (147)     (121)
   Provision for doubtful accounts                      81        20        31
   Loss on impairment of assets                        500        --        --
   Change in operating assets and liabilities:
   Accounts receivable, trade-
    (increase) decrease                               (262)     (864)     (469)
   Inventories-(increase) decrease                   1,469    (1,538)     (152)
   Refundable income taxes-(increase) decrease         446      (472)      837
   Other current assets-(increase) decrease           (414)     (128)      153
   Accounts payable-increase (decrease)                316       (65)      277
   Accrued expenses-increase (decrease)                746      (144)      229
   Income taxes payable-increase (decrease)            152      (138)      157
  Other                                                114        12       (16)
                                                   --------   -------   -------
  Total adjustments                                  4,337    (1,369)    2,788
                                                   --------   -------   -------
  Net cash provided by operating activities          5,324     2,205     6,267
                                                   --------   -------   -------

Cash flows from investing activities:
  Proceeds from sale of available-for-sale 
   securities                                           91        11     4,838
  Proceeds from maturity of available-for-
   sale securities                                     105         4        --
  Proceeds from maturity of held-to-maturity
   securities                                        6,261     6,079     8,484
  Proceeds from sale of property, plant, and
   equipment                                           225       178       158
  Purchase of available-for-sale securities         (8,371)     (290)   (3,106)
  Purchase of held-to-maturity securities             (476)   (5,184)  (11,273)
  Purchase of property, plant, and equipment          (940)   (1,125)     (750)
  Investment in Geomation, Inc.                        --        --       (500)
  Disbursement for issuance of note receivable        (500)      --         --
  Other                                               (292)     (171)      (88)
                                                   --------   -------   -------
  Net cash used in investing activities             (3,897)     (498)  $(2,237)
                                                   --------   -------   -------


                                        19
<PAGE>

                           ISCO, INC. AND SUBSIDIARIES

                CONSOLIDATED STATEMENTS OF CASH FLOWS - continued
                         (columnar amounts in thousands)

                                                           Year Ended
                                                  -----------------------------
                                                  July 26    July 28    July 29
                                                   1996       1995       1994
                                                  -------    -------    -------

Cash flows from financing activities:
  Cash dividends paid                              (1,070)   (1,074)    (1,061)
  Purchase of stock                                   --       (253)      (974)
                                                  -------    -------    -------
  Net cash used in financing activities            (1,070)   (1,327)    (2,035)
                                                  -------    -------    -------

Cash and cash equivalents:
  Net increase (decrease)                             357       380       1,995
  Balance at beginning of year                      4,063     3,683       1,688
                                                  -------   --------    -------
  Balance at end of year                          $ 4,420   $ 4,063     $ 3,683
                                                  -------   --------    -------
                                                  -------   --------    -------


See Note L for supplemental cash flow information.


The accompanying notes are an integral part of the consolidated financial
statements.


                                        20
<PAGE>

                           ISCO, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
           Years ended July 26, 1996, July 28, 1995 and July 29, 1994
        (Columnar amounts in thousands, except share and per share data)

Note A. Summary of Significant Accounting Policies.

Description of Business--Isco, Inc. and its subsidiaries(the Company) designs,
manufactures, and markets worldwide two types of products:  water quality
monitoring products and laboratory-scale separation instruments.

Basis of Presentation--The consolidated financial statements include the
accounts of the Company and its wholly-owned subsidiaries. All significant
intercompany transactions and accounts have been eliminated. Investments in
which the Company exercises significant influence over operating and financial
policies are accounted for using the equity method.

For fiscal reporting purposes, the Company operates under a 52/53 week year,
ending on the last Friday of July.

Use of Estimates--The preparation of the financial statements in conformity with
generally accepted accounting principles requires management to make estimates
and assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amount of revenue and expenses during the reporting
period. Actual results could differ from those estimates.

Financial Instruments--The Company's financial instruments, including cash,
receivables, notes receivable, and payables, are a reasonable estimate of fair
value based on the maturity dates and terms of such instruments. Fair values of
investments which are based on quoted market values are disclosed in Note B.

Cash and Cash Equivalents--Cash and cash equivalents include all cash 
balances and highly liquid investments with an original maturity of three 
months or less. 

Investments--The Company classifies investments into three categories accounted
for as follows:

Debt securities that the enterprise has the positive intent and ability to hold
to maturity are classified as held-to-maturity securities and reported at
amortized cost; debt and equity securities that are bought and held principally
for the purpose of selling them in the near term are classified as trading
securities and reported at fair value, with unrealized gains and losses included
in earnings; debt and equity securities not classified as either held-to-
maturity or trading are classified as available-for-sales securities and
reported at fair value, with unrealized gains and losses excluded from earnings
and reported in a separate component of shareholders' equity. The Company held
no trading securities during the periods reported and generally does not trade
securities. Sales of available-for-sale securities are recognized using the
first-in, first-out method.

Inventories--Inventories are valued at the lower of cost or market, principally
on the last-in, first-out (LIFO) basis.


                                        21
<PAGE>

Long-Lived Assets--During fiscal 1996, the Company adopted the provisions of
Statement of Financial Accounting Standards No. 121 (SFAS No. 121) entitled
Accounting for the Impairment of Long-Lived Assets and for Long-Lived Assets to
be Disposed Of. SFAS No. 121 established accounting standards for the
recognition and measurement of the impairment of long-lived assets, certain
identifiable intangibles and goodwill. The provisions of this statement require
that long-lived assets and certain intangibles be reviewed for impairment
whenever events or changes in circumstances indicate that the carrying amount of
an asset may not be recoverable. In such cases, the expected future cash flows
(undiscounted and without interest charges) resulting from the use of the asset
are estimated and an impairment loss recognized if the sum of such cash flows is
less than the carrying amount of the asset. Should such an assessment indicate
that the value of along-lived asset or goodwill be impaired, an impairment loss
is recognized for the difference between the carrying value of the asset and its
estimated fair value. As discussed in Note K, the adoption of this statement
resulted in a pre-tax charge of $500,000.

Property, Plant, and Equipment--Property, plant, and equipment are stated at
historical costs. Depreciation is provided using the straight-line and
declining balance methods over estimated useful asset lives of 10 to 35 years
for buildings and improvements and 3 to 10 years for machinery and equipment.

Other Assets--Intangible assets are amortized on a straight-line basis over
estimated useful lives of 5 to 20 years.

Revenue Recognition--Sales of products and services are recorded based on
shipment of products or performance of services. Revenue from extended warranty
contracts is deferred and recognized on a pro rata basis over the life of the
contracts.

Foreign Currency Translation--The functional currency of the wholly owned Swiss
subsidiary is the United States Dollar. The foreign currency translation gain
or loss has not been material.

Employee Benefits Plan--The Beneficial Employee Trust of Isco (BETI), a
voluntary employees' beneficiary association, is funded by Company and employee
contributions. Certain employee benefits, including the weekly disability and
medical protection plan and group insurance premiums, are paid by the BETI.

Research and Engineering Costs--Research and engineering costs are expensed as
incurred.

Income Taxes--The Company and its foreign sales corporation subsidiary file
consolidated federal and state tax returns. Income taxes are recorded using the
liability method which recognizes the amount of taxes payable or refundable for
the current year and deferred tax liabilities and assets for the future tax
consequences of events that have been recognized in the Company's financial
statements or tax returns.

Net Earnings Per Share--Net earnings per share are based on the weighted average
number of common and common equivalent shares outstanding adjusted for the 15%
stock dividend of December 1, 1993. Dilutive common stock equivalents consist
of shares issuable upon exercise of stock options. Fully diluted net earnings
per share are not presented because they are not materially different from
primary net earnings per share.


                                        22
<PAGE>

Reclassifications--Certain reclassifications have been made to the prior years'
financial statements to conform to the current year's presentation.

Note B. Investments.

As of July 26, 1996:
- -------------------------------------------------------------------------------
                                         Gross       Gross      Fair
                           Amortized  Unrealized  Unrealized   Market  Carrying
                              Cost       Gains      Losses     Value     Value
                           ---------  ----------  ----------  -------  --------
Short-term investments:
  Held-to-maturity
    securities:
  State and municipal
    securities             $   761       $ 2          $ --    $   763   $   761
  Available-for-sale
    securities:
  State and municipal
    securities               1,977        11            --      1,988     1,988
                           ---------  ----------  ----------  -------  --------
Total short-term 
    investments              2,738        13            --      2,751     2,749
                           ---------  ----------  ----------  -------  --------

Long-term investments:
  Held-to-maturity
      securities:
    State and municipal
      securities               750         3           --         753       750
  Available-for-sale
      securities:
    State and municipal
      securities            10,379        26           --      10,405    10,405
    Mutual funds             4,970        --          350       4,620     4,620
    Mortgage-backed 
      securities                28        --            4          24        24
    Preferred stock            236        --           --         236       236
                           ---------  ----------  ----------  -------  --------
Total long-term 
      investments           16,363        29          354      16,038    16,035
                           ---------  ----------  ----------  -------  --------
                           $19,101       $42         $354     $18,789   $18,784
                           ---------  ----------  ----------  -------  --------
                           ---------  ----------  ----------  -------  --------
- -------------------------------------------------------------------------------


                                        23
<PAGE>

As of July 28, 1995:
- -------------------------------------------------------------------------------
                                         Gross       Gross      Fair
                           Amortized  Unrealized  Unrealized   Market  Carrying
                              Cost       Gains      Losses     Value     Value
                           ---------  ----------  ----------  -------  --------
Short-term investments:
  Held-to-maturity
      securities:
    State and municipal
      securities            $ 5,883     $--        $ 14       $ 5,869   $ 5,883
                           ---------  ----------  ----------  -------  --------
Long-term investments:
  Held-to-maturity
      securities:
    State and municipal
      securities              5,976      28          --         6,004     5,976
  Available-for-sale
      securities:
    Mutual funds              4,805      --          454        4,351     4,351
    Mortgage-backed
      securities                 28      --            1           27        27
    Preferred stock             127       6          --           133       133
                           ---------  ----------  ----------  -------  --------
Total long-term
      investments            10,936      34          455       10,515    10,487
                           ---------  ----------  ----------  -------  --------
                            $16,819     $34         $469      $16,384   $16,370
                           ---------  ----------  ----------  -------  --------
                           ---------  ----------  ----------  -------  --------
- -------------------------------------------------------------------------------

The contractual maturities on the held-to-maturity securities range from less
than one year to five years. Expected maturities will differ from contractual
maturities because borrowers may have the right to call or prepay obligations
with or without call or prepayment penalties.

Proceeds from sales of available-for-sale securities during fiscal years 1996
and 1995 were $91,000 and $11,000, respectively. Gross gains of $6,000 and
$11,000, and gross losses of $-0- and $4,000 were recognized in fiscal 1996 and
1995, respectively.

In connection with the adoption of "A Guide to Implementation of Statement 115
on Accounting for Certain Investments in Debt and Equity Securities", the
Company reclassified approximately $6,716,000 of securities from held-to-
maturity to available-for-sale during fiscal 1996.

Note C. Inventories.
- --------------------------------------------------------
                                                          
                                 1996          1995  
- --------------------------------------------------------

Raw materials                   $2,049        $2,843      
Work-in-process                  1,935         2,554      
Finished goods                   1,359         1,415
                                ------        ------
                                $5,343        $6,812    
                                ------        ------
                                ------        ------
- --------------------------------------------------------

Had inventories been valued on the first-in, first-out (FIFO) basis, they would
have been approximately $1,275,000 and $952,000 higher than reported on the 
LIFO basis at July 26, 1996 and July 28, 1995, respectively. 


                                        24
<PAGE>

Note D. Property, Plant, and Equipment.
- -----------------------------------------------------------
                                           1996      1995  
- -----------------------------------------------------------

Land                                      $   762   $   757
Buildings and improvements                  8,364     8,320
Machinery and equipment                    13,086    12,607
Construction-in-progress                      128       104
                                          -------   -------
                                           22,340    21,788
Less accumulated depreciation              15,265    13,451
                                          -------   -------
                                          $ 7,075   $ 8,337
                                          -------   -------
                                          -------   -------
- -----------------------------------------------------------

Note E. Other Assets.
- -----------------------------------------------------------
                                           1996      1995  
- -----------------------------------------------------------

Investment in Geomation, Inc.            $  387    $  501
Note Receivable - Geomation, Inc.           500        --
Cash value of life insurance                 933       868
Intangibles, net of accumulated 
  amortization of $556,854 and $426,096      360       281
                                          -------   -------
                                          $2,180    $1,650
                                          -------   -------
                                          -------   -------
- -----------------------------------------------------------

In September of 1993, the Company acquired, for $500,000, approximately 18 
percent of the outstanding stock of Geomation, Inc., a manufacturer of data 
collection, management, and control systems used in the environmental and 
geotechnical industries. The Company's investment has been recorded using 
the equity method of accounting, because the Company exercises significant 
influence over the operating and financial policies of Geomation, Inc. The 
resulting goodwill of approximately $371,000 is being amortized over a period 
of 20 years. The amortization of goodwill and the Company's share of 
Geomation's  earnings (loss) were approximately $19,000 and ($95,000), 
respectively for fiscal 1996, and $19,000 and $6,000, respectively for fiscal 
1995. During the fiscal year the Company and Geomation, Inc. agreed to delay 
the acquisition of Geomation, Inc. for one year until the first quarter of 
fiscal 1998. At the time of the agreement the Company loaned Geomation, Inc. 
$500,000 at 8.25 percent interest. The loan and interest is payable either on 
the effective date of the acquisition of Geomation, Inc. by Isco, Inc. or on 
September 30, 1997, should Isco, Inc. elect not to acquire Geomation, Inc. 

Note F. Accrued Expenses.
- ----------------------------------------------------------
                                           1996     1995  
- ----------------------------------------------------------

Salaries, wages, and commissions          $  829    $  850
Profit sharing contribution                   97       383
Vacation/personal time                       519       598
Property, payroll, and sales tax             200       154
Restructuring charges                      1,119        --
Other                                        179       212
                                          -------   -------
                                          $2,943    $2,197
                                          -------   -------
                                          -------   -------
- -----------------------------------------------------------


                                        25
<PAGE>

Note G. Income Taxes.

Income tax expense consists of:
- ---------------------------------------------------------------
                                    1996        1995      1994  
- ---------------------------------------------------------------
Federal:
  Current                           $618       $1,346    $1,572
  Deferred                          (468)         --       (210)
State:
  Current                            276          216       256
  Deferred                           (75)         --        (32)
Foreign:
  Current                              9            9         8
                                    -----      ------    ------
                                    $360       $1,571    $1,594
                                    -----      ------    ------
                                    -----      ------    ------
- ---------------------------------------------------------------

The provision for income taxes is reconciled with the amount of income taxes
computed at the federal statutory rate as follows:
- --------------------------------------------------------------
                                     1996       1995      1994  
- --------------------------------------------------------------
Computed "expected" 
  federal tax expense               $ 458      $1,749    $1,725
State income taxes, 
  net of federal tax benefit           71         177       169
Foreign income taxes                    9           9         8
Research and development credits       (7)         (2)      (71)
Exempt foreign sales
  corporation income                  (70)        (70)      (68)
Tax-exempt income                    (292)       (239)     (209)
Prior year federal & state income
  tax adjustments                     166          19         7
Other                                  25         (72)       33
                                    -----      ------    ------
                                    $ 360      $1,571    $1,594
                                    -----      ------    ------
                                    -----      ------    ------
- ---------------------------------------------------------------


                                        26
<PAGE>

The July 26, 1996 and July 28, 1995 components of deferred income tax assets 
and liabilities resulting from temporary differences between financial and tax
reporting are as follows:
- -------------------------------------------------------------------------------
                                                    1996      1995      1994  
- -------------------------------------------------------------------------------
Deferred assets:
  Uniform capitalization of inventory costs       $  381    $  439    $  349
  Securities valuations                              119       168       175
  Vacation/personal time                             139       157       147
  Write-down of inventory                             --        --        72
  Restructuring charges                              334        --        --
  Write-down of property                             189        --        --
  Capital loss carry forward                          38        41        55
  Reserve for doubtful accounts                       27        28        23
  Deferred warranty income                            15        16        15
  Other                                               18        21        18
                                                  ------     -----     -----
  Total deferred assets                            1,260       870       854
                                                  ------     -----     -----

Deferred liabilities:
  Depreciation                                       908     1,017     1,114
  Uniform capitalization of inventory costs           43        64        85
  Prepaid expenses                                   138       163        32
  BETI contribution                                   74        55        44
  Other                                               46        14        15
  Total deferred liabilities                       1,209     1,313     1,290
                                                  ------     -----     -----
Net deferred liabilities(assets)                  $  (51)   $  443    $  436
                                                  ------     -----     -----
                                                  ------     -----     -----
- -------------------------------------------------------------------------------

At July 26, 1996, the Company had a net capital loss carry forward of 
approximately $101,000 which expires in fiscal year 2000.

Note H. Short-term Borrowing.

At July 26, 1996, the Company had available a $3,000,000 unsecured line of
credit which expires December 31, 1996. The Company had no outstanding
borrowings against its line of credit during the fiscal years ended July 26,
1996 and July 28, 1995.

Note I. Stock Option Plans.

In July 1985, the Company adopted the 1985 Stock option Plan (the "Plan"), 
which authorized the future issuance of up to 174,570 shares to officers and 
key employees. During the fiscal year 1995, 7,695 shares, representing the 
options never granted under the matured plan, lapsed. All remaining options 
under a prior plan adopted in 1981 expired in 1994. Under both plans, 
options had to be granted at not less than 100 percent of the fair market 
value of the common stock when granted. The options are exercisable over a 
period not greater than ten years from the date of grant. Generally, options 
become exercisable in ratable annual installments over the option term.


                                        27
<PAGE>

Stock option activity under the Plan was as follows:
- -------------------------------------------------------------------------------
                                               Incentive Stock Options    
                                          -------------------------------
                                           Shares            Option Price 
                                          --------         --------------

Outstanding at July 30, 1993               126,443          $ 9.78 - 13.04
Granted                                     40,000               10.00
Exercised                                       --                 --
Canceled                                    (3,968)               9.78
                                           -------
Outstanding at July 29, 1994               162,475           10.00 - 13.04
Granted                                      4,400               10.13 
Exercised                                       --                 --
Canceled                                    (3,680)              13.04
                                           -------
Outstanding at July 28, 1995               163,195           10.00 - 13.04
Granted                                         --                 --
Exercised                                       --                 --
Canceled                                   (10,005)              13.04 
Outstanding at July 26, 1996               153,190           10.00 - 13.04
                                           -------
                                           -------
- -------------------------------------------------------------------------------

At July 26, 1996, 41,580 shares were exercisable at prices ranging $10.00 -
$13.04

Note J. Retirement Plan.

The Company has a defined contribution retirement plan covering its United
States-based employees satisfying age and service requirements. The Company
makes annual contributions to the plan of approximately 7% of defined pre-tax
earnings. Company contributions to the plan are limited to 15% of aggregate
compensation of the participants. The Company's contributions approximated 
$97,000, $383,000, and $378,000 for the fiscal years 1996, 1995, and 1994,
respectively.

A 401(k) salary reduction feature is incorporated into the retirement plan. 
Under the terms of the plan, an employee may reduce his or her salary by up to
12%. The Company will match the reduction, up to 10%, with a 20% matching
contribution. The combined amount is then contributed to the plan on behalf of
the employee. During fiscal years 1996, 1995, and 1994, the Company made
matching contributions under the 401(k) salary reduction feature of
approximately $148,000, $140,000, and $133,000, respectively.

Note K. Restructuring Charges.

Operating expenses for the year ended July 26, 1996, include a pre-tax charge of
$1,752,000 for the restructuring costs associated with the merger of the
Company's two divisions and are comprised of the following:
                                            1996 
                                           ------
          Workforce reduction costs        $1,165
          Write down of facility              500
          Other restructuring costs            87
                                           ------
                                           $1,752
                                           ------
                                           ------

The restructuring resulted in the elimination of approximately 40 positions. 
The Company provided severance payments and outplacement services for the


                                        28
<PAGE>

terminated employees with costs of approximately $877,000 and $212,000,
respectively. Substantially all of the restructuring charges will be paid in
fiscal 1997.

As a result of the restructuring, one of its operating facilities will be sold. 
As required by SFAS No. 121 the Company wrote down the facility to its estimated
fair value.

Note L. Supplemental Cash Flow Information.

During fiscal years 1996, 1995, and 1994, the Company made income tax payments
of approximately $305,000, $2,184,000, and $842,000, respectively.

Note M. Segment Reporting.

The Company designs, manufactures, and markets two types of technical
instruments. Water quality monitoring instruments include wastewater samplers
and flow measuring devices used by industry and government to monitor compliance
with water quality regulations. Separation instruments are used by research,
testing, analytical, and process laboratories to perform life science research;
to support the development and production of high quality food, chemical, and
pharmaceutical products; and environmental compliance testing.

Identifiable assets are assets used in the operations of each segment. 
Corporate assets consist, primarily, of cash, investments, refundable income
taxes, deferred income taxes, other current assets, and other assets.

Segment information
- -------------------------------------------------------------------------------
                                    Water 
                                   quality      
                                  monitoring     Separation
             1996                instruments     instruments   Consolidated
- ------------------------------   -----------     -----------   ------------

Net sales                          $27,050        $12,931        $39,981
                                   -------        --------       -------
Operating income (loss)            $ 1,393        $(1,508)       $  (115) 
                                   -------        -------
Investment income                                                  1,088
Other                                                                374
                                                                 -------
  Earnings before income taxes                                   $ 1,347
                                                                 -------
Depreciation and amortization      $ 1,141       $   790         $ 1,931
                                   -------       --------        -------
Capital expenditures               $   443       $   497         $   940
                                   -------       --------        -------
Identifiable assets                $11,552       $ 9,768         $21,320
                                   -------       --------        -------
Corporate assets                                                 $25,384
                                                                 -------
  Total assets                                                   $46,704
                                                                 -------
                                                                 -------
- ------------------------------------------------------------------------


                                        29
<PAGE>

Segment information (continued)
- -------------------------------------------------------------------------------
                                    Water 
                                   quality      
                                  monitoring     Separation
             1995                instruments     instruments   Consolidated
- ------------------------------   -----------     -----------   ------------

Net sales                          $28,739        $13,045        $41,784
                                   -------       --------        -------
Operating income (loss)            $ 4,601        $  (893)       $ 3,708
                                   -------       --------
Investment income                                                    938
Other                                                                499
                                                                 -------
  Earnings before income taxes                                   $ 5,145
                                   -------       --------        -------
Depreciation and amortization      $ 1,202        $   900        $ 2,102
                                   -------       --------        -------
Capital expenditures               $   471        $   654        $ 1,125
                                   -------       --------        -------
Identifiable assets                $12,769        $ 9,389        $22,158
                                   -------       --------        -------
Corporate assets                                                 $23,608
                                                                 -------
  Total assets                                                   $45,766
                                                                 -------
                                                                 -------
- -------------------------------------------------------------------------------
                                    Water 
                                   quality      
                                  monitoring     Separation
             1994                instruments     instruments   Consolidated
- ------------------------------   -----------     -----------   ------------
    
Net sales                          $26,280         $12,426       $38,706
                                   -------         -------       -------
Operating income                   $ 3,581         $   179       $ 3,760
                                   -------         -------
Investment income                                                    697
Other                                                                616
                                                                 -------
  Earnings before income taxes                                   $ 5,073
                                                                 -------
Depreciation and amortization      $ 1,069        $   876        $ 1,945
                                   -------        --------       -------
Capital expenditures               $   421        $   329        $   750
                                   -------        --------       -------
Identifiable assets                $12,274        $ 7,633        $19,907
                                   -------        --------       -------
Corporate assets                                                 $24,059
                                                                 -------
  Total assets                                                   $43,966
                                                                 -------
                                                                 -------
- -------------------------------------------------------------------------------

Note N. International sales.
- --------------------------------------------------------------
                                1996       1995         1994   
- --------------------------------------------------------------
Europe                        $ 5,075     $4,327      $3,436
Asia                            3,122      2,822       2,172
North America                   1,238      1,120       1,115
Other                           1,228      1,103       1,332
                              -------     ------      ------
                              $10,663     $9,372      $8,055
                              -------     ------      ------
                              -------     ------      ------
- --------------------------------------------------------------

Note O. Subsequent event.

On August 21, 1996, the Company acquired certain assets and assumed certain
liabilities of Suprex Corporation (Suprex). Suprex was the Company's leading
competitor in the SFE market. For its year ended December 31, 1995, Suprex had
revenues of $4,279,000 and a net loss of $802,000.

The transaction will be accounted for as a purchase. The assets acquired
consist of certain accounts receivable, inventories, equipment and certain


                                        30
<PAGE>

intangible assets which include all customer lists, copyrights, trademarks,
trade names, and patents of Suprex. The $2,850,000 of funding required to
complete the transaction was financed through cash equivalents and proceeds 
from the sale of long-term available-for-sale securities.

















                                        31
<PAGE>

Statements of Earnings by Quarter. (unaudited)
(Columnar amounts in thousands, except per share data)

<TABLE>
<CAPTION>                       First Quarter       Second Quarter       Third Quarter     Fourth Quarter
                              -----------------    ----------------    -----------------   ---------------
                               1996       1995     1996       1995     1996       1995      1996     1995
                              ------     -------   ------    ------    ------    ------    -------   ------
<S>                           <C>        <C>       <C>       <C>       <C>       <C>       <C>       <C>
Net sales                     $9,752     $10,264   $9,940    $10,431   $9,781    $11,451   $10,509   $9,638
Cost of sales                  4,307       3,893    4,467      4,014    4,320      5,020     4,697    4,251
                              ------     -------   ------    ------    ------    ------    -------   ------
                               5,445       6,371    5,473      6,417    5,461      6,431     5,812    5,387
                              ------     -------   ------    ------    ------    ------    -------   ------

Expenses:
  Selling, general and 
    administrative             4,024       3,828    3,856      4,208    3,978      4,492     3,920    3,902
  Research and engineering     1,117       1,125    1,180      1,169    1,130      1,098     1,349    1,076
  Restructuring charges           --          --       --         --       --         --     1,752       --
                              ------     -------   ------    ------    ------    ------    -------   ------
                               5,141       4,953    5,036      5,377    5,108      5,590     7,021    4,978
                              ------     -------   ------    ------    ------    ------    -------   ------

Operating income(loss)           304       1,418      437      1,040      353        841    (1,209)     409

Non-operating income             364         336      368        366      486        441       244      294
                              ------     -------   ------    ------    ------    ------    -------   ------

Earnings(loss) before 
    income taxes                 668       1,754      805      1,406      839      1,282      (965)     703
Income taxes(benefit)            190         605      185        419      251        426      (266)     121
                              ------     -------   ------    ------    ------    ------    -------   ------
Net earnings(loss)            $  478     $ 1,149   $  620    $   987   $  588    $   856   $  (699)  $  582
                              ------     -------   ------    ------    ------    ------    -------   ------
                              ------     -------   ------    ------    ------    ------    -------   ------

Net earnings(loss)
    per share                   $.09        $.21     $.12       $.18     $.11       $.16     $(.13)    $.11
                              ------     -------   ------    ------    ------    ------    -------   ------
                              ------     -------   ------    ------    ------    ------    -------   ------

Weighted average shares 
    outstanding                5,356       5,378    5,352      5,378    5,352      5,370     5,354    5,355
                              ------     -------   ------    ------    ------    ------    -------   ------

Quarterly per share amounts may not add to annual total due to rounding.
</TABLE>

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
FINANCIAL DISCLOSURE.

None.


                                        32
<PAGE>

                                    PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.

Incorporated by reference from the Isco, Inc., Proxy Statement for Annual
Meeting of Shareholders to be held December 12, 1996, under the captions
ELECTION OF DIRECTORS, LIST OF CURRENT EXECUTIVE OFFICERS OF THE COMPANY, and
ADDITIONAL INFORMATION - Compliance with Section 16(a) of the Securities
Exchange Act of 1934.

ITEM 11. EXECUTIVE COMPENSATION.

Incorporated by reference from the Isco, Inc., Proxy Statement for Annual
Meeting of Shareholders to be held December 12, 1996, under the caption
EXECUTIVE COMPENSATION.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.

Incorporated by reference from the Isco, Inc., Proxy Statement for Annual
Meeting of Shareholders to be held December 12, 1996, under the captions 
GENERAL and ELECTION OF DIRECTORS.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.

None.

                                     PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K.

                                                                          page 
a.  The following documents are filed as a part of this report:         number

     1. Financial Statements:

           Independent Auditors' Report                                      15
           Consolidated Statements of Earnings for fiscal years
            ended July 26, 1996, July 28, 1995, and July 29, 1994            16
           Consolidated Balance Sheets at July 26, 1996 and July 28, 1995    17
           Consolidated Statements of Shareholders' Equity
            for fiscal years ended July 26, 1996, July 28, 1995,
            and July 29, 1994                                                18
           Consolidated Statements of Cash Flows for fiscal years 
            ended July 26, 1996, July 28, 1995, and July 29, 1994            19
           Notes to Consolidated Financial Statements                        21

        Financial statements of the Registrant's subsidiaries are
        omitted because the Registrant is, primarily, an operating
        company and the subsidiaries are wholly-owned.

     2. Schedules:

        Valuation and Qualifying Accounts - Schedule II                      36

        Schedules other than those listed above are omitted for the
        reason that they are not required or are not applicable or
        the required information is shown in the financial statements
        or notes thereto.


                                        33
<PAGE>

Item 14. Exhibits, Financial Statement Schedules, and Reports on Form 8-K.
(continued)
                                                                          page 
                                                                         number

b.  Reports on Form 8-K filed for the three months ended July 26, 1996:

      1. None
                
c. Exhibits (Numbered in accordance with Item 601 of Regulation S-K):

      (3)   (i)     Articles of Incorporation as amended and restated
               through July 26, 1985 [Incorporated by reference
               to Exhibit 3.1 to the Registration Statement on
               Form S-1, File No. 2-99303 (the "Form S-1")]                   -

           (ii)     By-laws as amended through September 21, 1995
               (Incorporated by reference to Annual Report on
               Form 10-K for Isco, Inc. dated July 28, 1995)                  -

     (10) Material contracts: 

          (iii)     (a) 1985 Incentive Stock Option Plan (Incorporated
                   by reference to Exhibit 10.1 (ii) of the
                   Form S-1)                                                  -

               (b) Directors' Deferred Compensation Plan (Incorporated
                   by reference to Registration Statement of Form S-8,
                   File No. 333-00421)                                        -

     (11) Computation of Net Earnings Per Share                              36

     (21) Registrant owns 100 percent of the outstanding capital
          stock of Isco Instruments (Europe) AG, a Swiss corporation.        -

          Registrant owns 100 percent of the outstanding capital
          stock of Isco, Ltd.,a Barbados corporation,(incorporated
          August 3, 1992).                                                   -

     (23) Independent Auditors' Consent                                      37

     (27) Financial Data Schedule                                            38

     (99) Plan Year 1996 Financial Statements of the Isco, Inc. 
          Retirement Plu$ Plan                                               39


                                        34
<PAGE>

                                   SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange
Act of 1934, the Registrant has duly caused this report to be signed on its
behalf by the undersigned, thereunto duly authorized.

ISCO, INC.


By: /s/Robert W. Allington                 By: /s/Philip M. Wittig 
    ______________________________             _______________________________
       Robert W. Allington,                       Philip M. Wittig, Treasurer,
       Chief Executive Officer,                   Chief Financial Officer,
       and Director                               and Director

Date: October 23, 1996                     Date: October 23, 1996


By: /s/Douglas M. Grant                    By: /s/Vicki L. Benne
    ______________________________             _______________________________
       Douglas M. Grant, President,               Vicki L. Benne, Controller
       Chief Operating Officer, 
       and Director

Date:   October 23, 1996                   Date: October 23, 1996


Pursuant to the requirements of the Securities Exchange Act of 1934, this 
report has been signed below by the following persons on behalf of the 
Registrant and in the capacities and on the dates indicated.


By: /s/Dale L. Young                       By:                             
    ______________________________             _______________________________
       Dale L. Young, Secretary                   James L. Linderholm,
       and Director                               Director

Date: October 23, 1996                         Date: October   , 1996


By:                                        By: /s/Harris Wagenseil
    ______________________________             _______________________________
       Robert B. Harris,                          Harris Wagenseil,
       Director                                   Director


Date:   October   , 1996                       Date: October 23, 1996


                                        35
<PAGE>
<TABLE>
<CAPTION>
                 VALUATION AND QUALIFYING ACCOUNTS - SCHEDULE II
                             (Amounts in thousands)


                                                                        Balance
                                    Balance at  Charged to                 at
                                    beginning    cost and     Amounts    end of
                                    of period    expenses   written-off  period 
                                    ---------   ----------  -----------  -------
<S>                                 <C>         <C>         <C>          <C>
Allowance for doubtful accounts:
Year ended July 26, 1996               $74         $81         $83         $72
Year ended July 28, 1995                62          20           8          74
Year ended July 29, 1994                57          31          26          62

</TABLE>



































                                        36

<PAGE>

               COMPUTATION OF NET EARNINGS PER SHARE - EXHIBIT 11
              (Amount in thousands except share and per share data)
                                                                            
                                                       Year Ended
                                         --------------------------------------
                                          July 26        July 28       July 29
                                            1996           1995          1994
                                         ---------      ---------     ---------

Primary:
     Average number of shares of 
          common stock outstanding       5,351,931      5,369,216     5,484,278
     Additional shares assuming
          exercise of dilutive 
          stock options                        721            973           916
                                         ---------      ---------     ---------
               Total                     5,352,652      5,370,189     5,485,194
                                         ---------      ---------     ---------
                                         ---------      ---------     ---------

               Net earnings                   $987         $3,574        $3,479
                                              ----         ------        ------
                                              ----         ------        ------

               Per share amount              $0.18          $0.67         $0.63
                                             -----          -----         -----
                                             -----          -----         -----

Fully Diluted:
     Average number of shares of
          common stock outstanding       5,351,931      5,369,216     5,484,278
     Additional shares assuming
          exercise of dilutive 
          stock options                      1,734          3,728           927
                                         ---------      ---------     ---------
               Total                     5,353,665      5,372,944     5,485,205
                                         ---------      ---------     ---------
                                         ---------      ---------     ---------

               Net earnings                   $987         $3,574        $3,479
                                              ----         ------        ------
                                              ----         ------        ------

               Per share amount              $0.18          $0.67         $0.63
                                             -----          -----         -----
                                             -----          -----         -----




                                        36

<PAGE>

                                   EXHIBIT 23



                          INDEPENDENT AUDITORS' CONSENT

 




We consent to the incorporation by reference in Registration Statement Numbers
33-4190, 33-41201, and 333-00421 of Isco, Inc. and subsidiaries on Form S-8 of
our report dated October 9, 1996 (which report expresses an unqualified opinion
and includes an explanatory paragraph referring to Isco, Inc.'s change in its
method of accounting for impairment of long-lived assets in fiscal 1996,)
appearing in the Annual Report on Form 10-K of Isco, Inc. and subsidiaries for
the year ended July 26, 1996.


Deloitte & Touche LLP





Lincoln, Nebraska
October 9, 1996



<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AND STATEMENT OF EARNINGS FOR JULY 26, 1996 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          JUL-26-1996
<PERIOD-START>                             JUL-29-1995
<PERIOD-END>                               JUL-26-1996
<CASH>                                           4,420
<SECURITIES>                                     2,749
<RECEIVABLES>                                    7,203
<ALLOWANCES>                                        72
<INVENTORY>                                      5,343
<CURRENT-ASSETS>                                21,414
<PP&E>                                          22,340
<DEPRECIATION>                                  15,265
<TOTAL-ASSETS>                                  46,704
<CURRENT-LIABILITIES>                            3,977
<BONDS>                                              0
                                0
                                          0
<COMMON>                                           598
<OTHER-SE>                                      41,404
<TOTAL-LIABILITY-AND-EQUITY>                    46,704
<SALES>                                         39,981
<TOTAL-REVENUES>                                39,981
<CGS>                                           17,790
<TOTAL-COSTS>                                   17,790
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                  1,347
<INCOME-TAX>                                       360
<INCOME-CONTINUING>                                987
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       987
<EPS-PRIMARY>                                      .18
<EPS-DILUTED>                                      .18
        

</TABLE>

<PAGE>






                     ISCO, INC. RETIREMENT PLU$ PLAN

                   Financial Statements And Supplemental

                      Schedules For The Years Ended

                          July 31, 1996 And 1995

                     And Independent Auditors' Report


                                      39

<PAGE>

                         ISCO, INC. RETIREMENT PLU$ PLAN

                 FINANCIAL STATEMENTS AND SUPPLEMENTAL SCHEDULES
                        AND INDEPENDENT AUDITORS' REPORT


                                TABLE OF CONTENTS

                                                                            Page


FINANCIAL STATEMENTS:

  Independent Auditors' Report                                                41

  Statements of Net Assets Available for Benefits                             42

  Statements of Changes in Net Assets Available for Benefits                  43

  Notes to Financial Statements                                               44



SUPPLEMENTAL SCHEDULES:

  Item 27a - Schedule of Assets Held for Investment 
     Purposes - July 31, 1996                                                 50

  Item 27d - Schedule of Reportable Transactions - 
     Year Ended July 31, 1996                                                 51


  Schedules not filed herein are omitted because of 
  the absence of the conditions under which they are 
  required.

                                      40

<PAGE>

                          INDEPENDENT AUDITORS' REPORT
Plan Committee
Isco, Inc. Retirement Plu$ Plan
Lincoln, Nebraska

We have audited the accompanying statements of net assets available for benefits
of the Isco, Inc. Retirement Plu$ Plan as of July 31, 1996 and 1995 and the
related statements of changes in net assets available for benefits for the years
then ended.  These financial statements are the responsibility of the Plan's
management.  Our responsibility is to express an opinion on the financial
statements based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit also includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements.  An audit
also includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation.  We believe that our audits provide a reasonable basis for our
opinion.

In our opinion, such financial statements present fairly, in all material
respects, the net assets available for benefits of the Isco, Inc. Retirement
Plu$ Plan as of July 31, 1996 and 1995, and the changes in net assets available
for benefits for the years then ended, in conformity with generally accepted
accounting principles.

Our audits were conducted for the purpose of forming an opinion on the basic
financial statements taken as a whole.  The supplemental schedules of (1) assets
held for investment purposes as of July 31, 1996, and (2) reportable
transactions for the year ended July 31, 1996, are presented for the purpose of
additional analysis and are not a required part of the basic financial
statements, but are supplementary information required by the Department of
Labor's Rules and Regulations for Reporting and Disclosure under the Employee
Retirement Income Security Act of 1974.  The supplemental information by fund in
the statements of net assets available for benefits and the statements of
changes in net assets available for benefits is presented for the purpose of
additional analysis rather than to present the net assets available for benefits
and changes in net assets available for benefits of the individual funds.  The 
supplemental schedules and supplemental information by fund is the
responsibility of the Plan's management. Such supplemental schedules and
supplemental information by fund have been subjected to the auditing procedures
applied in our audit of the basic 1996 financial statements and, in our opinion,
are fairly stated in all material respects when considered in relation to the
basic financial statements taken as a whole.

Deloitte & Touche LLP

Lincoln, Nebraska 

October 9, 1996

                                      41


<PAGE>

                         ISCO, INC. RETIREMENT PLU$ PLAN
                 STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
                             (amounts in thousands)


<TABLE>
<CAPTION>
                                   July 31, 1996                       July 31, 1995          
                         --------------------------------    -------------------------------
                         Supplemental Information            Supplemental Information
                                 by Fund                             by Fund        
                         ------------------------            -----------------------
                         Employer    Participant             Employer    Participant
                         Directed     Directed      Total    Directed     Directed     Total 
                         --------    -----------   -------   --------    -----------  -------
<S>                      <C>         <C>           <C>       <C>         <C>           <C>
Investments, at fair
    value as deter-
    mined by quoted
    market prices
    (Note C):
  Money market funds       $271       $ 1,687      $ 1,958     $  --       $   --     $   --
  Mutual funds               --        12,706       12,706       226        13,388     13,614
  Isco, Inc. common
    stock fund               --           643          643        --           741        741
Investments, at 
    estimated fair
    value:
  Other investments          88            --           88       117           --         117
                           ----       -------      -------     -----       -------    -------
                            359        15,036       15,395       343        14,129     14,472

Participant loans            --           513          513        --           442        442
                           ----       -------      -------     -----       -------    -------

  Total investments         359        15,549       15,908       343        14,571     14,914

Employer contributions
    receivable               --            97           97        --           383        383
Accrued income                1            --            1         6           --           6
                           ----       -------      -------     -----       -------    -------

  Net assets available 
    for benefits           $360       $15,646      $16,006      $349       $14,954    $15,303
                           ----       -------      -------     -----       -------    -------
                           ----       -------      -------     -----       -------    -------
</TABLE>


The accompanying notes are an integral part of the financial statements

                                      42


<PAGE>

                    ISCO, INC. RETIREMENT PLU$ PLAN
     STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
                        (amounts in thousands)


<TABLE>
<CAPTION>
                                                               July 31, 1996                         July 31, 1995          
                                                     --------------------------------      --------------------------------
                                                     Supplemental Information              Supplemental Information
                                                             by Fund                               by Fund        
                                                     ----------------------                -----------------------
                                                     Employer   Participant                Employer    Participant
                                                     Directed    Directed      Total       Directed     Directed     Total 
                                                     --------   -----------   -------      --------    -----------  -------
<S>                                                  <C>        <C>           <C>          <C>         <C>          <C>
Investment income (Note C and G):
   Dividends, interest, and other income               $ 34       $ 1,168     $ 1,202        $   26       $   719   $   745
   Net realized and unrealized 
     appreciation(depreciation) in fair
     value of investments                                (4)         (520)       (524)          --          1,509     1,509
                                                       ----       -------     -------        ------       -------   -------
Net investment income                                    30           648         678            26         2,228     2,254
                                                       ----       -------     -------        ------       -------   -------

Contributions:
   Employer annual profit sharing                        --            97          97           --            383       383
   Employer 401(k) matching                              --           148         148           --            140       140
   Participant                                           --           774         774           --            730       730
                                                       ----       -------     -------        ------       -------   -------
                                                         --         1,019       1,019           --          1,253     1,253
                                                       ----       -------     -------        ------       -------   -------
   Total additions                                       30         1,667       1,697            26         3,481     3,507

Benefits paid                                           (19)         (975)       (994)          (15)         (472)     (487)
Transfers                                                --            --          --          (804)          804       -- 
                                                       ----       -------     -------        ------       -------   -------
   Increase (decrease)in net assets
     available for benefits                              11           692         703          (793)        3,813     3,020

Net assets available for benefits:
   Beginning of year                                    349        14,954      15,303         1,142        11,141    12,283
                                                       ----       -------     -------        ------       -------   -------

   End of year                                         $360       $15,646     $16,006        $  349       $14,954   $15,303
                                                       ----       -------     -------        ------       -------   -------
                                                       ----       -------     -------        ------       -------   -------
</TABLE>


The accompanying notes are an integral part of the financial statements

                                      43


<PAGE>

                      ISCO, INC. RETIREMENT PLU$ PLAN
                       NOTES TO FINANCIAL STATEMENTS
                    Years ended July 31, 1996 and 1995
             (Columnar amounts in thousands, except share data)


A. DESCRIPTION OF PLAN

General - The following brief description of the Isco, Inc. Retirement
Plu$ Plan (the Plan) is provided for general information purposes only. 
Participants should refer to the Plan document for more complete
information.  The Plan was established effective August 1, 1972 to
provide retirement benefits for the employees of Isco, Inc. (the
Company).  The Plan was last amended effective August 1, 1995.  Effective
August 1, 1987, a 401(k) salary reduction option was incorporated into
the Plan.  Employees are eligible for participation after they have
completed one year of service and are at least 21 years of age.  A year
of service is defined as the accumulation of 1,000 hours of credited
service during a one-year period beginning on the employment date.

Participant contributions, employer 401(k) matching contributions, and
employer annual profit sharing contributions, are invested at Twentieth
Century Investors under the direction of the plan participants.

Funding - Contributions to the Plan are provided from the following
sources:

Employer Annual Profit Sharing Contribution (Participant Directed) - The
Employer is required to contribute an amount equal to the lesser of 7% of
the current net profit of the Company or the maximum amount allowed by
the Internal Revenue Code.  The contributed amount received by each
participant is based on their percentage of total eligible compensation.

Participant Contributions (Participant Directed) - Plan participants may
elect to reduce their compensation by a maximum of 12%, subject to IRS
limitations.  The Employer then contributes the amount of reduction in
compensation to the Plan on behalf of each participant.

Employer 401(k) Matching Contribution (Participant Directed) - The
Employer is required to match 20% of the contribution made on behalf of
each participant electing salary reductions up to a maximum of 10% of the
participant's eligible compensation.

Participant Accounts - Each participant's account is credited with the
participant's contribution, the Company's matching contribution and the
allocated portion of: the Company's annual contribution, and the
forfeited portion of terminated participants' non-vested accounts.  Any
401(k) forfeitures are allocated, based on a participant's contributions
to the 401(k) plan during the year.  The Company's annual contribution
and forfeitures are allocated to each participant's account based on the
percentage of the participant's eligible compensation for the plan year
to the total compensation of all eligible participants for the plan year. 
Earnings are credited directly to each investment option in which the
participant had an investment on the record date of the dividend or
interest distribution.

                                      44


<PAGE>

Vesting - Participant contributions (i.e. employee salary reduction
amounts) and participant rollover contributions are immediately fully
vested and nonforfeitable.  Employer profit sharing contributions and the
Employer 401(k) matching contributions vest 20% upon completion of three
years of credited service, increasing 20% per year until fully vested
upon completion of seven years of credited service.

Plan participants are eligible for normal retirement at age 65 but may
elect to retire at a later date.  Upon attainment of 65 years of age,
death, or determination of disability, a participant becomes 100% vested
regardless of the number of credited years of service completed.

Plan Expenses - As an additional benefit to the participants, the
Employer, without reimbursement, pays for all costs required to
administer the Plan.  These costs are not reflected in the financial
statements.


B.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Valuation of Investments - Investments are stated at fair value.  Fair
value of marketable securities is determined by reference to the closing
quoted price by the exchange on which the security is listed or the
closing net asset value as reported by the mutual fund.  Participant
loans are stated at their outstanding principal balance.  The amounts
shown in Note C for securities that do not have a quoted market price
represent fair value estimated by an independent third party.

Investment transactions are recognized on a settlement date basis.  The
net realized and unrealized appreciation (depreciation) of investments is
recognized in the statements of changes in net assets available for
benefits.  The fair value at the beginning of the plan year, or the
purchased cost if acquired during the year, is used in determining
realized and unrealized gains and losses on the sale of each investment.

Employer Directed - Employer directed funds are invested in the
Restricted Fund, which is managed by the employer.  Assets in the
Restricted Fund at July 31, 1996 include:  Balcor Pension Investors II
and III,  Bankers Trust Stable Value Government Trust, and Chase
Manhattan Bank Pooled Investment.  Transfers from the Restricted Fund to
the Unrestricted Fund are directed by the Plan Committee. 

Participant Directed - Participant directed contributions may be invested
in one or more of seven funds.  A summary description of each investment
alternative follows:

Bankers Trust Stable Value Government Trust Fund - A fund which seeks to
provide current income while maintaining a stable share price.  It is
managed by Bankers Trust Company Investment Management Group.

Twentieth Century Premium Managed Bond Fund - A fund which seeks a high
level of income from a portfolio of longer-term bonds and other debt
obligations.  The fund pays a reduced management fee.

Twentieth Century Balanced Investors Fund - A fund which seeks capital
growth and current income by investing in equity securities with
prospects for growth and in investment grade bonds and other fixed income
securities.

                                      45

<PAGE>


Twentieth Century Select Investors Fund - A fund comprised primarily of
income-producing equity securities of larger companies possessing
potential for appreciation.

Twentieth Century Ultra Investors Fund - A fund comprised primarily of
equity securities of medium and smaller companies with the potential for
appreciation.

Twentieth Century International Equity Fund - A fund which seeks capital
growth by investing primarily in an internationally diversified portfolio
of common stocks.

Isco, Inc. Common Stock Fund - A fund invested primarily in Isco, Inc.
common stock.  Isco, Inc. is a related party and sponsor of the Plan.

Benefits Payable - The Plan's policy is to record benefit payments upon
distribution to the participants.  Benefits payable to retired and
terminated participants were $830,203 and $34,039 at July 31, 1996 and
1995, respectively.

Contributions - Employer profit sharing contributions are computed as of
the end of the Employer's fiscal year and are recorded by the Plan in the
corresponding period, but allocated to participants' accounts in the plan
quarter in which the profit sharing contribution is made to the Plan. 
Participant contributions are recorded in the period in which the bi-
weekly payroll deductions are made.  The Employer 401(k) matching
contributions are also recorded in the period that the payroll deductions
are made.






                                      46


<PAGE>

C. INVESTMENTS

The following schedule presents the fair values of investments.

                                  July 31, 1996
- ------------------------------------------------------------------------
                                                     Number of
                                                      Shares/     Fair
                                                       Units      Value 
                                                     ---------   -------
Investments at fair value as determined 
    by quoted market price:
 Money Market:
  Bankers Trust Stable Value Government Trust Fund   1,945,541   $ 1,946
  Chase Manahattan Bank Pooled Investment               12,036        12


 Mutual Funds:
  Twentieth Century - International Equity Fund        129,942     1,034
  Twentieth Century - Ultra Investors Fund             118,544     3,066
  Twentieth Century - Select Investors Fund            139,150     5,066
  Twentieth Century - Balanced Investors Fund          155,797     2,649
  Twentieth Century - Premium Managed Bond Fund         91,224       891

 Other Investments:
  Isco, Inc. Common Stock Fund                          66,354       643

Investments at estimated fair value:
 Balcor Pension Investors II                               101        43
 Balcor Pension Investors III                              202        45
                                                                 -------
    Total Investments at Fair Value                              $15,395
                                                                 -------
                                                                 -------

                                  July 31, 1995
- ------------------------------------------------------------------------
                                                     Number of
                                                      Shares/     Fair
                                                       Units      Value 
                                                     ---------   -------
Investments at fair value as determined 
    by quoted market price:
 Money Market:
  Bankers Trust Stable Value Government Trust Fund   1,577,744   $ 1,578

 Mutual Funds:
  Twentieth Century - International Equity Fund        148,010     1,109
  Twentieth Century - Ultra Investors Fund             101,631     2,701
  Twentieth Century - Select Investors Fund            119,573     4,772
  Twentieth Century - Balanced Investors Fund          148,411     2,594
  Twentieth Century - Premium Managed Bond Fund         87,278       860

 Other Investments:
  Isco, Inc. Common Stock Fund                          69,472       741

Investments at estimated fair value:
 Balcor Pension Investors II                               101        47
 Balcor Pension Investors III                              202        70
                                                                 -------
    Total Investments at Fair Value                              $14,472
                                                                 -------
                                                                 -------


                                      47

<PAGE>


C. INVESTMENTS (continued)

During the years ended July 31, 1996 and 1995, the Plan's investments
appreciated(depreciated) by $(523,908) and $1,509,435 respectively, as
follows:

Net Realized and Unrealized Appreciation (Depreciation) in Fair Value

                                                    Year Ended July 31,
                                                    -------------------
                                                       1996      1995 
                                                      ------    ------
Investments at fair value as determined by
     quoted market price:
  Mutual Funds:
    Twentieth Century - International Equity Fund     $  61     $    6
    Twentieth Century - Ultra Investors Fund            (42)       682
    Twentieth Century - Select Investors Fund          (406)       402
    Twentieth Century - Balanced Investors Fund         (70)       294
    Twentieth Century - Premium Managed Bond Fund        (8)        30

  Other Investments:
    Isco, Inc. Common Stock Fund                        (55)        97

Investments at estimated fair value:
  Other                                                  (4)        (2)
                                                      -----     ------
                                                      $(524)    $1,509
                                                      -----     ------
                                                      -----     ------
D. PLAN TERMINATION

Although the Company has not expressed any intent to terminate the Plan,
it may do so at any time by giving 30 days notice to the Plan Committee,
the Plan Administrator, and the Trustee.  In the event of such
termination, Plan assets would be valued and participants' accounts would
be adjusted to reflect the allocation of net gains and losses of the
underlying investments.  At that time, participants' accounts would
become fully vested and nonforfeitable.

E. FEDERAL INCOME TAX STATUS

The Plan has received a determination letter from the Internal Revenue
Service dated September 7, 1995, which states that the Plan, as amended
June 17, 1994, meets the requirements of Section 401(a) of the Internal
Revenue Code and is, therefore, exempt from Federal income tax under
Section 501(a) of the Code.  The Plan administrator believes that the
Plan is in compliance with current regulations.  Therefore, no provision
for income taxes is provided in the financial statements of the Plan.

Plan income, participant pretax contributions, and employer contributions
represent taxable income to the participating employees at the time of
distribution.


                                      48

<PAGE>


F. FUND INFORMATION

Participant contributions, benefit payments, and dividends, interest and
other income by fund are as follows for the years ended July 31, 1996 and
1995.


                                         1996     1995
                                        ------    ----

Participant contributions:
   Stable Value Government Trust        $   68    $ 65
   International Equity Fund                87      89
   Ultra Investors Fund                    235     198
   Select Investors Fund                   206     205
   Balanced Investors Fund                 106     100
   Premium Managed Bond Fund                30      30
   Isco, Inc. Common Stock Fund             42      43
                                        ------    ----

          Total                         $  774    $730
                                        ------    ----
                                        ------    ----


Benefits paid:
   Stable Value Government Trust        $  128    $  7
   International Equity Fund                53      22
   Ultra Investors Fund                    247      49
   Select Investors Fund                   237     156
   Balanced Investors Fund                 243     151
   Premium Managed Bond Fund                21      50
   Isco, Inc. Common Stock Fund             19      26
   Participant loans                        27      11
                                        ------    ----

          Total                         $  975    $472
                                        ------    ----
                                        ------    ----


Dividends, interest, and other income:
   Stable Value Government Trust        $   86    $ 72
   International Equity Fund                 1      41
   Ultra Investors Fund                    145      59
   Select Investors Fund                   600     346
   Balanced Investors Fund                 226     107
   Premium Managed Bond Fund                55      50
   Isco, Inc. Common Stock Fund             13      13
   Participant loans                        42      31
                                        ------    ----

          Total                         $1,168    $719
                                        ------    ----
                                        ------    ----


                                      49

<PAGE>


                         ISCO, INC. RETIREMENT PLU$ PLAN

                                    PN 001
                               EIN #47-0461807
                (amounts in thousands, except per share/unit data)

            ITEM 27a - SCHEDULE OF ASSETS HELD FOR INVESTMENT PURPOSES


<TABLE>
<CAPTION>
                                               July 31, 1996                                   
- ---------------------------------------------------------------------------------------------
Column B                                            Column C              Column D   Column E
- --------                                            --------              --------   --------
                                                  Description of
                                               investment including
                                                collateral, rate of 
Identity of issue, borrower, lessor or        interest, maturity date,                Current
            similar party                       par or maturity value       Cost       Value 
- --------------------------------------------  ------------------------     -------   --------
<S>                                           <C>                          <C>       <C>
Money Market:
- -------------
*Bankers Trust Stable Value Government 
  Trust Fund                                      1,945,541 shares         $1,944    $ 1,946
*Chase Manhattan Bank Pooled Investment              12,036 shares             12         12

Mutual Funds:
*Twentieth Century Select Investors Fund            139,150 shares          5,472      5,066
*Twentieth Century Balanced Investors Fund          155,797 shares          2,439      2,649
*Twentieth Century Premium Managed Bond              91,224 shares            911        891   
*Twentieth Century Ultra Investors Fund             118,544 shares          2,690      3,066
*Twentieth Century International 
  Equity Fund                                       129,942 shares            953      1,034

Other Investments:
- ------------------
*Isco, Inc. Common Stock Fund                        66,354 shares            721        643
*Participant loans                            Interest rates ranging
                                              from 7.25% - 10.50%
                                              maturing August 1996 
                                              - June 2001                      --        513

Balcor Pension Investors II                           101 units                61         43
Balcor Pension Investors III                          202 units                60         45
                                                                                     -------
*Party-in-interest                                                                   $15,908
                                                                           -----------------
                                                                           -----------------
</TABLE>


                                      50

<PAGE>


                                                 ISCO, INC. RETIREMENT PLU$ PLAN

                                                             PN 001
                                                         EIN #47-0461807
                                                     (amounts in thousands)

                               ITEM 27d - SCHEDULE OF REPORTABLE TRANSACTIONS

                                             SINGLE TRANSACTIONS

                                      FOR THE YEAR ENDED JULY 31, 1996



<TABLE>
    Column A                   Column B                      Column C    Column D     Column G     Column H        Column I
- ----------------    -----------------------------------     ----------  ----------   ----------  ---------------  ---------
                                                                                                 Current Value
  Identity of                                                Purchase     Selling      Cost of   on Transaction    Net Gain
 Party Involved              Description of Asset             Price       Price         Asset         Date         or (Loss)
- ----------------    -----------------------------------     ----------  ----------   ----------  ---------------  ---------
<S>                 <C>                                     <C>         <C>          <C>         <C>              <C>
*Bankers Trust       Stable Value Government Trust Fund        $789       $  --         $789          $789           $  --   
</TABLE>

*Party-in-interest












                                      51

<PAGE>


                                  ISCO, INC. RETIREMENT PLU$ PLAN

                                              PN 001
                                          EIN #47-0461807
                    (amounts in thousands, except number of transactions data)

                          ITEM 27d - SCHEDULE OF REPORTABLE TRANSACTIONS

                                      SERIES OF TRANSACTIONS

                                 FOR THE YEAR ENDED JULY 31, 1996

<TABLE>
<CAPTION>
    Column A                   Column B                        Column C        Column D         Column E        Column F 
- ------------------   -------------------------------        --------------  -------------    --------------   -----------
                                                                             Total Dollar
  Identity of                                                  Number of       Value of       Total Dollar      Net Gain
 Party Involved              Description of Asset             Transactions     Purchases     Value of Sales     or (Loss)
- ------------------   -------------------------------        --------------  -------------    --------------   -----------
<S>                  <C>                                    <C>             <C>              <C>              <C> 
*Twentieth Century   Select Investors Fund                         71           $1,522          $                 $   
*Twentieth Century   Select Investors Fund                         65                              822             (13)     
*Twentieth Century   Balanced Investors Fund                       45              469              
*Twentieth Century   Balanced Investors Fund                       60                              345              41
*Twentieth Century   Ultra Investors Fund                          85            1,835           
*Twentieth Century   Ultra Investors Fund                          62                            1,428             155
*Bankers Trust       Stable Value Government Trust Fund           108            2,807       
*Bankers Trust       Stable Value Government Trust Fund            59                            2,439              --
</TABLE>

*Party-in-interest





                                      52




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