MECHANICAL TECHNOLOGY INC
S-2, 1999-05-18
MEASURING & CONTROLLING DEVICES, NEC
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                    Approximate date of proposed sale to the public:
                      AS SOON AS POSSIBLE AFTER THE EFFECTIVE DATE

                        SECURITIES AND EXCHANGE COMMISSION

                              Washington, D.C. 20549
                              ______________________

                                     FORM S-2
                              REGISTRATION STATEMENT

                                      UNDER
                           THE SECURITIES ACT OF 1933
                             ______________________
  MECHANICAL TECHNOLOGY                              14-1462255 
     INCORPORATED                                 (I.R.S. Employer
(Exact name of registrant as                    Identification Number) 
 specified in its charter)
                                                968 Albany-Shaker Road
        New York                                  Latham, NY 12110
(State or other jurisdiction                       (518) 785-2211
   of incorporation or                       (Address, including zip code,
      organization)                              and telephone number,
                                                including area code, of
    Cynthia A. Scheuer                          registrant's principal 
  Mechanical Technology                           executive offices)
      Incorporated
 968 Albany-Shaker Road                      Copies of all communications
    Latham, NY 12110                                     to:
     (518) 785-2211
(Name, address, including zip                  Catherine S. Hill, Esq.
 code, and telephone number,                   Catherine S. Hill, PLLC
including area code, of agent                      One Global View
        for service)                               Troy, NY 12180
                                                Tel: (518) 285-7587
                                                Fax: (518) 285-7564


 























<PAGE>
If any of the securities being registered on this Form are to 
be offered on a delayed or continuous basis pursuant to Rule 415 
under the Securities Act of 1933, as amended ("Securities Act"), 
other than securities offered only in connection with dividend or 
reinvestment plans, check the following box. [ ]

If the registrant elects to deliver its latest annual report to 
security holders, or a complete and legible facsimile thereof, 
pursuant to Item 11(a)(1) of this Form, check the following box.
[X]


	

	If this Form is filed to register additional securities or an 
offering pursuant to Rule 462(b) under the Securities Act, please 
check the following box and list the Securities Act registration 
statement number of the earlier effective registration statement 
for the same offering.  [ ] 

If this Form is a post-effective amendment filed pursuant to 
Rule 462(c) under the Securities Act, please check the following 
box and list the Securities Act registration statement number of 
the earlier effective registration statement for the same 
offering. [ ] 

If delivery of the prospectus is expected to be made pursuant 
to Rule 434, please check the following box.  [ ]


________________________________________________________________________________
                       CALCULATION OF REGISTRATION FEE
________________________________________________________________________________

                                    Proposed        Proposed
Title of Each                       Maximum         Maximum
Class of                            Offering        Aggregate       Amount of
Securities to be    Amount to       Price per       Offering        Registration
Registered          be registered   Share(1)        Price           Fee
________________________________________________________________________________
Stock                               $               $12,000,000     $3,336
________________________________________________________________________________

Total                               $               $12,000,000     $3,336
________________________________________________________________________________


(1) Stock price per share calculated in accordance with Rule 457(c) 
of the Securities Act using the proposed maximum aggregate 
Offering Price.

	The Registrant hereby amends this Registration Statement on 
such date or dates as may be necessary to delay its effective date 
until the registrant shall file a further amendment that 
specifically states that this Registration Statement shall 
thereafter become effective in accordance with Section 8(a) of the 
Securities Act of 1933, as amended, or until the Registration 
Statement shall become effective on such date as the Commission 
acting pursuant to said Section 8(a), may determine.

	



















<PAGE>
              SUBJECT TO COMPLETION DATED MAY 18, 1999

                               PROSPECTUS

                   MECHANICAL TECHNOLOGY INCORPORATED

             RIGHTS TO PURCHASE _________ SHARES OF STOCK


	Mechanical Technology Incorporated is distributing rights to 
purchase shares of stock to its shareholders.  Mechanical 
Technology manufactures advanced test and measurement products 
and, through its joint venture, Plug Power, LLC, invests in the 
research, development and manufacture of Proton Exchange Membrane 
fuel cells.  Proceeds of this offering will be invested in Plug 
Power and may be used for acquisitions for the test and 
measurement business and general working capital requirements.

				
                                                        Total if offering
                        Per Share	 Total		is oversubscribed
                        _________        _____          _________________
Subscription Price                     $10,000,000         $12,000,000
Less Fees                                  170,000             170,000
                                       ___________         ___________
Total Proceeds                         $ 9,830,000         $11,830,000


THE SUBSCRIPTION RIGHTS

* Each Mechanical Technology shareholder will receive the right 
to purchase _________ additional shares of stock for each ____ 
(__) shares they own of record on June 4, 1999.
* If more than ________ shares in total are subscribed for, 
Mechanical Technology may make an additional _________ shares 
available for sale.   
* The price per share is _________. 
* The purchase price is a ______ percent (__%) discount to the 
average closing price for Mechanical Technology's stock for the 
period ______ through _______ 1999.  See "How we determined the 
sale price for the stock."
* The subscription rights will expire at 5:00 p.m., New York City 
time on July 19, 1999.
* The expiration date may be extended. 
* Fractional interests will be rounded up.  No fractional rights 
will be issued and no fractional shares will be sold. 

THE STOCK

* One share is issuable upon the exercise of one right.  
* If a shareholder exercises its right to purchase one share for 
every right held, he or she may subscribe for additional 
shares.  
* Any shares remaining after all rights have been exercised will 
be allocated to those rights holders that subscribed for 
additional shares.
* If the offering is over-subscribed, Mechanical Technology may 
make _______ additional shares available for sale.  Such 
additional shares will be allocated to rights holders that 
subscribed for additional shares.
* Voting rights for new shares will be equal to the voting rights 
for shares currently outstanding.

PURCHASING SHAREHOLDERS

* First Albany Companies, Inc. will purchase at least _________ 
shares in this offering.
* First Albany, through First Albany Private Investment Fund 
1999, LP, an affiliate, will purchase at least _________ 
additional shares. 
* Mechanical Technology's board of directors will purchase at 
least _________ shares in this offering.
* Together, First Albany, and those members of Mechanical 
Technology's board that have said they will exercise their 
rights own 3,164,532 shares, or approximately forty four 
percent (44%) of the outstanding stock.  This percentage will 
increase if other shareholders do not exercise their rights.


<PAGE>
THE OFFERING

* You cannot revoke a decision to exercise.
* American Stock Transfer & Trust will act as subscription agent.
* Payment for any shares of stock should be sent to American 
Stock Transfer & Trust.
* No interest will be paid on funds held for the purchase of 
stock.

Since April 16, 1999, Mechanical Technology's stock has been 
traded on The NASDAQ National Market System under the symbol MKTY. 
From August 1994 to April 15, 1999, Mechanical Technology's stock 
had been traded on the over-the-counter market.  Mechanical 
Technology has filed a registration statement with the Securities 
and Exchange Commission covering the stock to be issued upon 
exercise of the rights.  On May 17, 1999, the closing bid price of 
the stock as reported on The NASDAQ National Market was $27.25 per 
share.

YOU SHOULD CAREFULLY CONSIDER THE RISKS SET FORTH ON PAGE ____ 
BEFORE BUYING STOCK.

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE 
SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES 
COMMISSION, NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY 
STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY 
OF THIS PROSPECTUS.  ANY REPRESENTATION TO THE CONTRARY IS A 
CRIMINAL OFFENSE.

INFORMATION CONTAINED IN THIS PROSPECTUS IS SUBJECT TO COMPLETION 
OR AMENDMENT. A REGISTRATION STATEMENT FOR THE STOCK SOLD IN THIS 
OFFERING HAS BEEN FILED WITH THE SECURITIES AND EXCHANGE 
COMMISSION.  THESE SECURITIES MAY NOT BE SOLD NOR MAY OFFERS TO 
BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT 
BECOMES EFFECTIVE. 

YOU SHOULD RELY ONLY ON THE INFORMATION CONTAINED IN THIS DOCUMENT 
OR THE INFORMATION INCORPORATED BY REFERENCE TO WHICH YOU HAVE 
BEEN REFERRED. MECHANICAL TECHNOLOGY HAS NOT AUTHORIZED ANYONE TO 
PROVIDE YOU WITH INFORMATION THAT DIFFERS FROM SUCH INFORMATION.  
MECHANICAL TECHNOLOGY IS NOT MAKING AN OFFER OF SECURITIES IN ANY 
STATE WHERE THE OFFER IS NOT PERMITTED.  YOU SHOULD NOT ASSUME 
THAT THE INFORMATION IN THIS PROSPECTUS OR ANY PROSPECTUS 
SUPPLEMENT IS ACCURATE AS OF ANY DATE OTHER THAN THE DATE ON THE 
FRONT OF THOSE DOCUMENTS.

           THE DATE OF THIS PROSPECTUS IS MAY 18, 1999.
































<PAGE>

                        PROSPECTUS SUMMARY

The following summary should be read in conjunction with, and is 
qualified in its entirety by, the more detailed information and 
consolidated financial statements, including the related notes, 
appearing elsewhere in this prospectus or incorporated by 
reference into this prospectus.

           DESCRIPTION OF MECHANICAL TECHNOLOGY INCORPORATED

During the last three years, Mechanical Technology has undergone 
significant change. In 1996, First Albany Companies, Inc. 
purchased a substantial interest in Mechanical Technology.  Since 
then First Albany has led a series of transactions to improve 
Mechanical Technology's balance sheet and focus Mechanical 
Technology on its most profitable businesses. With strengthened 
financial resources and streamlined operations, we are now 
prepared to focus on those opportunities we believe will be most 
profitable in the long term.  We believe that the most significant 
opportunity for increased value is Plug Power, LLC, a joint 
venture between Mechanical Technology and Edison Development 
Corp., a subsidiary of DTE Energy, Corp., to develop an 
economically viable Proton Exchange Membrane ("PEM") fuel cell. 
Investment in Plug Power also involves enormous risk.  See "Risk 
Factors - Risks related to Mechanical Technology's Investment in 
Plug Power."  We have issued these rights to purchase Mechanical 
Technology's stock to enable us to continue to invest in Plug 
Power.  We may also use the proceeds of this offering to acquire 
businesses for our test and measurement business or for general 
working capital purposes. See "Risk Factors - Mechanical 
Technology has complete discretion in how the proceeds of this 
offering will be spent."

Mechanical Technology and its joint venture partners Edison 
Development, GE On-Site Power, Inc., a subsidiary of The General 
Electric Company, Southern California Gas Company, a subsidiary of 
SEMPRA Energy Corp., and other private investors, have invested or 
have rights to invest during the next two years more than $100 
million in Plug Power's efforts to manufacture and distribute 
affordable and reliable PEM Fuel Cells.  Plug Power has grown from 
23 former Mechanical Technology employees to over 200 employees in 
just two years.  Recently, Plug Power has successfully 
demonstrated a prototype automotive fuel cell to the Department of 
Energy, installed a prototype fuel cell in the world's first fuel 
cell powered house, and received research funding or other awards 
or commitments for awards for itself and partners of approximately 
$30 million from state and federal government agencies.  Plug 
Power has also received private capital investment in cash and 
non-cash assets of approximately $47 million. Nonetheless many 
challenges remain, including the ongoing need for additional 
funding as well as various research, development and manufacturing 
challenges.  See "Risk Factors - Risks related to Mechanical 
Technology's Investment in Plug Power."

Mechanical Technology's core businesses serve important niche 
markets in the commercial and military sectors as a manufacturer 
of advanced test and measurement products that combine precision 
sensing capabilities with proprietary software and systems to 
serve a variety of applications for commercial and military 
customers. Mechanical Technology has two principal business units: 
the Advanced Products Division, which produces sensing instruments 
and computer-based balancing systems, and Ling Electronics, Inc., 
a developer and manufacturer of vibration test systems and power 
conversion products. 

Advanced Products has two general product families: non-contact 
sensing instrumentation and computer-based balancing systems.  The 
non-contact sensing instrumentation products perform high 
precision position measurements for product design and quality 
control inspection requirements, primarily in the semiconductor 
and computer disk drive industries.  Some of these products bear 
the trademarks FOTONIC and ACCUMEASURE, which are recognized in 
the industry worldwide.  Advanced Product's computer-based 
aircraft engine-balancing systems include an on-wing jet engine 
balancing system used for both commercial and military 
applications.


<PAGE>
Ling, of Anaheim, California, designs, manufactures, and markets
equipment that performs reliability testing and stress screening 
during product development and quality control. This mode of 
testing is used by industry and the military to reveal design and 
manufacturing flaws in a broad range of precision products, from 
satellite parts to computer components.

We believe that the test and measurement industry will undergo 
consolidation in the near future.  The challenges facing 
Mechanical Technology today are similar to those facing other 
smaller companies in industries where consolidation is a fact of 
life.  We believe that consolidation may become a competitive 
necessity and that Advanced Products and Ling are well positioned 
to combine with other businesses to enhance and expand product 
offerings and increase profitability and market position.  
Accordingly, Mechanical Technology is actively exploring strategic 
acquisitions for these business units.

Mechanical Technology Incorporated was incorporated in New York in 
1961.  Unless the context otherwise requires, "Mechanical 
Technology", "registrant", "MTI" and "MECHANICAL TECHNOLOGY" refer 
to Mechanical Technology Incorporated and its subsidiaries. 
Mechanical Technology's principal executive offices are located at 
968 Albany-Shaker Road, Latham, New York 12110 and its telephone 
number is (518) 785-2211.

                           RECENT DEVELOPMENTS

Our total contributions to Plug Power between June 27, 1997 and 
March 26, 1999 (including contributions of cash, assets, research 
credits, and a below market lease) had a value of $14 million.  We 
believe that it is likely we will be asked to contribute up to 
$22.5 million in cash to Plug Power prior to December 31, 2000. 
See "Risk Factors - Mechanical Technology is dependent on Plug 
Power being successful," "Risk Factors - Mechanical Technology is 
committed to continue funding Plug Power" and "Risk Factors - 
Mechanical Technology will be limited in efforts to increase 
shareholder value if it doesn't raise enough money in this 
offering."  In addition, Mechanical Technology, Edison Development 
and Plug Power are finalizing discussions concerning the 
contribution of the Mechanical Technology campus, including all 
land and buildings, to Plug Power in exchange for Plug Power Class 
A membership interests.  If we contribute $22.5 million in cash, 
and contribute the Mechanical Technology land and buildings, our 
aggregate investment in Plug Power as of December 31, 2000 
(including contributions of cash, assets and research credits) 
will be at least $40 million.  See "Risk Factors - Mechanical 
Technology is dependent on Plug Power being successful," "Risk 
Factors - Risks related to Mechanical Technology's Investment in 
Plug Power."

Both Mechanical Technology and Edison Development have each agreed 
to make capital contributions to Plug Power of up to $7.5 million 
in 1999 and $15 million in 2000, in exchange for 3 million shares 
each of Plug Power securities.  In exchange for this commitment, 
Plug Power has agreed that if there is an initial public offering 
of Plug Power's securities at a price of greater than $7.50 per 
share, Mechanical Technology and Detroit Edison may contribute any 
portion of their $22.5 million commitment that has not previously 
been contributed to Plug Power, in exchange for securities at the 
fixed price of $7.50 per share.  If Plug Power requests capital 
contributions, and we do not contribute, we will be penalized.  We 
will forfeit the right to receive Plug Power securities at the 
fixed price of $7.50 per share equal to three times the number of 
shares we would have received had we made the contribution 
requested by Plug Power.  Further, Edison Development may fund not 
only their requested contribution, but also our contribution in 
exchange for Plug Power securities at $7.50 per share.  As a 
result, we will be diluted in our ownership of Plug Power.

We will use a significant portion of the proceeds of this offering 
to fund our commitment to contribute up to $22.5 million to Plug 
Power.  The proceeds of this offering will not fund our full 
commitment to Plug Power.  See "Risk Factors - Risks related to 
Mechanical Technology's investment in Plug Power," "Risk Factors - 
Mechanical Technology is committed to continue funding Plug 
Power," and "Risk Factors - Mechanical Technology will be limited 
in efforts to increase shareholder value if it doesn't raise 
enough money in this offering." 
<PAGE> 
We have entered into a non-binding letter of intent to sell our 
campus, including all land and buildings, to Plug Power, in 
exchange for approximately 615,000 Plug Power Class A membership 
interests and the assumption of approximately $6 million in debt 
by Plug Power.  Mechanical Technology currently owns approximately 
36-acres of land located at 968 and 950 Albany-Shaker Road in 
Latham, New York.  The sale of the campus is subject to the 
approval of the Board of Directors of Mechanical Technology and 
Plug Power. Located on the site are three separate buildings with 
approximately 116,000 square feet of office, laboratory and 
manufacturing space and an approximately 2,000 square foot 
residence.  Mechanical Technology's corporate headquarters and its 
Advanced Products Division currently occupy one of the three 
buildings, which was completed in October 1998, at a cost of 
approximately $3 million. After the land and buildings are sold, 
we will have the right to remain as tenants in our current 
location for a limited period of time.  The Mechanical Technology 
campus is currently encumbered by approximately $6 million in 
debt, which will be assumed by Plug Power, if approved by the 
lender.  Detroit Edison will also contribute approximately $4.7 
million to Plug Power, to assist Plug Power in its building 
project and prevent dilution of its ownership percentage.  Other 
Plug Power members have the right to match Mechanical Technology 
and Detroit Edison's contributions to prevent dilution of their 
current ownership percentages.

In February 1999, Plug Power and GE On-Site Power, Inc., a wholly-
owned subsidiary of The General Electric Company, entered into a 
series of agreements to create a joint venture company, GE Fuel 
Cell Systems, to distribute Plug Power fuel cell systems.  The 
agreements provide that GE Fuel Cell Systems will market, sell, 
install and service Plug Power designed and manufactured fuel 
cells for residential and small commercial power applications on 
an exclusive basis.  Edison Development will retain exclusive 
distribution rights in Michigan, Illinois, Wisconsin and Indiana. 
The initial term of the GE On-Site Power distribution agreement is 
five years.  The agreement may be extended by agreement of the 
parties.  All units will bear both the General Electric and Plug 
Power brand names.  Plug Power must meet certain future quality, 
price, engineering, and design and production standards prior to 
distribution.  See "Risk Factors - Risks related to Mechanical 
Technology's investment in Plug Power "- "Plug Power's fuel cell 
system must meet future price, quality and performance standards." 
GE Fuel Cell Systems must meet certain defined sales targets.

In connection with the General Electric distribution agreements, 
Plug Power granted GE Fuel Cell Systems approximately 10% of its 
Class A membership interests, and warrants to purchase Class A 
membership interests at a fixed price and Plug Power received a 
25% ownership interest in GE Fuel Cell Systems. GE Fuel Cell 
Systems' interest in Plug Power may be reduced in certain 
circumstances. Also in February through April of this year, 
several private investors and Southern California Gas Company 
invested approximately $19 million in cash and services in Plug 
Power, in exchange for Class A membership interests and warrants 
to purchase additional Class A membership interests at a fixed 
price. 

In addition, options for approximately 3 million shares, at 
exercise prices ranging from $1.00 to $6.67 per share, have been 
issued or are reserved for issuance to Plug Power employees. 

Since June 1997, Plug Power has received commitments for over $30 
million from federal and state research programs.  Pursuant to 
Plug Power's Operating Agreement, Mechanical Technology received 
credit, based on the dollar amount of government funding committed 
to Plug Power.  The total credit was approximately $2.8 million.  
As of April 1, 1999, we exchanged a portion of the research 
credits and options to acquire 2.25 million Class A membership 
interests for 2.25 million Plug Power Class A membership 
interests.  Mechanical Technology and Plug Power have reached a 
preliminary agreement to convert the remaining research credits to 
approximately 90,000 Plug Power Class A membership interests.  

Edison Development and Mechanical Technology each own 10 million 
shares of Plug Power, or approximately 40% of the Company. 
Assuming a) Edison Development and Mechanical Technology each 
contribute an additional $22.5 million to Plug Power, b) all 
shares reserved for employee options are issued and exercised, and 
<PAGE>
c) all outstanding warrants are exercised, Mechanical Technology
will own approximately 34% of Plug Power's shares on a fully 
diluted basis. 

For the six months ended March 26, 1999, Mechanical Technology 
recognized $3.315 million as its proportionate share of Plug 
Power's losses. Mechanical Technology recognizes its proportionate 
share of Plug Power losses to the extent of its recorded 
investment.  To the extent other members make equity contributions 
to Plug Power, Mechanical Technology will be required to recognize 
its proportionate share of such contributions as recorded 
investment and additional paid-in-capital. Plug Power is a 
development stage company and has never earned any profits.  Plug 
Power expects to incur losses in excess of $20 million dollars for 
its calendar year ended December 31, 1999. Without any further 
investment in Plug Power, based on the above forecast, Mechanical 
Technology will recognize a significant additional loss of 
approximately $2.3 million in our fiscal year ending September 
1999 related solely to our investment in Plug Power.  Therefore, 
Mechanical Technology expects to report a substantial net loss for 
our fiscal year ending September 1999. If Mechanical Technology 
contributes all or part of the $22.5 million committed to Plug 
Power, we will recognize a substantial additional loss in the year 
the contribution is made. This may have a substantial adverse 
impact on the market price of Mechanical Technology's stock. To 
the extent that Mechanical Technology contributes the Mechanical 
Technology campus, research credits or other non-cash assets to 
Plug Power, Mechanical Technology will increase its Plug Power 
investment and as a result recognize Mechanical Technology's 
proportionate share of Plug Power's losses. See "Risk Factors - 
Mechanical Technology is committed to continue funding Plug 
Power," "Risk Factors - Risks related to Mechanical Technology's 
investment in Plug Power "- "Mechanical Technology is required to 
recognize a portion of Plug Power's losses," "Risk Factors - 
Mechanical Technology is dependent on Plug Power being 
successful," and "Risk Factors - Mechanical Technology will be 
limited in efforts to increase shareholder value if it doesn't 
raise enough money in the offering."

Plug Power anticipates that it will continue to need substantial 
additional capital investment after December 31, 1999. Plug Power 
has individually, and in association with other companies, 
submitted proposals to state and federal government agencies for 
research funding.  Plug Power hopes that decisions as to the 
award, timing and amount of such additional research funding will 
be positive, however, there is no assurance that Plug Power will 
receive any additional funding. If other sources of funding cannot 
be found, Mechanical Technology will be faced with contributing 
and/or lending additional capital to Plug Power or dilution of its 
interest in Plug Power.  If Mechanical Technology lends or 
contributes additional cash to Plug Power, it will recognize 
losses up to the full extent of such investment or advances. If 
Edison Development, Mechanical Technology and other Plug Power 
members stop funding Plug Power and no additional sources of 
capital are found, Plug Power will not be able to continue as a 
going concern. See "Risk Factors - Mechanical Technology is 
dependent on Plug Power being successful," "Risk Factors - 
Mechanical Technology will be limited in efforts to increase 
shareholder value if it doesn't raise enough money in the 
offering," "Risk Factors - Mechanical Technology is committed to 
continue funding Plug Power" and "Risk Factors - Risks related to 
Mechanical Technology's investment in Plug Power "- "Mechanical 
Technology is required to recognize a portion of Plug Power's 
losses."

On April 23, 1999, Mechanical Technology declared a 3 for 2 stock 
split in the form of a stock dividend.  Holders of Mechanical 
Technology's $1.00 par value stock were entitled to receive one 
additional share of $1.00 par value stock for every two 
shares of stock owned as of April 30, 1999.  The rights issued 
pursuant to the offering are based on the number of shares owned 
after the stock split.







<PAGE>

SUMMARY OF THE OFFERING




Description of the 
Offering


If you hold Mechanical Technology stock on June 4, 1999, you will 
receive one non-transferable right to purchase Mechanical Technology stock
for every _____ (__) shares of Mechanical Technology stock you own. 
Fractional rights will be rounded up to the next whole number in 
determining the number of rights to be issued to stockholders.  Each 
right entitles you to purchase one share of Mechanical Technology's 
stock at a purchase price of $_____ ("Exercise Price").  
Mechanical Technology is offering __________ shares of stock for 
purchase through the exercise of rights ("Underlying Shares").  
See "Offering - The Rights."  Mechanical Technology may offer up 
to an additional _______ shares of stock if the offering is over-
subscribed ("Over-Allotment Shares").  See "Offering -Subscription 
for Over-Allotment Shares."


Basic Subscription 
Privilege 


Holders are entitled to purchase, at the Exercise Price, one 
share of stock for each right held.  See "Offering - The Rights," 
"Offering -Subscription Privileges -- Basic Subscription Privilege" 
and "Offering - No Revocation." 


Oversubscription 
Privilege


Each holder who elects to exercise his or her Basic Subscription 
Privilege may also subscribe at the Exercise Price for Underlying Shares, if 
<PAGE>
any, remaining unissued after satisfaction of all subscriptions 
pursuant to the Basic Subscription Privilege and Over-Allotment 
Shares, if any. If an insufficient number of Underlying Shares and 
Over-Allotment Shares are available to satisfy fully all elections to 
exercise the Oversubscription Privilege, the available Underlying Shares and 
Over-Allotment Shares will be allocated on a pro-rata basis among holders who 
exercise their Oversubscription Privilege based on the respective numbers of 
Underlying Shares subscribed for by such holders pursuant to the Basic
Subscription.  See "Offering -Subscription Privileges --Oversubscription 
Privilege" and "Offering - No Revocation."


Subscription for Over-
Allotment Shares


If the offering is oversubscribed, Mechanical Technology may, in its sole 
discretion, issue an over-allotment of up to __________ shares. Such 
over-allotment may be purchased by the holders of rights pursuant to 
their over-subscription privilege.  Any Over-Allotment Shares issued 
will be allocated on a pro-rata basis among holders who exercise 
their Oversubscription Privilege based on the respective numbers of 
Underlying Shares subscribed for by such holders pursuant to the 
Basic Subscription Privilege.  See "Offering - Subscription 
Privileges "- "Subscriptions for Over-Allotment Shares" and 
"Offering - No Revocation."


Transferability of 
Rights 


The rights will not be registered and may not be transferred unless 
the transferee of such 
<PAGE>
rights provides Mechanical Technology with an opinion of counsel stating that 
such transfer is exempt from registration under the Federal Securities 
Act of 1933.  See "Offering - Transferability of Rights."


Commitments to Exercise


First Albany Companies Inc. has agreed to exercise their full Basic
Subscription Privilege. First Albany Companies Inc. also intends to
exercise its over-subscription privilege through its affiliate, First Albany 
Private Investment Fund 1999, LP.  All members of Mechanical Technology's 
board of directors that have not sold shares within the last six 
months intend to exercise their full Basic Subscription Privilege.  Such
board members may also exercise their Oversubscription Privilege.
(First Albany and the board members exercising their subscription privileges 
are, collectively, the "Purchasing Shareholders"). The Purchasing Shareholders 
currently own 3,164,532 shares, or approximately forty four percent (44%) 
of the outstanding stock of Mechanical Technology.  After exercise of the full 
Basic Subscription Privilege, the Purchasing Shareholders will own __________ 
shares or approximately __________ percent (__%) of the outstanding stock 
of Mechanical Technology, assuming no other stockholders exercise their Basic 
Subscription Privilege. If the Purchasing Shareholders exercise their full 
Oversubscription Privilege, including rights to Over-Allotment Shares
(assuming there are Over-Allotment Shares), the Purchasing Shareholders
will own _______ shares or approximately ______ 
<PAGE>
percent (____%) of the outstanding stock of Mechanical Technology, 
assuming all other stockholders exercise their Basic Subscription 
Privilege but do not exercise their Oversubscription Privilege.


Exercise Price


If you wish to exercise your rights to purchase stock, the Exercise 
Price will be $_____ per share. See "Risk Factors - The sale price for 
shares issued in this offering may be substantially lower than 
its market price," "Risk Factors - How we determine the sale price 
for the stock."


When You Can Exercise 
Your Rights


The rights will only be exercisable from the period beginning on 
________, 1999, and ending on July 19, 1999 at 5:00 p.m., New York 
City time, unless extended by Mechanical Technology from time to 
time.  See "Offering - Expiration Date."


Number of shares of
Stock Offered in
the Offering


__________ shares if the offering is not oversubscribed and up to 
_____ shares if the offering is oversubscribed and Mechanical Technology 
permits Over-Allotment Shares to be issued.


Record Date


June 4, 1999.



Expiration Date


July 19, 1999, unless extended by Mechanical Technology from time to 
time, provided that the Expiration Date shall not be later than 
<PAGE>
September 24, 1999, unless the board of directors determines 
that a material event has occurred that necessitates one or more 
further extensions of the rights to permit adequate disclosure of 
information concerning such event to holders.  If Mechanical Technology 
elects to extend the term of the rights, it will issue a press 
release to such effect not later than the first day on which The NASDAQ 
National Market is open for trading following the most recently announced
Expiration Date.  In the event Mechanical Technology elects to extend the 
term of the offering by more than 14 calendar days, it will, in 
addition, cause written notice of such extension to be sent promptly to 
all holders of record on the Record Date. See "Offering - Expiration 
Date."


Procedure for Exercising 
Rights


Rights may be exercised by properly completing the certificate 
evidencing such rights (the "Subscription Certificate") and forwarding such 
Subscription Certificate (or following the Guaranteed Delivery Procedures,
as defined below) to the Subscription Agent on or prior to the Expiration 
Date, together with payment in full of the Exercise Price for each 
Underlying Share and Over-Allotment Share subscribed for pursuant 
to the Subscription Privileges.  If the mail is used to forward Subscription 
Certificates and/or payment, insured, registered mail should be used.
The exercise of a right may not be revoked or amended. If time does not
permit a holder of a right to deliver its Subscription Certificate to the 
Subscription Agent on or before the Expiration Date, such holder should 
make use of the 
<PAGE>
Guaranteed Delivery Procedures described under "Offering - Exercise of Rights." 
Please note that funds paid by uncertified personal check may take 
at least five business days to clear.  Accordingly, holders who wish to pay
the Exercise Price by means of uncertified personal check should make 
payment sufficiently in advance of the Expiration Date to insure that such
payment is received and clears by such date.  Holders should consider payment 
by means of certified or cashier's check, money order or wire transfer 
of funds.  See "Offering - Exercise of Rights" and "Offering -Over/Underpayment
of Exercise Price."


Persons Holding Shares, 
or Wishing to Exercise 
Rights Through Others


Persons holding shares of stock and receiving the rights distributable 
with respect to such shares through a broker, dealer, commercial bank, 
trust company or other nominee, as well as persons holding certificates of
stock personally who would prefer to have such institutions effect 
transactions relating to the rights on their behalf, should give 
timely instructions to their broker, dealer, commercial bank, trust 
company or other nominee and request it to effect the transactions for 
them.  See  "Offering - Exercise of Rights" and "Offering - Exercise of 
Rights through Third Parties."



Closing and Issuance of
Stock


The closing will occur and certificates representing Underlying Shares and
Over-Allotment Shares, if any, will be delivered to subscribers as soon 
as practical after the Expiration Date and 
<PAGE>
after all prorations have been effected.  See "Offering - Subscription
Privileges" and "Offering - Delivery of Subscription Certificates."  No 
Underlying Shares or Over-Allotment Shares, if any, will be issued 
until the closing.  Funds delivered to the Subscription Agent for 
the exercise of Subscription Privileges will be held in escrow 
by the Subscription Agent until the closing. No interest will be paid 
to holders on funds held by the Subscription Agent.  In the case of 
holders exercising Over-Subscription Privileges, any excess funds will be 
returned to the holders as soon as practical following the closing.



Stock to be Outstanding
After the Offering


After this offering, a) assuming all rights are subscribed for but no 
Over-Allotment Shares are issued, _________ shares of stock will be 
outstanding, and b) assuming all rights are subscribed and all Over-
Allotment Shares are issued, _______ shares of stock will be 
outstanding (in each case not including 753,773 shares issuable 
upon the exercise of outstanding stock options at a weighted 
average exercise price of $4.70 per share, of which options to 
purchase 383,391 shares of stock were exercisable as of April 
16, 1999, as adjusted for the stock split).

 
How We Intend to Use the 
Proceeds



It is anticipated that the net proceeds to Mechanical Technology 
will be approximately $9.8 million if all of the Underlying Shares 
are purchased in the offering and $11.8 million if all Over-
Allotment Shares are also purchased.  If less 
<PAGE>
than all of the Underlying Shares are purchased, the proceeds 
will be correspondingly reduced. See "Risk Factors - Mechanical Technology 
will be limited in efforts to increase shareholder value if it 
doesn't raise enough money in this offering."  The net proceeds from 
this offering will be used for further investment into Plug Power. See
"Recent Developments," "Risk Factors - Risks related to Mechanical 
Technology's investment in Plug Power -- Mechanical Technology is 
required to recognize a portion of Plug Power's losses," "Risk Factors - 
Mechanical Technology will be limited in efforts to increase 
shareholder value if it doesn't raise enough money in this offering" 
and "Risk Factors - Mechanical Technology is committed to continue 
funding Plug Power."  Mechanical Technology may also use the proceeds of
the offering for test and measurement acquisitions, efforts to 
increase market share, working capital, general corporate purposes and 
other capital expenditures.  See "Risk Factors - Mechanical Technology has
complete discretion in how the proceeds of this offering will be spent" 
and "Use of Proceeds."


Subscription Agent


American Stock Transfer & Trust Company.  See "Offering - Subscription 
Agent."


















<PAGE>
            
          STATEMENT CONCERNING FORWARD LOOKING STATEMENTS

Statements in this prospectus and in all documents incorporated by 
reference into this prospectus that are not statements of 
historical fact are "forward-looking statements" within the 
meaning of the Private Securities Litigation Reform Act of 1995.  
These forward-looking statements include statements regarding 
future revenues, expenses and profits.  Forward-looking statements 
are subject to known and unknown risks, uncertainties or other 
factors that may cause Mechanical Technology's actual results to 
be materially different from the historical results or from any 
results expressed or implied by the forward-looking statements.  
Such risks include, but are not limited to, those discussed below 
under "Risk Factors" and "Management's Discussion and Analysis of 
Results of Operations and Financial Condition" in Mechanical 
Technology's Form 10-Q for the quarter ended March 26, 1999, 
attached hereto as Exhibit 13.2.  All cautionary statements made 
in this prospectus apply to all forward-looking statements 
wherever they appear.

                         RISK FACTORS

An investment in the stock being offered by this prospectus 
involves a high degree of risk.  In addition to the other 
information contained in this prospectus or incorporated in this 
prospectus by reference, prospective investors should carefully 
consider the following risk factors before purchasing the stock 
offered by this prospectus.

Mechanical Technology is dependent on Plug Power being successful.
Mechanical Technology's stock price and continued success is 
almost exclusively dependent on the success of Plug Power.  During 
the last two years, every available Mechanical Technology resource 
has been devoted to Plug Power.  Mechanical Technology intends to 
devote most, if not all, of the proceeds of this offering to Plug 
Power.  If Mechanical Technology obtains additional resources in 
the future, it will likely devote these resources to Plug Power.  
There is no assurance Plug Power will be successful.

Risks related to Mechanical Technology's investment in Plug Power.

Plug Power will spend millions of dollars before we know 
whether it can profitably sell PEM fuel cells. 
Mechanical Technology and Detroit Edison have each contributed $14 
million in cash and other assets to Plug Power since June 27, 
1997.  Other investors have contributed cash and other assets 
valued at approximately $20 million to Plug Power.  The government 
has committed over $30 million in research funding to Plug Power 
and its research partners to be distributed over the next several 
years. Even if Mechanical Technology and Detroit Edison together 
contribute an additional $45 million to Plug Power, it may not be 
enough money to fully fund Plug Power's operations through 
commercialization.  We do not know how much money Plug Power will 
need to get to commercialization.  We do not know whether Plug 
Power will ever produce a commercial product.  See "Risk Factors -
Mechanical Technology is committed to continue funding Plug 
Power." Even if the $45 million is sufficient to fund Plug Power 
through commercialization, Mechanical Technology believes that 
Plug Power will continue to need substantial additional investment 
until it can profitably sell PEM fuel cell systems to the public. 
We don't know when, if ever, such sales will be made.  If 
Mechanical Technology and Plug Power's other members stop funding 
Plug Power, and no other sources of funding are found, Plug Power 
will be unable to continue as a going concern.  If Edison 
Development, other Plug Power members, or other investors fund 
Plug Power, and Mechanical Technology does not, Mechanical 
Technology's interest in Plug Power will suffer substantial 
dilution.

Plug Power has not completed, and may never complete, 
research and development of an economically viable PEM fuel cell.
Plug Power is engaged in the research and development of an 
economically viable PEM fuel cell. Plug Power's research efforts 
are ongoing with respect to each and every component of the fuel 
cell in an effort to decrease costs and improve the efficiency, 
reliability, size and safety of the fuel cell system.  Since June 
1997, Plug Power has produced a limited quantity of test and 
demonstration fuel cell units.  Substantial research and 
<PAGE>
development on the PEM fuel cell system must still be completed.
We do not know when or whether Plug Power will successfully 
complete research and development.  Even if Plug Power completes 
its research and development, we do not know whether its 
competitors will do so more effectively or more quickly.  Plug 
Power faces intense competition from a number of companies, 
including at least one competitor that is significantly larger 
with significantly greater resources.  Finally, even if Plug Power 
successfully produces an economically viable PEM fuel cell, there 
is no guarantee that any product that Plug Power may ultimately 
produce will find a market.

Plug Power's fuel cell system must meet future price, quality 
and performance standards.
Plug Power's agreements with GE Fuel Cell Systems require Plug 
Power to meet future quality, price, engineering, design and 
production standards.  Research and development is ongoing but we 
do not know when or whether Plug Power will meet these standards. 
If Plug Power does not meet the standards, there may be serious 
adverse consequences for Plug Power.

Plug Power has no experience manufacturing PEM fuel cells.
No company, including Plug Power, has experience mass-
manufacturing PEM fuel cell systems.  A fuel cell system contains 
complex mechanical, electrical and chemical components.  Plug 
Power is currently developing its manufacturing process. There is 
no assurance Plug Power will develop an efficient manufacturing 
process that will meet the quality, price, engineering, design and 
production standards or production volumes required by Plug 
Power's agreements with GE Fuel Cell Systems, or otherwise 
established by the marketplace.  Even if Plug Power is successful 
in developing its manufacturing process, we do not know whether it 
will be completed in time to satisfy the requirements of GE Fuel 
Cell Systems or other potential distributors or customers. 

Plug Power has not yet established long-term relationships 
with third party suppliers.
Plug Power is currently testing components and parts from various 
suppliers and will soon begin negotiating long-term purchase 
agreements for component parts and subsystems for the fuel cell 
system.  Plug Power's ultimate success is dependent on 
establishing long-term relationships with suppliers. We do not 
know when or whether Plug Power will be able to enter into 
relationships with suppliers, or whether such relationships will 
be on terms that are favorable to Plug Power.

Plug Power may not be able to protect important intellectual 
property. 
Plug Power's ability to compete effectively against other fuel 
cell companies will depend, in part, on its ability to maintain 
the proprietary nature of its technology and manufacturing 
processes.  Plug Power believes that its technology provides 
certain competitive advantages over its competitors.  Plug Power 
currently believes that its portfolio of patents, patents pending, 
trade secrets and contractual rights is sufficient to secure this 
competitive advantage.  We do not know whether any of Plug Power's 
pending patent applications will issue or, in the case of patents 
issued or to be issued, that the claims allowed are or will be 
sufficiently broad to protect Plug Power's technology. Even if all 
necessary patents are issued and every patent is sufficiently 
broad, they may be challenged or invalidated.  Plug Power could 
incur substantial costs in prosecuting or defending patent 
infringement suits.  While Plug Power has attempted to safeguard 
and maintain its proprietary rights, we do not know whether it has 
been or will be completely successful in doing so.  Further, Plug 
Power's competitors may independently develop or patent 
technologies that are substantially equivalent or superior to Plug 
Power's technology. If Plug Power is found to be infringing third 
party patents, we do not know whether it will be able to obtain 
licenses on acceptable terms, if at all.  Failure to obtain needed 
licenses could delay or prevent the development, manufacture or 
sale of PEM fuel cell systems.  Plug Power relies, in part, on 
contractual provisions to protect its trade secrets and 
proprietary knowledge.  These agreements may be breached, and Plug 
Power may not have adequate remedies for any breach.  Plug Power's 
trade secrets may also be known without breach of such agreements 
or may be independently developed by competitors.

Plug Power is dependent on certain key personnel.
<PAGE>
Plug Power has attracted a highly skilled management team and
specialized workforce, including scientists, engineers, 
researchers, and manufacturing and marketing professionals.  Plug 
Power is dependent on its management team and specialized 
workforce.  Loss of the services of several members of its 
management team or specialized workforce could adversely affect 
Plug Power.  In addition, Plug Power's ability to manage growth 
effectively will require it to continue to implement and improve 
its management systems and to recruit and train new employees.  
Although Plug Power has done so in the past and expects to be able 
to do so in the future, there can be no assurance that Plug Power 
will be able to successfully attract and retain skilled and 
experienced personnel.   

Plug Power needs a strong stock market for it to continue 
raising capital.
Plug Power will continue to need substantial capital investment 
after December 31, 1999. A downturn in the public financial 
markets will severely limit Plug Power's ability to engage in an 
initial public offering of its securities on terms that are 
favorable to Plug Power, this in turn, may severely limit Plug 
Power's ability to raise capital from private investors.  If 
Mechanical Technology, Edison Development or other Plug Power 
members do not continue to fund Plug Power, and other sources of 
funding cannot be found, Plug Power will be unable to continue as 
a going concern.
  
Mechanical Technology is required to recognize a portion of 
Plug Power's losses.
For the six months ended March 26, 1999, we recognized $3.315 
million as our proportionate share of Plug Power's losses. We 
recognize our proportionate share of Plug Power losses to the 
extent of our recorded investment.  To the extent other members 
make equity contributions to Plug Power, we are required to 
recognize our proportionate share of such contributions as 
recorded investment and additional paid-in-capital. Plug Power is 
a development stage company and has never earned any profits.  
Plug Power expects to incur losses in excess of $20 million 
dollars for its calendar year ended December 31, 1999. Without any 
further investment in Plug Power, based on the above forecast, we 
will recognize a substantial additional loss of approximately $2.3 
million in our fiscal year ending September 1999 related solely to 
our investment in Plug Power. Therefore, we expect to report a 
substantial loss for our fiscal year ending September 1999.  If we 
contribute all or part of the $22.5 million committed to Plug 
Power prior to December 31, 2000, based on Plug Power's forecasted 
loss, we will recognize an additional loss of approximately $9.4 
million in our fiscal year ending September 2000 or 2001, 
depending on the timing of the contribution. This may have a 
substantial adverse impact on the market price of our stock. To 
the extent that we contribute the Mechanical Technology campus, 
research credits or other non-cash assets to Plug Power, we will 
increase our Plug Power investment and as a result recognize our 
proportionate share of Plug Power's losses. 

Plug Power has always lost money and will continue to lose money until
it can profitably sell PEM fuel cells to the public. Since its inception
on June 27, 1997, Plug Power has incurred substantial losses.  Plug
Power's losses are detailed in the following summary of financial data
as of and for the years ended December 31:
                                                     Cumulative
Statement of Earnings Data      1998       1997     From Inception
Contract Revenue               $ 6,541    $ 1,194      $  7,735
Loss on Contracts               (2,323)       (31)       (2,354)
Research and Development
 Expenses                        4,633      5,344(1)      9,977
Net Loss                        (9,616)    (5,903)      (15,519)
Other Information
Capital Expenditures             2,369        362         2,731
Depreciation and Amortization      382         30           412
Balance Sheet Data
Working Capital                  2,693      2,667
Shareholder's Equity             5,493(2)   3,597(3)
________________________________
(1)Includes a one-time writeoff of $4,200,000 of in-process research and 
development costs.
(2)Includes $2,500,000 for deferred rent and in-kind services. 
(3)Includes $4,750,000 interest in certain net assets and in-process research 
and development.
<PAGE>
Plug Power anticipates that it will lose at least $20 million in 
the year ended December 31, 1999.  Plug Power will continue to 
sustain significant losses until it can produce sufficient 
revenues to cover its costs.  We expect that such revenues will 
not be generated until Plug Power can cost-effectively produce and 
sell PEM fuel cell systems to the public. We do not know when, if 
ever, Plug Power will sell PEM fuel cell systems to the public on 
a profitable basis.

Mechanical Technology is committed to continue funding Plug Power.
Mechanical Technology and Edison Development have each agreed to 
contribute up to $22.5 million to Plug Power to fund continuing 
operations for the period April 1, 1999 through December 31, 2000. 
Unless Plug Power offers its shares in an initial public offering, 
it cannot request more than $7.5 million in funding prior to 
December 31, 1999, and $15 million in funding prior to December 
31, 2000.  Even if we raise $12 million in this offering, we won't 
have enough cash to invest $22.5 million in Plug Power.  If Plug 
Power requests a capital contribution or offers its shares in an 
initial public offering, we will be forced to seek additional 
financing or investment if we want to invest in Plug Power.  There 
is no assurance we will receive additional financing or 
investment, or that such financing or investment will be on 
favorable terms.  If we don't fund Plug Power when asked, our 
right to purchase Plug Power shares at the fixed price of $7.50 
per share will be reduced by three times the amount of the 
contribution requested.  We don't know when, if ever, we will make 
additional contributions to Plug Power, however, it is likely that 
a substantial portion of the proceeds of this offering will be 
contributed to Plug Power.  If we don't make additional 
contributions to Plug Power and Edison Development or other 
investors do, our interest in Plug Power will be diluted.  If 
Mechanical Technology and Edison Development fail to make 
additional contributions to Plug Power when asked, and no other 
sources of funding are found, Plug Power will be unable to 
continue as a going concern.

Mechanical Technology has complete discretion in how the proceeds 
of this offering will be spent.
We may use all proceeds of the offering for further investments 
into or loans to Plug Power. We may also use the proceeds of the 
offering for acquisitions, efforts to increase market share, 
working capital, general corporate purposes and other capital 
expenditures. The specific uses of the proceeds will be at the 
complete discretion of Mechanical Technology and may be allocated 
from time to time based on a variety of circumstances.  There is 
no assurance we will spend the money wisely or in a way that will 
improve the financial condition of Mechanical Technology.


Mechanical Technology will be limited in its efforts to increase
shareholder value if it doesn't raise enough money in this 
offering.
There is no assurance that we will raise all the money sought in 
this offering.  If we don't raise enough money in this offering, 
our ability to make further investments in or loans to Plug Power 
and to make acquisitions or otherwise increase the market share of 
our core businesses will be substantially limited.


The members of Mechanical Technology's board and management have
conflicts of interest with Plug Power and First Albany.
George McNamee is Chairman of the Board of Directors of each of 
the following entities; First Albany Companies, Inc., Mechanical 
Technology and Plug Power, and is also Chief Executive Officer of 
Mechanical Technology and Co-Chief Executive Officer of First 
Albany.  Drs. Beno Sternlicht and Walter Robb are members of the 
Board of Directors of Mechanical Technology and Plug Power.  
George McNamee does not receive a salary for acting as Chief 
Executive Officer and Chairman of the Board of Mechanical 
Technology or Chairman of the Board of Plug Power.  Mr. McNamee 
has received options to purchase 20,000 shares of Mechanical 
Technology stock, at exercise prices of $7.9375 and $18.75 per 
share.  Mr. McNamee was also issued 110,000 options to purchase 
Plug Power Class B membership interests at exercise prices of 
$1.00 and $5.00 per share.  Drs. Beno Sternlicht and Walter Robb, 
each members of the Board of Directors of Mechanical Technology 
and Plug Power, were issued 30,000 options for Mechanical 
Technology stock at exercise prices of $2.50, $6.00 and $18.75 per 
<PAGE>
share, and 60,000 options to purchase Plug Power Class B
membership interests at exercise prices of $1.00 and $5.00 per 
share.  Alan Goldberg is a member of the Board of Directors of 
First Albany and Mechanical Technology and Co-Chief Executive 
Officer of First Albany.  Mr. Goldberg was issued 20,000 options 
to purchase Mechanical Technology stock at exercise prices of 
$7.9375 and $18.75 per share.  First Albany owns 34% of the 
outstanding stock of Mechanical Technology.  These 
interrelationships create the potential for conflicts of interest 
to arise in connection with the exercise by Mechanical 
Technology's directors of their respective fiduciary duties.

This offering will result in dilution for current shareholders and 
may result in a decrease in Mechanical Technology's stock price.
Assuming all ____________ shares in this offering, are subscribed 
for, a purchaser in this offering will experience immediate and 
substantial dilution of approximately $______ in value per share. 
If we decide to increase the number of shares offered to ________ 
shares, a purchaser of stock in this offering will experience 
immediate and substantial dilution of approximately $____ in value 
per share.  This is because the $______ share price exceeds the 
$______ pro-forma net tangible book value per share on March 26, 
1999 of Mechanical Technology's stock after giving effect to the 
offering.  If you don't exercise your rights to purchase 
additional shares, and others do, you will realize a dilution in 
your percentage voting interest and ownership interest in future 
net earnings, if any.  The $______ sales price for shares 
represents approximately a _______ percent (___%) discount to 
Mechanical Technology's average closing bid price for the ___ days 
preceding June 4, 1999 and may result in a reduction in the market 
price for our stock.

The sale price for shares issued in this offering may be 
substantially lower than its market value.
The sale price for stock issued in this offering was determined by 
our board of directors based on the advice of the independent 
Consulting and Investment Banking firm of Schwartz Heslin Group, 
Inc.  The stock price does not necessarily bear any relationship 
to the prices at which shares of stock have traded in the market 
or in private transactions, or to Mechanical Technology's 
earnings, assets, book value, financial condition or any other 
recognized criterion of value. There can be no assurance that the 
value of stock will not decline below $_______.

Mechanical Technology's stock price is subject to significant 
price fluctuations. 
The trading price of our stock has been, and in the future could 
be, subject to significant fluctuations in response to variations 
in quarterly operating results (including losses related to our 
investment in or advances to Plug Power), announcements by Plug 
Power, the gain or loss of significant contracts, changes in 
management, new products or services by Mechanical Technology or 
its competitors, general trends in the industry and other events 
or factors.  In addition, the stock market has experienced extreme 
price and volume fluctuations that have particularly affected the 
market price for many companies in similar industries and that 
have often been unrelated to the operating performance of these 
companies.  These broad market fluctuations may reduce the market 
price of our stock.

Mechanical Technology will issue up to an additional _________ 
shares of stock in this offering.
Mechanical Technology has 15 million authorized shares of stock, 
$1.00 par value.  Up to ______ shares will be issued in connection 
with this offering (assuming every share available pursuant to 
this offering, including over-allotment shares, are issued), 
resulting in a maximum of ______ shares outstanding after 
completion of this offering.  Our board of directors has 
authority, without action or vote of the shareholders, to issue 
all or part of the authorized but unissued shares.  Any such 
issuance could further dilute the percentage ownership interest of 
shareholders and may further dilute the book value of our stock.

Mechanical Technology is dependant on attracting and retaining 
technical employees.
We believe that our future success depends in large part on our 
ability to attract, retain and motivate highly skilled employees, 
particularly technical employees.  These employees are likely to 
remain in limited supply for the foreseeable future.  We don't 
<PAGE>
know that we will be able to attract and retain sufficient numbers
of highly skilled technical employees.  The loss of a significant 
number of our technical employees could have a material adverse 
effect on Mechanical Technology.

Mechanical Technology faces intense competition.
We face intense competition from several companies, many of which 
are larger than we are and have greater financial resources.  
While Advanced Products and Ling each have a major share of their 
respective markets, we do not consider either of them to be 
dominant in their industry.  The primary competitive 
considerations for our businesses are; product quality and 
performance, price, and timely delivery.  These competitive 
pressures have restrained, and can be expected in the future to 
restrain, the growth and profitability of our businesses, which 
may reduce our stock price.

Mechanical Technology continues to have reduced profits and sales 
because of unfavorable economic conditions in Asia.
Our operations have been harmed by unfavorable financial and 
economic conditions in Asia.  Such conditions are outside of our 
control and may continue for the foreseeable future.  Recent 
economic events in Asia have caused large currency fluctuations 
and reduced spending in such areas.  Our operating results may 
continue to be adversely affected by such crises due to the 
potential for significant decreases in demand for our products and 
services, the potential for foreign governments to implement 
prohibitions and limitations on U.S. companies, and the potential 
for foreign currency losses. Such events could reduce our stock 
price.

Mechanical Technology is controlled by its existing stockholders.
The members of our present board of directors directly or 
indirectly own more than forty-seven percent (47%) of our 
outstanding stock. It is unlikely that a shareholder who purchases 
stock in this offering will be able to obtain representation on 
Mechanical Technology's board of directors (unless they first 
obtain the support of the shareholders on the existing board), or 
otherwise exercise any control or influence over Mechanical 
Technology's management. Furthermore, the substantial 
shareholdings by members of our board of directors make it 
unlikely that an independent third party could effect a change in 
control of Mechanical Technology without the consent of the board. 
This means that our board of directors and management are 
insulated from objections and challenges by shareholders to 
actions taken by the board and management in the conduct of 
Mechanical Technology's business and the formulation of its 
business objectives, strategies and policies.  This may reduce the 
market value of our stock.

Mechanical Technology's core businesses are characterized by rapid 
technological change.
The market for many of our products and services is characterized 
by rapidly changing technology and evolving industry standards.  
We don't know whether our current technology base will continue to 
address current and evolving customer needs. We believe that our 
future success will depend on our ability to develop and 
manufacture new products and product enhancements and to introduce 
them successfully into the market.  Failure to do so in a timely 
fashion could harm our competitive position. The announcements or 
introductions of new products by Mechanical Technology or its 
competitors may adversely affect our operating results, because 
these announcements or introductions may cause customers to defer 
or forego ordering products from Mechanical Technology's existing 
product lines. Moreover, there is no assurance we will have 
sufficient funds to finance product introductions, enhancements or 
developments.

Mechanical Technology faces risks related to year 2000 compliance.
We have reviewed the impact of the year 2000 on software installed 
in our products.  Current versions of Mechanical Technology's 
products are designed to be "Year 2000" compliant. We are 
finalizing our evaluation of the impact of any non-compliance of 
previously installed products or purchased software and related 
products on Mechanical Technology and its customers and suppliers. 
We do not currently believe that the effects of any potential Year 
2000 non-compliance in Mechanical Technology's products will 
result in any material adverse impact on our business or financial 
condition.  We do not know whether we will be exposed to potential 
<PAGE>
claims resulting from system problems associated with the arrival
of the Year 2000.

Mechanical Technology has never paid cash dividends.
Since its inception, we have not paid any cash dividends on our 
stock.  We anticipate that future earnings, if any, will be 
retained for use in the business or for other corporate purposes, 
and we do not anticipate that any cash dividends on stock will be 
paid in the foreseeable future.  

In addition to the matters discussed above, prospective investors 
should consult their own attorneys, accountants and other 
professional advisors as to legal, tax and related matters 
concerning their prospective investment in Mechanical Technology's 
stock.


             SUMMARY CONSOLIDATED FINANCIAL INFORMATION

     Set forth below is summary consolidated financial information 
and certain adjusted financial information of Mechanical 
Technology.  The consolidated financial information as of and for 
the five years ended September 30, 1998 set forth below has been 
derived from consolidated financial statements audited by 
PricewaterhouseCoopers LLP, independent public accountants.  The 
consolidated financial data as of and for the six months ended 
March 26, 1999 and March 27, 1998 has been derived from unaudited 
consolidated financial statements which, in the opinion of 
management, reflect all adjustments (consisting only of normal 
recurring accruals) necessary for a fair presentation of the 
financial data for such periods.  The following information should 
be read in conjunction with "Management's Discussion and Analysis 
of Results of Operations and Financial Condition" and Mechanical 
Technology's consolidated financial statements and the accompanying 
notes set forth in Mechanical Technology's Form 10-K for the year 
ended September 30, 1998 and Form 10-Q for the quarter ended March 
26, 1999, attached hereto as Exhibit 13.2






































<PAGE>
<TABLE>
                                      Six  Months                        Years Ended September 30
                                      (unaudited)                                 (audited)
                                                                           
                                 1999            1998           1998        1997       1996        1995        1994
Statement of Earnings Data:                               (in thousands, except per share data)

<S>                             <C>            <C>            <C>        <C>         <C>          <C>         <C>
Net Sales                       $6,003         $10,249        $21,028    $24,102     $22,755      $18,140     $29,721 

Gross Profit                     2,063           4,249          8,642      9,628       8,830        6,145      11,800

Operating (Loss) Income           (849)            996          1,999      1,593       1,069       (2,167)      2,157

Gain on sale of 
subsidiary/division or building 
 . . . . . . . . . . . . .            -               -              -      2,012         750        6,779       1,856

(Loss) Income from Continuing 
Operations before Extraordinary 
Item and Income Taxes           (4,157)            865         (2,006)     2,701         673        3,352         816

(Loss) Income  from Continuing 
Operations before Extraordinary 
Item                            (4,157)            865         (2,031)     2,558         598        3,256         201

Extraordinary Item - Gain on
Extinguishment of Debt, net
of  taxes ($106)                     -               -              -      2,507           -            -           -

(Loss) Income from 
Continuing Operations           (4,157)            865         (2,031)     5,065         598        3,256         201

(Loss) Income from
Discontinued Operations, Net
of Taxes                             -          (2,285)(2)     (2,285)(2)   (545)      3,150         (334)    (24,579)(1) 

Net (Loss) Income               (4,157)         (1,420)        (4,316)     4,520       3,748        2,922     (24,378)  

Diluted Earnings Per Share:(3)

(Loss) Income from Continuing 
Operations before Extraordinary 
Item                             (0.39)           0.09          (0.23)      0.30        0.10         0.61        0.04

Extraordinary Item                   -               -              -       0.29           -            -           -

(Loss) Income from                   
Discontinued Operations              -           (0.25)         (0.26)     (0.06)       0.54        (0.06)      (4.64)

Net (Loss) Income                (0.39)          (0.16)         (0.48)      0.53        0.64         0.55       (4.60)

Weighted Average Shares         
Outstanding and 
Equivalents                 10,782,191       9,124,610      8,905,737  8,508,068   5,867,928    5,339,684   5,294,822

Other Information:

Capital Expenditures.....        2,560             115          3,166        377         264          409         426

Depreciation and    
Amortization                       316             143            323        243         233          358         460

Balance Sheet Data:

Working Capital (Deficit)         8,548          5,450          5,779      7,696       7,086        2,712      (6,219)

Total Assets                     23,449         12,594         21,128     14,003      13,481        3,444      23,971

Total Long Term Debt              6,000              -              -          -       5,508        6,960      11,182

Total Shareholders' Equity         
(Deficit)                        13,014          6,799         11,124      8,213       2,164       (3,490)     (6,418)

(1) Includes a net charge of $15,415,000 related to the discontinuance of Mechanical Technology's United Telecontrol
    Electronics, Inc. subsidiary.
(2) Includes a net charge of $1,769,000 related to the discontinuance of Mechanical Technology's Technology Division.
(3) Earnings per share have been restated to comply with SFAS No. 128, "Earnings Per Share." 
</TABLE>
<PAGE>
                                USE OF PROCEEDS

The net proceeds of the offering are estimated to be approximately $9.8 
million after expenses of the offering.  If the offering is over-subscribed, 
and we decide to increase the number of shares available to ___________, and 
all such shares are subscribed for, the net proceeds are estimated to be 
approximately $11.8 million after the payment of expenses of the offering.  
See "Risk Factors - Mechanical Technology is committed to continue funding 
Plug Power," "Risk Factors - Mechanical Technology has complete discretion 
in how the proceeds of this offering will be spent," "Risk Factors - 
Mechanical Technology will be limited in efforts to increase shareholder 
value if it doesn't raise enough money in this offering," and "Offering -
Subscriptions for Over-Allotment Shares."  We intend to use substantially 
all of the net proceeds of this offering for further investments into Plug 
Power.  We may also use the proceeds of the offering for acquisitions for 
our test and measurement business, efforts to increase market share, working 
capital, general corporate purposes and other capital expenditures. See 
"Risk Factors - Mechanical Technology is committed to continue funding Plug 
Power," "Risk Factors - Mechanical Technology has complete discretion in how 
the proceeds of this offering will be spent," "Risk Factors - Mechanical 
Technology will be limited in efforts to increase shareholder value if it 
doesn't raise enough money in this offering." Although we intend to pursue 
acquisitions, we have no current contract or commitment with respect to any 
particular acquisition.

              HOW WE DETERMINED THE SALE PRICE FOR THE STOCK

The sale price of $_____ per share was determined by the board of directors 
upon the advice of the independent Consulting and Investment Banking firm of 
Schwartz Heslin Group, Inc., which has issued a fairness opinion supporting 
the fairness of the sales price.  See "Risk Factors - The sale price for 
shares issued in this offering may be substantially lower than its market 
price."

The sale price for the stock is approximately a ______ percent (__%) 
discount to the average closing price of our stock for the period _________, 
1999 through _______ 1999.  The historical trading price of our stock for 
the first two quarters of fiscal year 1999 were as follows:


                                        Six Months Ended
                                         March 26, 1999  
 
                                        High        Low

                       1st Quarter     $ 8.500     $6.750
                       2nd Quarter     $21.000     $7.938


	

                                    OFFERING

The Rights 
Mechanical Technology is distributing, at no cost to the record holders of 
its outstanding stock as of June 4, 1999 ("Record Date") non-transferable 
rights to purchase additional shares of stock at a price of $____ per share 
("Exercise Price"). Mechanical Technology will distribute one non-
transferable right for each _____ (__) shares of stock held on the Record 
Date.  Each right will entitle its holder to purchase one share of stock.  
The rights will be evidenced by non-transferable subscription certificates. 
An aggregate of __________ shares of stock will be sold if all rights are 
exercised and Mechanical Technology does not issue up to _______ over-
allotment shares ("Over-Allotment Shares") and ________ shares of stock if 
rights for all Over-Allotment Shares are purchased.  The rights are non-
transferable unless the transferee of such rights provides Mechanical 
Technology with an opinion of counsel stating that such transfer is exempt 
from registration under the Federal Securities Act of 1933.

No fractional rights, or cash in lieu thereof, will be issued or paid. The 
number of rights distributed to each holder will be rounded up to the 
nearest whole share in connection with the exercise of Subscription 
Privileges.  

Subscription Privileges 
     Basic Subscription Privilege.  Each right will entitle the holder thereof 
to receive, upon payment of the Exercise Price, one share of stock. 
Certificates representing shares of stock purchased pursuant to the 
Subscription Privilege will be delivered to subscribers as soon as practical 
<PAGE>
after the Expiration Date, irrespective of whether the Subscription
Privilege is exercised immediately prior to the Expiration Date or earlier. 
Holders exercising their Subscription Privilege will not be shareholders of 
record with respect to the shares issuable pursuant to such Subscription 
Privilege until the closing, which it is anticipated will occur four 
business days after the Expiration Date.  

     Oversubscription Privilege.  Subject to the allocation described below, 
each right also carries the right to subscribe, at the Exercise Price, for 
any Underlying Shares not subscribed for through the exercise of Basic 
Subscription Privileges by other holders or the up to _______ additional 
Over-Allotment Shares which Mechanical Technology may offer if the offering 
is oversubscribed (the "Excess Shares").  If the Excess Shares are not 
sufficient to satisfy all subscriptions made pursuant to the 
Oversubscription Privilege, such Excess Shares will be allocated pro-rata 
(subject to the elimination of fractional shares) among those holders 
exercising the Oversubscription Privilege, in proportion, not to the number 
of shares requested pursuant to the Oversubscription Privilege, but to the 
number of shares each holder exercising the Oversubscription Privilege 
subscribed for pursuant to the Basic Subscription Privilege;  provided, 
however, that if such pro-rata allocation results in any holder being 
allocated a greater number of Excess Shares than such holder subscribed for 
pursuant to the exercise of such holder's Oversubscription Privilege, then 
such holder will be allocated only the number of Excess Shares for which 
such holder subscribed.  The remaining Excess Shares will be allocated among 
all other holders exercising the Oversubscription Privilege.  Only 
beneficial holders who exercise the Basic Subscription privilege in full 
will be entitled to exercise the Oversubscription Privilege.  Notification 
of the number of shares allocated pursuant to the Oversubscription Privilege 
will be delivered to subscribers as soon as practical after the Expiration 
Date and after all prorations have been effected.

     Exercise of Over-Allotment Shares.  If the Offering is oversubscribed, 
Mechanical Technology may, in its sole discretion, decide to issue up to an 
additional ______ shares.  Mechanical Technology will determine whether to 
issue Over-Allotment Shares after all subscriptions for shares have been 
received. No Over-Allotment Shares will be issued unless the Offering is 
oversubscribed. 

Expiration Date
The Rights will expire at 5:00 p.m., New York City time, on July 19, 1999 
(the "Expiration Date"), unless extended by Mechanical Technology from time
to time.  Notwithstanding the foregoing, the Expiration Date shall not be 
later than September 24, 1999, except that Mechanical Technology reserves 
the right to extend the exercise period on one or more occasions if the 
board of directors determines that the occurrence of a material event 
necessitates an amendment of the Registration Statement or recirculation of 
the prospectus that forms a part thereof in order to permit time for the 
distribution of such information. After the Expiration Date, unexercised 
rights will be null and void.  Mechanical Technology will not be obligated 
to honor any purported exercise of rights received by the Subscription Agent 
after the Expiration Date, regardless of when the documents relating to such 
exercise were sent, except pursuant to the Guaranteed Delivery Procedures 
described below.

Transferability of Rights
The Rights will not be registered and may not be transferred unless the 
transferee provides Mechanical Technology with an opinion of counsel, that 
is acceptable to Mechanical Technology, stating that such transfer is exempt 
from registration under the Federal Securities Act of 1933.

Commitments to Exercise Rights
First Albany Companies Inc. has informed the board of directors that they 
intend to exercise their full Basic Subscription Privilege. First Albany has 
also agreed to exercise its Oversubscription Privilege through First Albany 
Private Investment Fund 1999, LP, an affiliate. All members of Mechanical 
Technology's board of directors that have not sold shares within the last 
six months have informed Mechanical Technology that they will exercise their 
full Basic Subscription Privilege and may exercise their Oversubscription 
Privilege (First Albany and the board members exercising their rights are the 
"Purchasing Shareholders").  The Purchasing Shareholders currently own 
3,164,532 shares or approximately forty four (44%) of the outstanding stock 
of Mechanical Technology.  After exercise of the full Basic Subscription 
Privilege, the Purchasing Shareholders will own __________ shares or 
approximately __________ percent (__%) of the outstanding stock, assuming no 
other stockholders exercise their Basic Subscription Privilege. If the 
Purchasing Shareholders exercise their full Oversubscription Privilege, the 
Purchasing Shareholders will own _______ shares or approximately _____ 
percent (____%) of the outstanding stock of Mechanical Technology, assuming 
<PAGE>
all other stockholders exercise their Basic Subscription Privilege but do
not exercise their Oversubscription Privilege, and assuming there are no 
Over-Allotment Shares.

Exercise of Rights
Rights may be exercised by delivering to the Subscription Agent, on or prior 
to 5:00 p.m., New York City time, on the Expiration Date, the properly 
completed and executed Subscription Certificate evidencing such rights with 
any required signatures, together with payment in full of the Exercise Price 
for each Underlying Share subscribed for pursuant to the Subscription 
Privileges (except as permitted pursuant to clause (iii) of the next 
sentence).  Such payment in full must be by: (i) check or bank draft drawn 
upon a U.S. bank or postal money order, payable to American Stock Transfer & 
Trust Company, as Subscription Agent; (ii) wire transfer of funds to the 
account maintained by the Subscription Agent for such purpose; or (iii) in 
such other manner as Mechanical Technology may approve in writing in the 
case of persons acquiring Underlying Shares at an aggregate Exercise Price 
of $500,000 or more (the payment method under (iii) being an "Approved 
Payment Method"), provided in each case that the full amount of such 
Exercise Price is received by the Subscription Agent in currently available 
funds within three NASDAQ National Market trading days following the 
Expiration Date.  Payment of the Exercise Price will be deemed to have been 
received by the Subscription Agent only upon (a) clearance of any 
uncertified check, (b) receipt by the Subscription Agent of any certified 
check or bank draft drawn upon a United States bank or of any postal money 
order, (c) receipt of good funds in the Subscription Agent's account 
designated above, or (d) receipt of good funds by the Subscription Agent 
through an Approved Payment Method.

If paying by uncertified personal check, please note that the funds paid 
thereby may take at least five business days to clear.  Accordingly, holders 
who wish to pay the Exercise Price by means of an uncertified personal check 
are urged to make payment sufficiently in advance of the Expiration Date to 
ensure that such payment is received and clears by such date and are urged 
to consider payment by means of certified or bank cashier's check, money 
order or wire transfer of funds.

The address to which the Subscription Certificates and payment of the 
Exercise Price should be delivered is:

     American Stock Transfer & Trust Company
     40 Wall Street
     New York, New York 10005

If a holder wishes to exercise rights, but time will not permit such holder 
to cause the Subscription Certificate or Subscription Certificates 
evidencing such rights to reach the Subscription Agent on or prior to the 
Expiration Date, such rights may nevertheless be exercised if all of the 
following conditions (the "Guaranteed Delivery Procedures") are met:

(i)	such holder has caused payment in full of the Exercise Price for 
each Underlying Share being subscribed for pursuant to the 
Subscription Privileges to be received (in the manner set forth 
above) by the Subscription Agent on or prior to the Expiration 
Date;

(ii)    the Subscription Agent receives, on or prior to the Expiration 
Date, a guaranteed notice (a "Notice of Guaranteed Delivery"), 
substantially in the form provided with the Instructions for 
Subscription Certificate (the "Instructions") distributed with the
Subscription Certificates, from an "Eligible Institution" (as 
defined in Rule 17Ad-15 under the Securities Exchange Act of 1934), 
stating the number of rights represented by the Subscription 
Certificate(s) held by such exercising holder, the number of 
Underlying Shares being subscribed for pursuant to the Subscription 
Privileges and guaranteeing the delivery to the Subscription Agent 
of any Subscription Certificate(s) evidencing such rights within 
three NASDAQ National Market trading days following the date of the 
Notice of Guaranteed Delivery; and

(iii)	the properly completed Subscription Certificate(s), with any 
required signatures, is received by the Subscription Agent within 
three NASDAQ National Market trading days following the date of 
the Notice of Guaranteed Delivery relating thereto.  The Notice of 
Guaranteed Delivery may be delivered to the Subscription Agent in 
the same manner as Subscription Certificate(s) at the address set 
forth above, or may be transmitted to the Subscription Agent by 
facsimile transmission (telecopy number (718) 234-5001).  
Additional copies of the form of Notice of Guaranteed Delivery are 
<PAGE>
available upon request from the Subscription Agent, whose address
and telephone number are set forth under "Subscription Agent" 
below.

Funds received in payment of the Exercise Price for Excess Shares subscribed 
for pursuant to the Oversubscription Privilege will be held in a segregated 
account pending issuance of such Excess Shares.  If a holder exercising the 
Oversubscription Privilege is allocated less than all of the Excess Shares 
that such Holder wished to subscribe for pursuant to the Oversubscription 
Privilege, the excess funds paid by such holder in respect of the Exercise 
Price for shares not issued shall be returned by mail without interest or 
deduction as soon as practical after the Expiration Date.

Exercise of Rights Through Third Parties
A holder who holds shares of stock for the account of others, such as a 
broker, a trustee or a depositary for securities, should notify the 
respective beneficial owners of such shares as soon as possible to ascertain 
such beneficial owners' intentions and to obtain timely instructions with 
respect to the rights. If the beneficial owner so instructs, the record 
holder of such rights shall complete the Subscription Certificate and submit 
it to the Subscription Agent with the proper payment.  In addition, the 
beneficial owner of stock or rights held through such a holder of record 
should contact the holder and make a timely request that the holder effect 
transactions in accordance with the beneficial owner's instructions.  

Over/Underpayment of Exercise Price
If either the number of Underlying Shares being subscribed for pursuant to 
the Basic Subscription Privilege is not specified on the Subscription 
Certificate, or the amount of funds delivered is not enough to pay the 
Exercise Price for all Underlying Shares stated to be subscribed for, the 
number of Underlying Shares subscribed for will be assumed to be the maximum 
amount that could be subscribed for upon payment of such amount.  If the 
number of Underlying Shares being subscribed for is not specified, or 
payment of the Exercise Price for the indicated number of rights that are 
being exercised exceeds the required Exercise Price, the payment will be 
applied, until depleted, to subscribe for Underlying Shares in the following 
order: (i) to subscribe for the number of Underlying Shares indicated, if 
any, pursuant to the Basic Subscription Privilege; (ii) to subscribe for 
Underlying Shares until the Basic Subscription Privilege has been fully 
exercised with respect to all of the rights represented by the Subscription 
Certificate; and (iii) to subscribe for additional Underlying Shares 
pursuant to the Oversubscription Privilege (subject to any applicable 
proration).

Delivery of Subscription Certificates
The Instructions accompanying the Subscription Certificates should be read 
carefully and followed in detail.  

PLEASE SEND ALL SUBSCRIPTION CERTIFICATES TO THE SUBSCRIPTION AGENT.  DO NOT 
SEND SUBSCRIPTION CERTIFICATES TO MECHANICAL TECHNOLOGY INCORPORATED.

The method of delivery of subscription certificates and payment of the 
Exercise Price to the Subscription Agent will be at the election and risk of 
the rights holder, but if sent by mail it is recommended that such 
certificates and payments be sent by registered mail, properly insured, with 
return receipt requested, and that a sufficient number of days be allowed to 
ensure delivery to the Subscription Agent and clearance of payment prior to 
5:00 p.m., New York City time, on the Expiration Date.  Because uncertified 
personal checks may take at least five business days to clear, the rights 
holder is strongly urged to pay, or arrange for payment, by means of 
certified or bank cashier's check, money order or wire transfer of funds.

Any questions or requests for assistance concerning the method of exercising 
rights or requests for additional copies of this prospectus, or the Notice 
of Guaranteed Delivery should be directed to the Subscription Agent at 
telephone number (718) 921-8200, or Mechanical Technology at telephone 
number (518) 785-2211.

No Revocation
Once a rights holder has exercised the Basic Subscription Privilege or the 
Oversubscription Privilege, such exercise may not be revoked.

Subscription Agent
Mechanical Technology has appointed American Stock Transfer & Trust Company 
as Subscription Agent for the Offering.  The Subscription Agent's address, 
which is the address to which the Subscription Certificates and payment of 
the Exercise Price should be delivered, as well as the address to which 
Notice of Guaranteed Delivery must be delivered, and the Subscription 
Agent's telephone number and facsimile number, are:
<PAGE>

     American Stock Transfer & Trust Company
     40 Wall Street
     New York, NY 10005
     Telephone No.  (718) 921-8200
     Telecopier No. (718) 234-5001

Mechanical Technology will pay the fees and expenses of the Subscription 
Agent, and has also agreed to indemnify it from any liability that it may 
incur in connection with the offering.


                     WHERE YOU CAN FIND MORE INFORMATION

Mechanical Technology Incorporated is subject to the information 
requirements of the Securities Exchange Act of 1934 (the "Exchange Act") and 
files reports and other information with the Securities and Exchange 
Commission ("SEC").  You may read and copy information concerning Mechanical 
Technology at the Public Reference Room of the SEC in Washington, D.C., at 
450 Fifth Street, N.W., Washington, D.C., and at its regional offices at 1 
World Trade Center, Suite 1300, New York, New York 10048 and 500 W. Madison 
Street, Suite 1400, Chicago, Illinois 60661.  Please call the SEC at 1-800-
SEC-0330 to get information on the operation of the public reference rooms. 
You may also receive copies of documents from the SEC upon payment of a 
duplicating fee, by writing to the SEC's Public Reference Section, located 
at 450 Fifth Street, N.W., Washington, D.C. 20549.  You can also download 
information concerning Mechanical Technology from the SEC's website at 
http://www.sec.gov.

Mechanical Technology filed a registration statement with the SEC for the 
shares of stock we are offering.  Pursuant to SEC rules and regulations, 
this prospectus does not contain all of the information that you can find in 
the registration statement.  You can read and copy the information in the 
registration statement in the same way that you read and copy any other 
information filed by Mechanical Technology with the SEC.

Copies of Mechanical Technology's Form 10-K for the year ended September 30, 
1998 and Form 10-Q Report for the quarter ended March 26, 1999 accompany this 
Prospectus. Statements in this prospectus concerning those documents and any 
document filed as an exhibit to the registration statement are not necessarily 
complete.  Each of those statements is qualified in its entirety by reference 
to the complete document.  The exhibits to the prospectus, filed with the SEC, 
may be inspected, copied, and obtained by mail from the SEC as set forth above. 
These documents will also be available for inspection and copying at the 
principal executive offices of Mechanical Technology Incorporated, located at 
968 Albany-Shaker Road, Latham, New York 12210, during regular business hours 
by any interested shareholder, or his or her duly authorized representative, 
so designated in writing.

The SEC allows us to "incorporate by reference" information into this document, 
which means we can disclose important information to you by referring you to 
another document filed separately with the SEC.  The information incorporated 
by reference is deemed to be a part of this document, except for any 
information superceded by information in this document.  The information 
incorporated by reference is an important part of this prospectus.  
Incorporated documents contain important information about Mechanical 
Technology and its finances.  This prospectus incorporates the following 
documents by reference into this prospectus:

* Mechanical Technology's Annual Report on Form 10-K for its fiscal year 
ended September 30, 1998; 
* Mechanical Technology's Quarterly Report on Form 10-Q for its quarter 
ended March 26, 1999;
* Mechanical Technology's four Reports on Form 8-K dated February 10, 1999, 
February 12, 1999, March 29, 1999 and April 13, 1999. 

You may obtain any documents incorporated by reference in this document, 
other than exhibits, either from the SEC, as set forth above, or from 
Mechanical Technology by writing to Cynthia Scheuer at Mechanical Technology 
Incorporated at 968 Albany-Shaker Road, Latham, New York 12210, or by 
telephone at (518)785-2211.  

You should rely only on the information contained in this document or the 
information incorporated by reference to which you have previously been 
referred. We have not authorized anyone to provide you with information that 
differs from such information.  We are not making an offer of securities in 
any state where the offer is not permitted.  You should not assume that the 
information in this prospectus or any prospectus supplement is accurate as 
of any date other than the date on the front of those documents.
<PAGE>

                     FEDERAL INCOME TAX CONSEQUENCES
	
Because of the complexity of the provisions of the Internal Revenue Code of 
1986, as amended (the "Code") and because tax consequences may vary 
depending upon the particular facts relating to each holder of Mechanical 
Technology stock, such holders should consult their own tax advisors 
concerning their individual tax situations and the tax consequences of this 
Offering under the Code and under any applicable state, local or foreign tax 
laws.

                          PLAN OF DISTRIBUTION

The stock offered by Mechanical Technology is being offered through the 
issuance of rights directly to its shareholders of record on June 4, 1999.  
Certain employees, officers or directors of Mechanical Technology may 
solicit responses from you, but such individuals will not receive any 
commissions or compensation for such services other than their normal 
employment compensation.

We intend to distribute rights and copies of this prospectus to shareholders 
of record on June 4, 1999, as soon as the Registration Statement, of which 
this prospectus is a part, becomes effective with the Securities and 
Exchange Commission.

Shareholders who want to subscribe for the purchase of shares of stock in 
the offering are urged to complete, date and sign the Subscription 
Certificate and return it to the subscription agent on or before the date 
this offer expires, together with payment in full for any shares purchased. 
See "Offering - Exercise of Rights" and "Offering - Exercise of Rights 
Through Third Parties."

                   DESCRIPTION OF SECURITIES TO BE REGISTERED

The authorized capital stock of Mechanical Technology includes 15 million 
shares of stock, par value $1.00 per share. Mechanical Technology is 
registering _________ shares of stock in connection with the offering.  The 
outstanding shares of stock are fully paid and non-assessable.  Holders of 
stock are entitled to dividends when, as and if declared by the board of 
directors of Mechanical Technology out of any funds legally available to 
Mechanical Technology for that purpose.

We have never paid cash dividends on our stock and do not anticipate we will 
be doing so in the foreseeable future.

Holders of stock are entitled to one vote per share held of record with 
respect to all matters submitted to a vote of the shareholders.  There is no 
cumulative voting for the election of directors, who are elected for 
staggered three-year terms.

At March 26, 1999, the approximate number of holders of record of Mechanical 
Technology stock was 1,874.
	
                            LEGAL MATTERS

Certain legal matters with respect to the validity of the rights and the 
shares to be issued upon exercise of the rights have been passed upon for 
Mechanical Technology by Catherine S. Hill, PLLC, Troy, New York.

                               EXPERTS

The financial statements incorporated in this registration statement by 
reference to the Annual Report on Form 10-K for the year-ended September 30, 
1998, have been incorporated in reliance on the report of 
PricewaterhouseCoopers LLP, independent accountants, given on the authority 
of said firm as experts in auditing and accounting.

The sale price for the shares was determined by the board of directors based 
on the advice of the independent Consulting and Investment Banking firm of 
Schwartz Heslin Group, Inc.  Schwartz Heslin Group, Inc. has also issued a 
fairness opinion attesting to the fairness of $_____ as the sale price for 
the shares.  Mechanical Technology will pay fees and expenses of Schwartz 
Heslin Group, Inc., and has also agreed to indemnify it from certain 
liabilities it may incur in connection with the offering.





<PAGE>

                  MECHANICAL TECHNOLOGY INCORPORATED
             Cross-Reference Sheet to Prospectus on Form S-2
           Furnished Pursuant to Item 501(b) of Regulation S-K



Item Form S-2 Caption                Location in Prospectus          Page

1. Forepart of the Registration      Outside Front Cover Page                 
   Statement and Outside Front
   Cover Page of Prospectus

2. Inside Front and Outside Back     Inside Front Cover Page
   Cover Pages of Prospectus         Outside Back Cover Pages

3. Summary Information and           Prospectus Summary; Risk Factors
   Risk Factors                                                  

4. Use of Proceeds                   Use of Proceeds

5. Determination of Exercise Price   How We Determined the Sale Price for 
   the Stock

6. Dilution                         Risk Factors - This offering will 
                                    result in dilution for current 
                                    shareholders and may result in a 
                                    decrease in Mechanical Technology's 
                                    stock price

7. Selling Securityholders          Not Applicable

8. Plan of Distribution             Plan of Distribution

9. Description of Securities        Description of Securities to be
   to be registered                 Registered;  Risk Factors --
                                    Mechanical Technology will issue an 
                                    additional _____ shares of stock in 
                                    this offering; Offering

10.Interests of Named Experts       Legal Matters; Experts
   and Counsel 

11.Information with Respect to      Form 10-K for the fiscal year 
   Registrant                       ended September 30, 1998, 
                                    Form 10-Q for the quarter ended March 
                                    26, 1999, appended hereto

12.Incorporation of Certain         Where You Can Find More Information
Information by Reference





























<PAGE>
                                PART II

               INFORMATION NOT REQUIRED IN THE PROSPECTUS


Item 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

SEC Registration Fee                                          $  3,336  
Printing                                                         8,000*
Legal fees and Expenses                                         45,000*
Accounting Fees and Expenses                                    25,000*
Pricing and Fairness Opinion and Expenses                       30,000*
Stock Transfer Fees                                             35,000*
Estimated Mailing Costs                                         12,513*
Miscellaneous other costs                                       11,151*

      Total                                                   $170,000*

*Estimated	


Item 15.  	INDEMNIFICATION OF DIRECTORS AND OFFICERS --
        DISCLOSURE OF COMMISSION'S POSITION ON INDEMNIFICATION

Under provisions of Mechanical Technology's Amended and Restated Certificate 
of Incorporation, Mechanical Technology shall indemnify any person who was 
or is a party or is threatened to be made a party to any threatened, pending 
or completed action, proceeding or suit (including one by or in the right of 
Mechanical Technology to procure a judgment in its favor), whether civil or 
criminal, by reason of the fact that he, his testator or intestate is or was 
a director or officer of Mechanical Technology, or is or was serving any 
other corporation, partnership, joint venture, trust, employee benefit plan 
or other enterprise in any capacity at the request of Mechanical Technology, 
against judgments, fines, amounts paid in settlement and expenses, including 
attorneys' fees, actually incurred as a result of or in connection with any 
such action, proceeding or suit, or any appeal therefrom, if such director 
or officer acted in good faith for a purpose which he reasonably believed to 
be in or not opposed to the best interests of Mechanical Technology, and, in 
criminal actions or proceedings, in which he had no reasonable cause to 
believe that his conduct was unlawful; provided, however, that no 
indemnification shall be made to or on behalf of any director or officer if 
a judgment or other final adjudication adverse to the director or officer 
establishes that his acts were committed in bad faith or were the result of 
active and deliberate dishonesty and were material to the cause of action so 
adjudicated, or that he personally gained a financial profit or other 
advantage to which he was not legally entitled.

Insofar as the indemnification for liabilities arising under the Securities 
Act of 1933 may be permitted to directors, officers or persons controlling 
Mechanical Technology pursuant to the foregoing provisions, Mechanical 
Technology has been informed that in the opinion of the SEC such 
indemnification is against public policy as expressed in the Securities Act 
of 1933 and is therefore unenforceable.




Item 16.  EXHIBIT INDEX

The Exhibit Index has been included immediately preceding the exhibits to 
this registration statement.
											
Item 17.  UNDERTAKINGS

The undersigned Company hereby undertakes that, for purposes of determining 
any liability under the Securities Act of 1933, each filing of the 
registrant's annual report pursuant to Section 13(a) or Section 15(d) of the 
Securities Exchange Act of 1934 (and, where applicable, each filing of an 
employee benefit plan's annual report pursuant to Section 15(d) of the 
Securities Exchange Act of 1934) that is incorporated by reference in the 
registration statement shall be deemed to be a new registration statement 
relating to the securities offered therein, and the offering of such 
securities at that time shall be deemed to be the initial bona fide offering 
thereof.

The undersigned registrant hereby undertakes to deliver or cause to be 
delivered with the prospectus, to each person to whom the prospectus is sent 
or given, the latest annual report to security holders that is incorporated 
by reference in the prospectus and furnished pursuant to, and meeting the 
<PAGE>
requirements of, Rule 14a-3 or Rule 14c-3 under the Securities Exchange Act
of 1934; and, where interim financial information required to be presented 
by Article 3 of Regulation S-X are not set forth in the prospectus, to 
deliver, or cause to be delivered to each person to whom the prospectus is 
sent or given, the latest quarterly report that is specifically incorporated 
by reference in the prospectus to provide such interim financial 
information.

                                SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, Mechanical 
echnology Incorporated certifies that it has reasonable grounds to believe 
that it meets all of the requirements for filing on Form S-2 and has duly 
caused this registration statement to be signed on its behalf by the 
undersigned, thereunto duly authorized, in the City of Albany, State of New 
York on May 18, 1999.


MECHANICAL TECHNOLOGY, INCORPORATED

By: /s/ George C. McNamee						
    George C. McNamee 
    Chief Executive Officer



KNOWN ALL MEN BY THESE PRESENTS, that each person whose signature appears 
below constitutes and appoints Cynthia A. Scheuer and George C. McNamee his 
true and lawful attorneys-in-fact and agents, each acting alone, with full 
power of substitution and resubstitution, for him and in his name, place and 
stead, in any and all capacities, to sign any or all amendments to this 
Registration Statement, including post-effective amendments, and to file the 
same, with all exhibits thereto, and all documents in connection therewith, 
with the Securities and Exchange Commission, granting unto said attorneys-
in-fact and agents, and each of them, full power and authority to do and 
perform each and every act and thing requisite and necessary to be done in 
and about the premises, as fully to all intents and purposes as he might or 
could do in person, and hereby ratifies and confirms all that said 
attorneys-in-fact and agents, each acting alone, or their substitute or 
substitutes, may lawfully do or cause to be done by virtue hereof.







































<PAGE>
Pursuant to the requirements of the Securities Act of 1933, this 
registration statement has been signed by the following persons in the 
capacities and on the dates indicated.


SIGNATURE																	DATE

/s/ George C. McNamee                                  05/18/99 
George C. McNamee				
Chief Executive Officer and Director
(Principal Executive Officer)

/s/ Cynthia A. Scheuer                                     "
Cynthia A. Scheuer				
Chief Financial Officer (Principal
Financial and Accounting Officer)

/s/ Dale W. Church                                         "
Dale W. Church				
Director

/s/ Edward A. Dohring                                      "
Edward A. Dohring				
Director

/s/ Alan P. Goldberg                                       "
Alan P. Goldberg				
Director

/s/ E. Dennis O'Connor                                     "
E. Dennis O'Connor                       
Director

/s/ Walter L. Robb                                         "
Dr. Walter L. Robb				
Director

/s/ Beno Sternlicht                                        "
Dr. Beno Sternlicht				
Director

                Exhibit Table

5.1             Form of Opinion re legality.

10.14           Mechanical Technology Incorporated Stock 
                Incentive Plan - included as Appendix A to the 
                registrant's Proxy Statement, filed pursuant 
                to Regulation 14A, for its December 20, 1996 
                Special Meeting of Shareholders. (1)

10.17           Agreement, dated March 14, 1997, between the 
                Registrant and Mr. James Clemens, Vice 
                President and General Manager of Ling 
                Electronic, Inc., regarding his employment. 
                (2)

10.18		Limited Liability Company Agreement of Plug 
                Power,   L.L.C., dated June 27, 1997, between 
                Edison Development Corporation and Mechanical 
                Technology, Incorporated. (3) (4)

10.19           Contribution Agreement, dated June 27, 1997, 
                between Mechanical Technology, Incorporated 
                and Plug Power, L.L.C. (3) (4)

10.20           Asset Purchase Agreement, dated as of 
                September 22, 1997, between Mechanical 
                Technology, Incorporated and Noonan Machine 
                Company. (3) 

10.21         	Asset Purchase Agreement between Mechanical 
                Technology and NYFM, Incorporated, dated as of 
                March 31, 1998. (5) 

10.22           Option Agreement-Contribution Match between 
                Plug Power, L.L.C. and Mechanical Technology, 
                dated as of April 24, 1998. (5) 
	
<PAGE>
10.23           Option Agreement-Contribution Match between
                Plug Power, L.L.C. and Mechanical Technology, 
                dated as of June 45, 1998. (5) 

10.24           Contribution Agreement between Edison 
                Development Corporation and Mechanical 
                Technology, dated as of June 40, 1998. (5) 
	
10.29           Mechanical Technology, Incorporated/Plug 
                Power, L.L.C. Lease for Building III. (6) 

10.30           Mechanical Technology Incorporated 1999 
                Employee Stock Incentive Plan.  (7)

13.1            Form 10-Q Quarterly Report for the Quarter Ended 
                March 26, 1999. (8)

23.1            Form of Consent of PricewaterhouseCoopers LLP

23.2            Form of Consent of Catherine S. Hill, PLLC 
												(included in Form of Opinion in Exhibit 5.1)
24              Power of Attorney (included on signature page)

______________________

Certain exhibits were previously filed (as indicated below) and are 
incorporated herein by reference.  All other exhibits for which no 
other filing information is given are filed herewith:

(1) Filed as an Exhibit (bearing the same exhibit number) to the 
registrant's Form 10-K Report for its fiscal year ended September 30, 
1996.

(2) Filed as an Exhibit (bearing the same exhibit number) to the 
registrant's Form 8-K Report dated May 12, 1997.

(3) Filed as an Exhibit (bearing the same exhibit number) to the 
registrant's Form 10-K Report for the fiscal year ended September 
30, 1997.

(4) Refiled as an Exhibit (bearing the same exhibit number) to the 
Registrant's Form S-2 dated August 18, 1998, after confidential 
treatment request with respect to certain schedules and exhibits was 
denied by the Commission. Confidential treatment with respect to 
certain schedules and exhibits was granted.

(5) Filed as an Exhibit (bearing the same exhibit number) to the 
registrant's Form S-2 dated August 18, 1998.

(6) Filed as an Exhibit (bearing the same exhibit number) to the 
registrant's Report on Form 10-Q for the period ended June 26, 1998.

(7) Filed as an Exhibit to the registrant's Proxy Statement, 
Schedule 14A, dated February 12, 1999. 

(8) Filed with the Securities and Exchange Commission as of May 10, 
1999.


























                                                       Exhibit No. 5.1

                              

                  Form of Opinion As to Legality of Shares






							May 17, 1999




Mechanical Technology, Incorporated
968 Albany-Shaker Road 
Latham, New York 12110

	RE:	Rights Offering Pursuant to Form S-2

Ladies and Gentlemen:

	We have acted as counsel to Mechanical Technology Incorporated (the 
"Company"), a New York corporation, pursuant to a Registration Statement on 
Form S-2, as filed with the Securities and Exchange Commission on May 17, 1999 
(the "Registration Statement"), covering ________ shares of the Company's $1.00 
par value Common Stock (the "Securities").

	In acting as counsel for the Company and arriving at the opinions as 
expressed below, we have examined and relied upon originals or copies, 
certified or otherwise identified to our satisfaction, of such records of the 
Company, resolutions of the Board of Directors of the Company, agreements and 
other instruments, certificates of officers, and representatives of the 
Company, certificates of public officials and other documents as we have deemed 
necessary or appropriate as a basis for the opinions expressed herein.

	In connection with our examination we have assumed the genuineness of
all signatures, the authenticity of all documents tendered to us as originals,
the legal capacity of natural persons and the conformity to original documents
of all documents submitted to us as certified or photostatic copies.


	Based on the foregoing, and subject to the qualifications and
        limitations set forth herein, it is our opinion that:

1.	The Company has the authority to issue the Securities in the manner 
and under the terms set forth in the Registration Statement.

2.	The Securities have been duly authorized by the Company and when 
issued, delivered and paid for in accordance with their respective 
terms, will be validly issued, fully paid and non-assessable.

	We express no opinion with respect to the laws other than those of the 
state of New York and Federal Laws of the United States of America, and we 
assume no responsibility as to the applicability thereto, the effect thereon, 
of the laws of any other jurisdiction.

	We hereby consent to the filing of this opinion as Exhibit 5.1 to the 
Registration Statement and its use as part of the Registration Statement.

	We are furnishing this opinion to the Company solely for its benefit in 
connection with the Registration Statement.  It is not to be used, circulated, 
quoted or otherwise relied upon for any other purpose.


	
						Very truly yours,



						Catherine S. Hill, PLLC



















		




































					



                                                          Exhibit No. 23.1




                       CONSENT OF INDEPENDENT ACCOUNTANTS


We hereby consent to the incorporation by reference in this Registration
Statement on Form S-2 of our report dated November 6, 1998 relating to the
financial statements, which appears in Mechanical Technology Incorporated and
Subsidiaries Annual Report on Form 10-K for the year ended September 30, 1998.
We also consent to the incorporation by reference of our report dated
November 6, 1998 relating to the financial statement schedules, which appears
in such Annual Report on Form 10-K.  We also consent to the references to us
under the headings "Experts" and "Summary Consolidated Financial Information"
in such Registration Statement.



Albany, New York				
May 17, 1999                                     PRICEWATERHOUSECOOPERS L.L.P.






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