HEMAGEN DIAGNOSTICS INC
8-A12G, 1999-02-10
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                     SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, DC  20549
                            --------------------


                                  FORM 8-A

              FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                  PURSUANT TO SECTION 12(b) OR 12(g) OF THE
                       SECURITIES EXCHANGE ACT OF 1934
                            --------------------


                          HEMAGEN DIAGNOSTICS, INC.
                          -------------------------
           (Exact Name of Registrant as Specified in Its Charter)


       DELAWARE                                   04-2869857
       --------                                   ----------
(State of Incorporation                        (I.R.S. Employer
    or Organization)                          Identification No.)


     40 Bear Hill Road, Waltham, MA                   02451
     ------------------------------                   -----
(Address of Principal Executive Offices)            (Zip Code)


         If this form relates to the registration of a class of securities 
         pursuant to Section 12(b) of the Exchange Act and is effective 
         pursuant to General Instruction A.(c), please check the following 
         box.  [ ]

         If this form relates to the registration of a class of securities 
         pursuant to Section 12(g) of the Exchange Act and is effective 
         pursuant to General Instruction A.(d), please check the following 
         box.  [ ]

Securities Act registration statement file number to which this form 
relates:____

Securities to be registered pursuant to Section 12(b) of the Act:

      Title of Each Class     Name of Each Exchange on Which
      To be so Registered     Each Class is to be Registered
      -------------------     ------------------------------

             NONE                          NONE


Securities to be registered pursuant to Section 12(g) of the Act:


                        Common Share Purchase Rights
                        ----------------------------
                              (Title of Class)


Item 1.  Description of Registrant's Securities to be Registered.

      On January 27, 1999, the Board of Directors of Hemagen Diagnostics, 
Inc. (the "Company") declared a dividend distribution of one common share 
purchase right (a "Right") for each outstanding share of common stock, par 
value $0.01 per share (the "Common Shares"), of the Company.  The dividend 
is payable on February 10, 1999 (the "Record Date") to the stockholders of 
record on that date.  Except as described below, each Right, when 
exercisable, entitles the registered holder to purchase from the Company one 
Common Share of the Company at a price of $4.00 per Common Share (the 
"Purchase Price"), subject to adjustment.  The description and terms of the 
Rights are set forth in a Rights Agreement (the "Rights Agreement") between 
the Company and Continental Stock Transfer & Trust Company, as Rights Agent 
(the "Rights Agent").

      Initially, the Rights will be attached to all certificates 
representing Common Shares then outstanding, and no separate Rights 
certificates will be distributed.  Until the earlier to occur of (i) 10 
business days following a public announcement that a person or group of 
affiliated or associated persons (an "Acquiring Person") have acquired 
beneficial ownership of 15% or more of the outstanding Common Shares (the 
date of such an announcement being a "Shares Acquisition Date"), or (ii) 10 
business days (or such later date as may be determined by action of the 
Board of Directors prior to such time as any Person becomes an Acquiring 
Person) following the commencement of, or announcement of an intention to 
make, a tender offer or exchange offer the consummation of which would 
result in the beneficial ownership by a person or group of 15% or more of 
such outstanding Common Shares, the Rights will be evidenced, with respect 
to any of the Common Share certificates outstanding as of the Record Date, 
by such Common Share certificates together with a copy of this Summary of 
Rights.

      The Rights Agreement provides that, until the Distribution Date, the 
Rights will be transferred with and only with the Common Shares.  Until the 
Distribution Date (or earlier redemption or expiration of the Rights), new 
Common Share certificates issued after the Record Date upon transfer or new 
issuance of Common Shares will contain a notation incorporating the Rights 
Agreement by reference.  Until the Distribution Date (or earlier redemption 
or expiration of the Rights), the surrender for transfer of any certificates 
for Common Shares outstanding as of the Record Date, even without such 
notation or a copy of this Summary of Rights being attached thereto, will 
also constitute the transfer of the Rights associated with the Common Shares 
represented by such certificate.  As soon as practicable following the 
Distribution Date, separate certificates evidencing the Rights ("Rights 
Certificates") will be mailed to holders of record of the Common Shares as 
of the close of business on the Distribution Date, and the separate Rights 
Certificates alone will evidence the Rights.

      The Rights are not exercisable until the Distribution Date.  The 
Rights will expire on January 27, 2009 (the "Final Expiration Date"), unless 
the Rights are earlier redeemed by the Company, as described below.

      The Purchase Price payable, and the number of Common Shares or other 
securities or property issuable, upon exercise of the Rights are subject to 
adjustment from time to time to prevent dilution (i) in the event of a stock 
dividend on, or a subdivision, combination or reclassification of, the 
Common Shares, (ii) upon the grant to holders of the Common Shares of 
certain rights or warrants to subscribe for or purchase Common Shares at a 
price, or securities convertible into Common Shares with a conversion price, 
less than the then current market price of the Common Shares or (iii) upon 
the distribution to holders of the Common Shares of evidences of 
indebtedness or assets (excluding regular periodic cash dividends paid out 
of earnings or retained earnings or dividends payable in Common Shares) or 
of subscription rights or warrants (other than those referred to above).

      The number of outstanding Rights and the number of Common Shares 
issuable upon exercise of each Right are also subject to adjustment in the 
event of a stock split of the Common Shares or a stock dividend on the 
Common Shares payable in Common Shares or subdivisions, consolidations or 
combinations of the Common Shares occurring, in any such case, prior to the 
Distribution Date.

      Common Shares purchasable upon exercise of the Rights will not be 
redeemable.

      In the event that, after the first date of public announcement by the 
Company or an Acquiring Person that an Acquiring Person has become such, the 
Company is involved in a merger or other business combination transaction in 
which the Common Shares are exchanged or changed, or 50% or more of the 
Company's consolidated assets or earning power are sold (in one transaction 
or a series of transactions), proper provision will be made so that each 
holder of a Right (other than an Acquiring Person) will thereafter have the 
right to receive, upon the exercise thereof at the then current exercise 
price of the Right, that number of shares of common stock of the acquiring 
company (or, in the event there is more than one acquiring company, the 
acquiring company receiving the greatest portion of the assets or earning 
power transferred) which at the time of such transaction would have a market 
value of two times the exercise price of the Right.

      In the event that any person becomes an Acquiring Person, each holder 
of a Right will thereafter have the right to receive upon exercise that 
number of Common Shares having a market value of two times the exercise 
price of the Right.  Upon occurrence of any of the events described in the 
immediately preceding sentence, any Rights that are, or (under certain 
circumstances specified in the Rights Agreement) were, beneficially owned by 
any Acquiring Person shall immediately become null and void.

      At any time after the occurrence of any such event and prior to the 
acquisition by such person or group of 50% or more of the outstanding Common 
Shares, the Board of Directors may exchange the Rights (other than Rights 
owned by such person or group which have become void), in whole or in part, 
at an exchange ratio of one Common Share per Right (subject to adjustment).

      With certain exceptions, no adjustment in the Purchase Price will be 
required until cumulative adjustments require an adjustment of at least 1% 
in such Purchase Price.  No fractional Common Shares will be issued and in 
lieu thereof, an adjustment in cash will be made based on the market price 
of the Common Shares on the last trading day prior to the date of exercise.

      At any time prior to the earlier of (i) the tenth day after a Shares 
Acquisition Date, or (ii) the expiration of the Rights, the Board of 
Directors may redeem the Rights in whole, but not in part, at a price of 
$.001 per Right (the "Redemption Price"). The redemption of the Rights may 
be made effective at such time on such basis and with such conditions as the 
Board of Directors in its sole discretion may establish.  Immediately upon 
any redemption of the Rights, the right to exercise the Rights will 
terminate and the only right of the holders of Rights will be to receive the 
Redemption Price.

      Other than those provisions relating to the principal economic terms 
of the Rights, any of the provisions of the Rights Agreement may be amended 
by the Board of Directors of the Company prior to the Distribution Date.  
After the Distribution Date, the provisions of the Rights Agreement may be 
amended by the Board in order to cure any ambiguity, to make changes that do 
not adversely affect the interests of holders of Rights (excluding the 
interests of any Acquiring Person), or to shorten or lengthen any time 
period under the Rights Agreement; provided, however, that no amendment to 
adjust the time period governing redemption shall be made at such time as 
the Rights are not redeemable.

      Until a Right is exercised, the holder thereof, as such, will have no 
rights as a stockholder of the Company, including, without limitation, the 
right to vote or to receive dividends.

      The Rights have certain anti-takeover effects.  The Rights will cause 
substantial dilution to a person or group that attempts to acquire the 
Company on terms not approved by the Company's Board of Directors.  The 
Rights should not interfere with any merger or other business combination 
approved by the Board of Directors since the Rights may be redeemed by the 
Company at $.001 per Right prior to the time that a person or group has 
acquired beneficial ownership of 15% or more of the Common Shares.

      The form of Rights Agreement between the Company and the Rights Agent 
specifying the terms of the Rights, which includes as Exhibit A the form of 
Rights Certificate, is attached hereto as an exhibit and incorporated herein 
by reference.  The foregoing description of the Rights does not purport to 
be complete and is qualified in its entirety by reference to the Rights 
Agreement.


Item 2.  Exhibits.

      1.  Rights Agreement (including Form of Rights Certificate as Exhibit 
A thereto and the Summary of Rights to Purchase Common Shares as Exhibit B 
thereto), dated as of January 27, 1999, between the Company and Continental 
Stock Transfer & Trust Company, Rights Agent.

      2.  Press Release, dated February 1, 1999  (incorporated herein by 
reference to Exhibit 99.2 to the Company's Report on Form 8-K filed on 
February 10, 1999 (File No. 1-11700)).


                                  SIGNATURE

      Pursuant to the requirements of Section 12 of the Securities Exchange 
Act of 1934, the registrant has duly caused this registration statement to 
be signed on its behalf by the undersigned, thereto duly authorized.

                                       HEMAGEN DIAGNOSTICS, INC.


                                       By:  
                                           -------------------------
                                           Name:  Carl Franzblau, Ph.D.
                                           Title: President, Chief 
                                                  Executive Officer and 
                                                  Chairman of the Board

Date:  February 10, 1999





                                                                   Exhibit 1
                                                                   ---------

                              RIGHTS AGREEMENT

      This Rights Agreement (this "Agreement"), dated as of January 27, 
1999, is by and between Hemagen Diagnostics, Inc. (the "Company"), a 
Delaware corporation, and Continental Stock Transfer & Trust Company (the 
"Rights Agent"), a New York Corporation.

      The Company's Board of Directors has declared a dividend of one right 
(a "Right") in respect of each share of the Company's Common Stock 
outstanding of record as of the close of business, New York time, on 
February 10, 1999 (the "Record Date").  Each Right has the terms and is 
subject to the conditions set forth in this Agreement.

      The parties hereby agree as follows:

      1.    Certain Definitions.  For purposes of this Agreement:

      (a)    "Acquiring Person" means any Person who, together with all 
Affiliates and Associates of such Person, is the Beneficial Owner of 15% or 
more of the Common Shares of the Company then outstanding or who was such a 
Beneficial Owner at any time after the date hereof, whether or not such 
Person continues to be the Beneficial Owner of 15% or more of the Common 
Shares then outstanding, but will not include the Company, any Subsidiary of 
the Company, any employee benefit plan of the Company or any Subsidiary of 
the Company, or any entity holding securities of the Company organized, 
appointed, or established by the Company or any Subsidiary for or pursuant 
to the terms of any such plan.  Notwithstanding the foregoing, (i) none of 
Carl Franzblau, William Franzblau or Myrna Franzblau shall be deemed to be 
an "Acquiring Person", and (ii) no Person will become an "Acquiring Person" 
solely as the result of an acquisition of Common Shares by the Company 
which, by reducing the number of shares outstanding, increases the 
proportionate number of shares beneficially owned by such Person to 15% or 
more of the Common Shares of the Company then outstanding; provided, 
however, that if a Person becomes the Beneficial Owner of 15% or more of the 
Common Shares of the Company then outstanding by reason of share purchases 
by the Company, and after such share purchases by the Company, becomes the 
Beneficial Owner of any additional Common Shares of the Company, then such 
Person will be deemed to be an "Acquiring Person."  Notwithstanding the 
foregoing, if the Board of Directors of the Company determines in good faith 
that a Person who would otherwise be an "Acquiring Person," as defined 
pursuant to the foregoing provisions of this paragraph (a), has become such 
inadvertently, and such Person divests as promptly as practicable a 
sufficient number of Common Shares so that such Person would no longer be an 
"Acquiring Person," as defined pursuant to the foregoing provisions of this 
paragraph (a), then such Person shall not be deemed to be an "Acquiring 
Person" for any purposes of this Rights Agreement.

      (b)    "Affiliate" and "Associate" have the respective meanings 
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations 
under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), 
as in effect on the date of this Agreement.


      (c)    A Person will be deemed the "Beneficial Owner" of and will be 
deemed to "beneficially own" any securities:

            (i)    that such Person or any of such Person's Affiliates or 
      Associates, directly or indirectly, has the right to acquire (whether 
      such right is exercisable immediately or only after the passage of 
      time) pursuant to any agreement, arrangement, or understanding 
      (whether or not in writing) or upon the exercise of conversion rights, 
      exchange rights, rights, warrants or options, or otherwise; provided, 
      however, that a Person will not be deemed the "Beneficial Owner" of, 
      or to "beneficially own," (A) securities tendered pursuant to a tender 
      or exchange offer made by such Person or any of such Person's 
      Affiliates or Associates until such tendered securities are accepted 
      for payment, purchase, or exchange, or (B) at any time prior to the 
      occurrence of a Triggering Event, securities issuable upon exercise of 
      Rights, or (C) from and after the occurrence of a Triggering Event, 
      securities issuable upon exercise of Rights, which Rights were 
      acquired by such Person or any of such Person's Affiliates or 
      Associates prior to the Distribution Date or pursuant to Section 3(a) 
      or Section 23 hereof (the "Original Rights") or pursuant to Section 
      11(i) hereof in connection with an adjustment made with respect to any 
      Original Rights;

            (ii)    that such Person or any of such Person's Affiliates or 
      Associates, directly or indirectly, has the right to vote or dispose 
      of or has "beneficial ownership" of (as determined pursuant to Rule 
      13d-3 of the General Rules and Regulations under the Exchange Act), 
      including without limitation pursuant to any agreement, arrangement, 
      or understanding, whether or not in writing; provided, however, that a 
      Person will not be deemed the "Beneficial Owner" of, or to 
      "beneficially own," any security under this subparagraph (ii) as a 
      result of an oral or written agreement, arrangement, or understanding 
      to vote such security if such agreement, arrangement, or 
      understanding: (A) arises solely from a revocable proxy given in 
      response to a public proxy or consent solicitation made pursuant to, 
      and in accordance with, the applicable provisions of the General Rules 
      and Regulations under the Exchange Act, and (B) is not also then 
      reportable by such Person on Schedule 13D under the Exchange Act (or 
      any comparable or successor report); or

            (iii)    that are beneficially owned, directly or indirectly, by 
      any other Person (or any Affiliate or Associate thereof) with which 
      such Person (or any of such Person's Affiliates or Associates) has any 
      agreement, arrangement or understanding (whether or not in writing), 
      for the purpose of acquiring, holding, voting (except pursuant to a 
      revocable proxy as described in the proviso to subparagraph (ii) of 
      this paragraph (d)) or disposing of any voting securities of the 
      Company.

provided, however, that nothing in this paragraph (d) will cause a Person 
engaged in business as an underwriter of securities to be the "Beneficial 
Owner" of, or to "beneficially own," any securities acquired through such 
Person's participation in good faith in a firm commitment underwriting until 
the expiration of forty days after the date of such acquisition.

      (d)    "Business Day" means any day other than a Saturday, a Sunday, 
or a day on which banking institutions in New York City are authorized or 
obligated by law or executive order to close.

      (e)    "Close of business" on any given date means 5:00 P.M., New York 
City time, on such date; provided, however, that if such date is not a 
Business Day it means 5:00 P.M., New York City time, on the next succeeding 
Business Day.

      (f)    "Common Shares" when used with reference to the Company means 
the shares of common stock, par value $0.01 per share, of the Company.  
"Common Shares" when used with reference to any Person other than the 
Company means the capital stock with the greatest voting power, or the 
equity securities or other equity interest having power to control or direct 
the management, of such other Person, or if such other Person is a 
Subsidiary of another Person, of the Person or Persons that ultimately 
control such first-mentioned Person and which have issued and outstanding 
such capital stock, equity securities, or equity interests.

      (g)    "Distribution Date" has the meaning set forth in Section 3 
hereof.

      (h)    "Expiration Date" has the meaning set forth in Section 7 
hereof.

      (i)    "Final Expiration Date" has the meaning set forth in Section 7 
hereof.

      (j)    "Person" means any individual, firm, corporation, partnership, 
limited liability company, trust, or other entity, and includes any 
successor (by merger or otherwise) of such entity.

      (k)    "Redemption Date" has the meaning set forth in Section 7 
hereof.

      (l)    "Section 7(e) Person" has the meaning set forth in Section 7 
hereof.

      (m)    "Section 11(a)(ii) Event" means any event described in Section 
11(a)(ii) hereof.

      (n)    "Section 13 Event" means any event described in clauses (x), 
(y), or (z) of Section 13(a) hereof.

      (o)    "Shares Acquisition Date" means the first date of public 
announcement (which, for purposes of this definition, includes without 
limitation a report filed pursuant to Section 13(d) under the Exchange Act) 
by the Company or an Acquiring Person that an Acquiring Person has become 
such.

      (p)    "Subsidiary" of any Person means any other Person of which a 
majority of the voting power of the voting equity securities or equity 
interest is owned, directly or indirectly, by such first-mentioned Person, 
or which is otherwise controlled by such first-mentioned Person.

      (q)    "Triggering Event" means any Section 11(a)(ii) Event or any 
Section 13 Event.

      (r)    "Voting Stock" means (i) the Common Shares of the Company, and 
(ii) any other shares of capital stock of the Company entitled to vote 
generally in the election of directors or entitled to vote together with the 
Common Shares in respect of any merger, consolidation, sale of all or 
substantially all of the Company's assets, liquidation, dissolution, or 
winding-up.  Whenever any provision of this Agreement requires a 
determination of whether a number of shares of Voting Stock constituting a 
specified percentage of such Voting Stock has been voted, tendered, 
acquired, sold or otherwise disposed of, or a determination of whether a 
Person has offered or proposed to acquire a number of shares of Voting Stock 
constituting such specified percentage, the number of shares of Voting Stock 
constituting such specified percentage of Voting Stock will in every such 
case be deemed to be the number of shares of Voting Stock constituting the 
specified percentage of the Company's entire voting power then entitled to 
vote generally in the election of directors or then entitled to vote 
together with the Common Shares in respect of any merger, consolidation, 
sale of all or substantially all of the Company's assets, liquidation, 
dissolution, or winding-up.

      Section 2.    Appointment of Rights Agent.  The Company hereby 
appoints the Rights Agent to act as agent for the Company and the holders of 
the Rights (who until the Distribution Date, will also be the holders of the 
Common Shares in accordance with Section 3 hereof) in accordance with the 
terms and conditions hereof; and the Rights Agent hereby accepts such 
appointment.  The Company may from time to time appoint such co-Rights 
Agents as it may deem necessary or desirable, upon ten (10) days' prior 
written notice to the Rights Agent.  The Rights Agent shall have no duty to 
supervise, and shall in no event be liable for, the acts or omissions of any 
such co-Rights Agent.  In the event the Company appoints one or more Co-
Rights Agents, the respective duties of the Rights Agents and any Co-Rights 
Agents will be as the Company may determine.

      Section 3.    Issue of Rights Certificates.

      (a)    Until the earliest of:

            (i)    the close of business on the tenth Business Day after the 
      Shares Acquisition Date; or

            (ii)    the tenth Business Day (or such later date as may be 
      determined by action of the Board of Directors prior to such time as 
      any Person becomes an Acquiring Person) after the date of the 
      commencement by any Person (other than the Company, any Subsidiary of 
      the Company, any employee benefit plan of the Company or of any 
      Subsidiary of the Company or any entity holding Common Shares for or 
      pursuant to the terms of any such plan) of, or of the first public 
      announcement of the intention of any Person (other than the Company, 
      any Subsidiary of the Company, any employee benefit plan of the 
      Company or of any Subsidiary of the Company or any entity holding 
      Common Shares for or pursuant to the terms of any such plan) to 
      commence, a tender or exchange offer, the consummation of which would 
      result in any Person becoming the Beneficial Owner of Common Shares 
      aggregating 15% or more of the then outstanding Common Shares;

(including any such date which is after the date of this Agreement and prior 
to the issuance of the Rights; the earliest of such dates being herein 
referred to as the "Distribution Date"):

            (x)    no right may be exercised; 

            (y)    the Rights will be evidenced (subject to the provisions 
      of Section 3(b) hereof) by the certificates for Common Shares 
      registered in the names of the holders thereof (which certificates 
      will also be deemed to be certificates for Rights) and not by separate 
      certificates; and 

            (z)    the Rights (and the right to receive certificates 
      therefor) will be transferable only in connection with the transfer of 
      the underlying Common Shares.

As soon as practicable after the Distribution Date, the Company will prepare 
and execute, the Rights Agent will countersign, and the Company will send or 
cause to be sent (and if requested, the Rights Agent will send) by first-
class, postage-prepaid mail or other appropriate means, to each record 
holder of Common Shares as of the close of business on the Distribution 
Date, at the address of such holder shown on the records of the Company, a 
certificate for Rights, in substantially the form of the attached Exhibit A 
(collectively, "Rights Certificates"), evidencing one Right for each Common 
Share so held.  As of and after the Distribution Date, the Rights will be 
evidenced solely by Rights Certificates.

      (b)    On the Record Date, or as soon as practicable thereafter, the 
Company will send a copy of a Summary of Rights to Purchase Common Shares, 
in substantially the form of the attached Exhibit B (the "Summary of 
Rights"), by first-class, postage-prepaid mail, or other appropriate means, 
to each record holder of Common Shares as of the close of business on the 
Record Date, at the address of such holder shown on the records of the 
Company or its transfer agent.

      With respect to certificates for Common Shares outstanding as of the 
Record Date, until the Distribution Date (or earlier redemption, expiration 
or termination of the Rights), the Rights will be evidenced by such 
certificates registered in the names of the holders thereof together with a 
copy of the Summary of Rights attached thereto, and the registered holders 
of the Common Shares will also be the registered holders of the associated 
Rights.  With respect to uncertificated Common Shares outstanding as of the 
Record Date, until the Distribution Date, the Rights will be evidenced by 
the registration of the Common Shares in the Company's share register in the 
names of the holders thereof.

      Until the Distribution Date (or earlier redemption, expiration or 
termination of the Rights), the surrender for transfer of any certificate 
for Common Shares outstanding on the Record Date, even without a copy of the 
Summary of Rights attached thereto, will also constitute the transfer of the 
Rights associated with the Common Shares represented by such certificate.

      (c)    Certificates issued for Common Shares (including without 
limitation certificates issued upon transfer or exchange of Common Shares) 
after the Record Date but prior to the earlier of the Distribution Date or 
the Expiration Date will be deemed also to be certificates for Rights and 
will have impressed, printed, or written thereon, or otherwise affixed 
thereto, the following legend:

      "This certificate also evidences and entitles the holder hereof to 
      certain rights as set forth in a Rights Agreement between Hemagen 
      Diagnostics, Inc. and Continental Stock Transfer and Trust Company, 
      dated as of January 27, 1999 (the "Rights Agreement"), the terms of 
      which are hereby incorporated herein by reference and a copy of which 
      is on file at the principal executive offices of Hemagen Diagnostics, 
      Inc..  Under certain circumstances, as set forth in the Rights 
      Agreement, such Rights may be redeemed, may expire, or may be 
      evidenced by separate certificates and no longer be evidenced by this 
      certificate.  Hemagen Diagnostics, Inc. will mail to the registered 
      holder of this certificate a copy of the Rights Agreement without 
      charge after receipt of a written request therefor.  As described in 
      the Rights Agreement, under certain circumstances, Rights held by 
      Acquiring Persons (as defined in the Rights Agreement), or certain 
      related Persons, and any subsequent holder of such Rights, may become 
      null and void."

and, in the case of the initial transaction or subsequent periodic 
statements with respect to uncertificated Common Shares, the following 
legend:

      "The registration in the share register of Hemagen Diagnostics, Inc. 
      of the shares of common stock to which this initial transaction or 
      subsequent periodic statement relates also evidences and entitles the 
      registered holder of such shares to certain rights as set forth in a 
      Rights Agreement between Hemagen Diagnostics, Inc. and Continental 
      Stock Transfer and Trust Company, dated as of January 27, 1999 (the 
      "Rights Agreement"), the terms of which are hereby incorporated herein 
      by reference and a copy of which is on file at the principal executive 
      offices of Hemagen Diagnostics, Inc.  Under certain circumstances, as 
      set forth in the Rights Agreement, such Rights will be evidenced by 
      separate certificates and will no longer be evidenced by such 
      registration.  Hemagen Diagnostics, Inc. will mail to the holder of 
      this certificate a copy of the Rights Agreement without charge after 
      receipt of a written request therefor.  Under certain circumstances, 
      as set forth in the Rights Agreement, Rights issued to any Person who 
      becomes an Acquiring Person (as defined in the Rights Agreement) may 
      become null and void."

      Until the Distribution Date, the Rights associated with Common Shares 
will be evidenced only by the certificates representing such Common Shares, 
and the surrender for transfer of any such certificate will also constitute 
the transfer of the Rights associated with the Common Shares represented 
thereby.  However, with respect to such initial transaction or subsequent 
periodic statements containing the foregoing legend, until the Distribution 
Date, the Rights associated with the Common Shares with respect to which 
such statements are issued shall be evidenced solely by the registration of 
ownership of such Common Shares in the share register of the Company, and 
the registration of transfer of ownership in such share register shall also 
constitute the transfer of the Rights associated with the Common Shares 
whose ownership is so transferred.  In the event that the Company purchases 
or acquires any Common Shares after the Record Date but prior to the 
Distribution Date, any Rights associated with such Common Shares will be 
deemed cancelled and retired so that the Company will not be entitled to 
exercise any Rights associated with the Common Shares that are no longer 
outstanding.

      Notwithstanding anything to the contrary stated herein, no Rights 
Certificate shall be issued pursuant to this Section 3 that represents 
Rights "beneficially owned" by an Acquiring Person whose Rights would be 
void pursuant to Section 7(e) or any Associate or Affiliate of any such 
Acquiring Person; no Rights Certificate shall be issued at any time upon the 
transfer of any Rights to an Acquiring Person whose Rights would be void 
pursuant to Section 7(e) or any Associate or Affiliate thereof or to any 
nominee of such Acquiring Person, Associate or Affiliate; any Rights 
Certificate delivered to the Rights Agent for transfer to an Acquiring 
Person whose Rights would be void pursuant to Section 7(e) shall be 
canceled.

      Section 4.    Form of Rights Certificates.

      The Rights Certificates (and the forms of election to purchase shares 
and of assignment to be printed on the reverse thereof) will be 
substantially in the form of the attached Exhibit A, and may have such marks 
of identification or designation and such legends, summaries, or 
indorsements printed thereon as the Company may deem appropriate and as are 
not inconsistent with the provisions of this Agreement, or as may be 
required to comply with any applicable law or with any rule or regulation 
made pursuant thereto or with any rule or regulation of any stock exchange 
or securities quotation system on or by which the Rights may from time to 
time be listed or quoted, or to conform to usage.  Subject to the provisions 
of Section 11 and Section 23 hereof, the Rights Certificates initially will 
entitle the holders thereof to purchase such number of Common Shares as may 
be set forth therein at the price per Common Share set forth therein (the 
"Purchase Price"), but the number of such Common Shares and the Purchase 
Price will be subject to adjustment as provided herein.

      Section 5.    Countersignature and Registration.  The Rights 
Certificates will be executed on behalf of the Company by such officer or 
officers who would be entitled to sign certificates representing Common 
Shares, either manually or by facsimile signature, may (but need not) have 
affixed thereto the Company's seal or a facsimile thereof, and may (but need 
not) be attested by the Secretary or an Assistant Secretary of the Company, 
either manually or by facsimile signature.  The Rights Certificates will be 
countersigned by the Rights Agent and will not be valid for any purpose 
unless so countersigned.  If any officer of the Company who signed any of 
Rights Certificate ceases to be such officer of the Company before 
countersignature by the Rights Agent and issuance and delivery by the 
Company, such Rights Certificate, nevertheless, may be countersigned by the 
Rights Agent and issued and delivered by the Company with the same force and 
effect as though the Person who signed such Rights Certificate had not 
ceased to be such officer of the Company; and any Rights Certificate may be 
signed on behalf of the Company by any Person who, at the actual date of the 
execution of such Rights Certificate, will be a proper officer of the 
Company to sign such Rights Certificate, although at the date of the 
execution of this Rights Agreement any such Person was not such an officer.

      Following the Distribution Date, the Rights Agent will keep or cause 
to be kept books for registration and transfer of the Rights Certificates, 
showing the names and addresses of the respective holders of the Rights 
Certificates, the number of Rights evidenced on its face by each of the 
Rights Certificates, and the date of each Rights Certificate.

      Section 6.    Transfer, Split-Up, Combination and Exchange of Rights 
Certificates; Mutilated, Destroyed, Lost or Stolen Rights Certificates.  
Subject to the provisions of Sections 3(c), 4, 7(e), and 15 hereof, at any 
time after the close of business on the Distribution Date, and before the 
close of business on the Expiration Date, any Rights Certificate(s) may be 
transferred, split up, combined, or exchanged for one or more new Rights 
Certificates entitling the registered holder to purchase the same number of 
Common Shares as the Rights Certificate(s) surrendered then entitled such 
holder to purchase.

      Any registered holder desiring to transfer, split up, combine, or 
exchange any Rights Certificate(s) will make such request in writing 
delivered to the Rights Agent, and will surrender the Rights Certificate or 
Rights Certificates to be transferred, split up, combined, or exchanged at 
the office of the Rights Agent designated for such purpose.  Neither the 
Rights Agent nor the Company shall be obligated to take any action 
whatsoever with respect to the transfer, split up, combination or exchange 
of any such surrendered Rights Certificate until the registered holder shall 
have completed and signed the certificate contained in the form of 
assignment on the reverse side of such Rights Certificate and shall have 
provided such additional evidence of the identity of the Beneficial Owner 
(or former Beneficial Owner) or Affiliates or Associates thereof as the 
Company shall reasonably request.  Thereupon the Rights Agent will 
countersign and deliver to the Person entitled thereto one or more Rights 
Certificates, as the case may be, as so requested.  The Company may require 
payment of a sum sufficient to cover any tax or other governmental charge 
that may be imposed in connection with any transfer, split-up, combination, 
or exchange of Rights Certificates.

      Upon receipt by the Company and the Rights Agent of evidence 
reasonably satisfactory to them of the loss, theft, destruction, or 
mutilation of a Rights Certificate, and in case of loss, theft, or 
destruction, of indemnity and/or security reasonably satisfactory to them, 
and at the Company's request, reimbursement to the Company and the Rights 
Agent of all reasonable expenses incidental thereto, and upon surrender to 
the Rights Agent and cancellation of the Rights Certificate if mutilated, 
the Company will execute and deliver a new Rights Certificate of like tenor 
to the Rights Agent for delivery to the registered holder in lieu of the 
Rights Certificate so lost, stolen, destroyed, or mutilated.

      Section 7.    Exercise of Rights; Purchase Price; Expiration Date of 
Rights.

      (a)    Subject to Section 7(e) hereof, the registered holder of any 
Rights Certificate may exercise the Rights evidenced thereby (except as 
otherwise provided herein) in whole or in part at any time after the 
Distribution Date upon surrender of the Rights Certificate, with the form of 
election to purchase on the reverse side thereof duly executed, to the 
Rights Agent at the office of the Rights Agent designated for such purpose, 
together with payment of the Purchase Price for the Common Shares (or other 
securities) as to which the Rights are being exercised, at or prior to the 
earliest of:

            (i)    the close of business on the tenth anniversary of the 
      date hereof (the "Final Expiration Date"); 

            (ii)    the time at which the Rights are redeemed as provided in 
      Section 24 hereof (the "Redemption Date"); or 

            (iii)    the time at which such Rights are exchanged as provided 
      in Section 25 hereof (such earliest time being herein referred to as 
      the "Expiration Date").

      (b)    The Purchase Price for each Common Share upon the exercise of a 
Right will initially be $4.00, will be subject to adjustment from time to 
time as provided in Sections 11 and 13 hereof, and will be payable in lawful 
money of the United States of America in accordance with Section 7(c) 
hereof.

      (c)    Upon receipt of a Rights Certificate representing exercisable 
Rights, with the appropriate form of election to purchase duly executed, 
accompanied by payment of the Purchase Price for the shares to be purchased 
and an amount equal to any applicable transfer tax required to be paid by 
the holder of such Rights Certificate in accordance with Section 9 hereof, 
in cash or by certified check, cashier's check, money order, or bank draft 
paid or payable to the order of the Company, the Rights Agent will thereupon 
promptly:

            (i)    (A) requisition from any transfer agent of the Common 
      Shares (or make available, if the Rights Agent is the transfer agent) 
      certificates for the number of Common Shares to be purchased (and the 
      Company hereby irrevocably authorizes its transfer agent to comply 
      with all such requests), or (B) if the Company, in its sole 
      discretion, elects to deposit the Common Shares issuable upon 
      conversion of the Rights hereunder into a depository, requisition from 
      the depository agent depository receipts representing such number of 
      Common Shares as are to be purchased (in which case certificates for 
      the Common Shares represented by such receipts will be deposited by 
      the transfer agent with the depository agent) and the Company will 
      direct the depository agent to comply with such request;

            (ii)    when appropriate, requisition from the Company the 
      amount of cash, if any, to be paid in lieu of issuance of fractional 
      shares in accordance with Section 15 hereof;

            (iii)    promptly after receipt of such certificates or 
      depository receipts, cause the same to be delivered to or upon the 
      order of the registered holder of such Rights Certificate, registered 
      in such name or names as may be designated by such holder; and

            (iv)    when appropriate, after receipt, promptly deliver such 
      cash to or upon the order of the registered holder of such Rights 
      Certificate.  In the event that the Company is obligated to issue 
      other securities of the Company pursuant to Section 11(a), the Company 
      will make all arrangements necessary so that such other securities are 
      available for distribution by the Rights Agent, if, as, and when 
      appropriate.

      (d)    Subject to the provisions of Section 15 hereof, if the 
registered holder of any Rights Certificate exercises less than all of the 
Rights evidenced thereby, a new Rights Certificate evidencing Rights 
equivalent to the Rights remaining unexercised will be issued by the Rights 
Agent to the registered holder of such Rights Certificate.

      (e)    Notwithstanding anything in this Agreement to the contrary, 
from and after the first occurrence of a Section 11(a)(ii) Event, any Rights 
beneficially owned by any:

            (i)    Acquiring Person or Associate or Affiliate of an 
      Acquiring Person;

            (ii)    transferee of an Acquiring Person (or of any Associate 
      or Affiliate of an Acquiring Person) who becomes such a transferee 
      after the Acquiring Person becomes such; or 

            (iii)    transferee of an Acquiring Person (or of any Associate 
      or Affiliate of an Acquiring Person) who becomes a transferee prior to 
      or concurrently with the Acquiring Person becoming such and who 
      receives such Rights pursuant to either (A) a transfer (regardless of 
      whether for consideration) from such Acquiring Person, Associate, or 
      Affiliate to holders of equity interests in such Acquiring Person, 
      Associate, or Affiliate, or to any Person with whom such Acquiring 
      Person, Associate, or Affiliate has any continuing oral or written 
      plan, agreement, arrangement, or understanding regarding the 
      transferred Rights, or (B) a transfer that the Board of Directors of 
      the Company has determined is part of an oral or written plan, 
      agreement, arrangement, or understanding that has as a primary purpose 
      or effect avoidance of this Section 7(e);

(each Person described in the preceding clauses (i) through (iii) of this 
Section 7(e), a "Section 7(e) Person") will become null and void without any 
further action, and no holder of such Rights will have any rights whatsoever 
with respect to such Rights, whether under this Agreement or otherwise.  

      The Company will use reasonable efforts to insure that the provisions 
of this Section 7(e) and Sections 3(c) and 4 hereof are complied with, but 
will have no liability to any holder of Rights Certificates or any other 
Person as a result of its failure to make or erroneous making of any 
determination with respect to an Acquiring Person, Affiliate or Associate of 
an Acquiring Person, or transferee of any such Person.

      (f)    Notwithstanding anything in this Agreement to the contrary, 
neither the Rights Agent nor the Company will be obligated to undertake any 
action with respect to a registered holder upon the occurrence of any 
purported exercise as set forth in this Section 7 unless the certificate 
contained in the form of election to purchase set forth on the reverse side 
of the Rights Certificate surrendered for such exercise will have been 
properly completed and duly executed by the registered holder thereof and 
the Company will have been provided with such additional evidence of the 
identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates 
or Associates thereof as the Company will reasonably request.

      Section 8.    Cancellation and Destruction of Rights Certificates.  
All Rights Certificates surrendered for the purpose of exercise, transfer, 
split up, combination, or exchange will, if surrendered to the Company or to 
any of its agents, be delivered to the Rights Agent for cancellation or in 
cancelled form, or if surrendered to the Rights Agent, will be cancelled by 
it; and no Rights Certificates will be issued in lieu thereof except as 
expressly permitted by any of the provisions of this Rights Agreement.  The 
Company will deliver to the Rights Agent for cancellation and retirement, 
and the Rights Agent will so cancel and retire, any other Rights Certificate 
purchased or acquired by the Company otherwise than upon the exercise 
thereof.  The Rights Agent will deliver all cancelled Rights Certificates to 
the Company, or at the written request of the Company, will destroy such 
cancelled Rights Certificates and certify such destruction to the Company.

      Section 9.    Reservation and Availability of Common Shares.

      (a)    The Company covenants and agrees that it will cause to be 
reserved and kept available out of its authorized and unissued Common Shares 
or any Common Shares held in its treasury, a number of Common Shares (or 
other securities) sufficient to permit the exercise in full of all 
outstanding Rights in accordance with Section 7 of this Agreement.

      (b)    The Company covenants and agrees that it will take all such 
action as may be necessary to ensure that all Common Shares or other 
securities delivered upon due exercise of Rights and payment of the purchase 
price therefor will be duly and validly authorized and issued, fully paid, 
and nonassessable at the time of delivery of the certificates for such 
Common Shares or other securities.

      (c)    The Company further covenants and agrees that it will pay when 
due and payable any and all federal and state transfer taxes and charges 
payable in respect of the issuance or delivery of the Rights Certificates or 
of any Common Shares or other securities upon the exercise of Rights.  The 
Company will not, however, be required to pay any transfer tax payable in 
respect of any transfer or delivery of Rights Certificates to a Person other 
than, or the issuance or delivery of certificates or depository receipts for 
the Common Shares or other securities in a name other than that of, the 
registered holder of the Rights Certificate evidencing Rights surrendered 
for exercise; or to issue or to deliver any certificates or depository 
receipts for Common Shares or other securities upon the exercise of any 
Rights until any such tax has been paid (any such tax being payable by the 
holder of such Rights Certificate at the time of surrender) or until it has 
been established to the Company's reasonable satisfaction that no such tax 
is due.

      (d)    The Company may temporarily suspend the exercisability of the 
Rights in order to prepare and file any registration statement as may be 
required to be filed pursuant to applicable law with respect to securities 
purchasable upon exercise of the Rights.  Upon any such suspension, the 
Company will issue a public announcement stating that the exercisability of 
the Rights has been temporarily suspended.  The Company will thereafter 
issue a public announcement at such time as the suspension is no longer in 
effect.

      Section 10.  Common Shares Record Date.  Each Person in whose name any 
certificate for Common Shares (or other securities) is issued upon the 
exercise of Rights will for all purposes be deemed to have become the holder 
of record of the Common Shares represented thereby on, and such certificate 
will be dated, the date upon which the Rights Certificate evidencing such 
Rights was duly surrendered and payment of the Purchase Price (and any 
applicable transfer taxes) was made; provided, however, that if the date of 
such surrender and payment is a date upon which the Common Shares (or other 
securities) transfer books of the Company are closed, such Person will be 
deemed to have become the record holder of such shares on, and such 
certificate will be dated, the next succeeding Business Day on which the 
Common Shares (or other securities) transfer books of the Company are open.  

      Until a Rights Certificate has been duly exercised, the holder thereof 
will not be entitled to any rights of a stockholder of the Company with 
respect to shares for which the Rights may be exercisable ( including 
without limitation the rights to vote and to receive dividends and other 
distributions) and will not be entitled to receive any notice of any 
proceedings of the Company, except as specifically provided herein.

      Section 11.    Adjustment of Purchase Price, Number and Kind of Shares 
or Number of Rights.  The Purchase Price, the number and kind of shares 
covered by each Right, and the number of Rights outstanding are subject to 
adjustment from time to time as provided in this Section 11.

            (a)  (i)    Except as otherwise provided in this Section 11(a) 
      and in Section 7(e), if the Company at any time after the date of this 
      Agreement (A) declares a dividend on the Common Shares payable in 
      Common Shares, (B) subdivides the outstanding Common Shares, 
      (C) combines the outstanding Common Shares into a smaller number of  
      shares, or (D) issues any shares of its capital stock in a 
      reclassification of the Common Shares (including any such 
      reclassification in connection with a consolidation or merger in which 
      the Company is the continuing or surviving corporation), then the 
      Purchase Price in effect at the time of the record date for such 
      dividend or of the effective date of such subdivision, combination, or 
      reclassification, as the case may be, and the number and kind of 
      shares of capital stock issuable on such date, each will be 
      proportionately adjusted so that the holder of any Right duly 
      exercised after such applicable time will be entitled to receive, upon 
      payment of the Purchase Price then in effect, the aggregate number and 
      kind of shares of capital stock that, if such Right had been exercised 
      immediately prior to such applicable time and at a time when the 
      Common Shares transfer books of the Company were open, such holder 
      would have owned upon such exercise and been entitled to receive by 
      virtue of such dividend, subdivision, combination, or 
      reclassification; provided, however, that in no event will the 
      consideration to be paid upon the exercise of one Right be less than 
      the aggregate par value of the shares of capital stock of the Company 
      issuable upon exercise of one Right.  If an event occurs that would 
      require an adjustment under both this Section 11(a)(i) and Section 
      11(a)(ii), the adjustment provided for in this Section 11(a)(i) will 
      be in addition to, and will be made prior to, any adjustment required 
      pursuant to Section 11(a)(ii).

            (ii)    Subject to Section 25 of this Agreement, if any Person 
      becomes an Acquiring Person then, and in each such case, proper 
      provision will be made promptly so that, following the Distribution 
      Date, each holder of a Right, except as provided in Section 7(e) 
      hereof, will have a right to receive, upon exercise thereof at a price 
      equal to the then current Purchase Price in accordance with the terms 
      of this Agreement, such number of Common Shares of the Company as is 
      equal to the result obtained by (x) multiplying the then current 
      Purchase Price by the then number of Common Shares for which a Right 
      was exercisable immediately prior to the first occurrence of a Section 
      11(a)(ii) Event, and (y) dividing that product (which following such 
      first occurrence will thereafter be referred to as the "Purchase 
      Price" for each Right and for all purposes of this Agreement) by 50% 
      of the then current per share market price of the Company's Common 
      Shares (determined pursuant to Section 11(d) hereof) on the date of 
      such first occurrence (such number of shares, the "Adjustment 
      Shares"); provided, however, that if the transaction that would 
      otherwise give rise to the foregoing adjustment is also subject to the 
      provisions of Section 13 hereof, then only the provisions of Section 
      13 hereof will apply and no adjustment will be made pursuant to this 
      Section 11(a)(ii).  In the event that any Person shall become an 
      Acquiring Person and the Rights shall then be outstanding, the Company 
      shall not take any action which would eliminate or diminish the 
      benefits intended to be afforded by the Rights.

            (iii)    In the event that the number of Common Shares that are 
      authorized by the Company's certificate of incorporation (as amended 
      and in effect as of the relevant time) but not outstanding or reserved 
      for issuance for purposes other than upon exercise of the Rights, are 
      not sufficient to permit the exercise in full of the Rights in 
      accordance with the foregoing subparagraph (ii) of this Section 11(a), 
      the Company will:  (A) determine the excess of the value of the 
      Adjustment Shares issuable upon the exercise of a Right (the "Current 
      Value") over the Purchase Price (such excess, the "Spread"), and (B) 
      with respect to each Right, make adequate provision to substitute for 
      the Adjustment Shares, upon payment of the applicable Purchase Price, 
      (1) cash, (2) a reduction in the Purchase Price, (3) Common Shares of 
      the same or a different class or other equity securities of the 
      Company (including without limitation preferred shares or units of 
      preferred shares that the Company's Board of Directors in good faith 
      deems (based on, among other things, the dividend and liquidation 
      rights of such preferred shares) to have substantially the same 
      economic value as Common Shares (such preferred shares, hereinafter 
      referred to as "common share equivalents")), (4) debt securities of 
      the Company, (5) other assets, or (6) any combination of the 
      foregoing, having an aggregate value equal to the Current Value, where 
      such aggregate value has been determined by the Board of Directors 
      after considering the advice of a competent investment banking firm 
      selected by the Board of Directors of the Company; provided, however, 
      that if the Company has not made adequate provision to deliver value 
      pursuant to clause (B) above within thirty (30) days following the 
      later of (x) the first occurrence of a Section 11(a)(ii) Event and (y) 
      the date on which the Company's right of redemption pursuant to 
      Section 24(b) expires (the later of (x) and (y) being referred to 
      herein as the "Section 11(a)(ii) Trigger Date"), then the Company will 
      be obligated to deliver, upon the surrender for exercise of a Right 
      and without requiring payment of the Purchase Price, Common Shares (to 
      the extent available) and then, if necessary, cash, which shares 
      and/or cash have an aggregate value equal to the Spread.  If the Board 
      of Directors of the Company determines in good faith that it is likely 
      that sufficient additional Common Shares could be authorized for 
      issuance upon exercise in full of the Rights, the 30-day period set 
      forth above may be extended to the extent necessary, but not more than 
      90 days after the Section 11(a)(ii) Trigger Date, in order that the 
      Company may seek stockholder approval for the authorization of such 
      additional shares (such period, as it may be extended, the 
      "Substitution Period").  To the extent that the Company determines 
      that action need be taken pursuant to the first and/or second 
      sentences of this Section 11(a)(iii), the Company will provide, 
      subject to Section 7(e) hereof, that such action will apply uniformly 
      to all outstanding Rights, and may suspend the exercisability of the 
      Rights until the expiration of the Substitution Period in order to 
      seek any authorization of additional shares and/or to decide the 
      appropriate form of distribution to be made pursuant to such first 
      sentence and to determine the value thereof.  The Company will make a 
      public announcement when the exercisability of the Rights has been 
      temporarily suspended, and again when such suspension is no longer in 
      effect.  For purposes of this Section 11(a)(iii), the value of the 
      Common Shares will be the current market price (as determined pursuant 
      to Section 11(d) hereof) per Common Share on the Section 11(a)(ii) 
      Trigger Date and the value of any "common share equivalent" will be 
      deemed to have the same value as the Common Shares on such date.

      (b)    If the Company fixes a record date for the issuance of rights, 
options, or warrants to all holders of Common Shares entitling them (for a 
period expiring within 45 calendar days after such record date) to subscribe 
for or purchase Common Shares (or shares having the same or more favorable 
rights, privileges, and preferences as the Common Shares ("equivalent common 
shares")) or securities convertible into Common Shares or equivalent common 
shares at a price per Common Share or equivalent common share (or having a 
conversion price per share, if a security convertible into Common Shares or 
equivalent common shares) less than the then current per share market price 
of the Common Shares (as defined in Section 11(d)) on such record date, the 
Purchase Price to be in effect after such record date will be determined by 
multiplying the Purchase Price in effect immediately prior to such record 
date by a fraction, the numerator of which will be the number of Common 
Shares outstanding on such record date plus the number of Common Shares that 
the aggregate offering price of the total number of Common Shares and/or 
equivalent common shares so to be offered (and/or the aggregate initial 
conversion price of the convertible securities so to be offered) would 
purchase at such current market price and the denominator of which will be 
the number of Common Shares outstanding on such record date plus the number 
of additional Common Shares and/or equivalent common shares to be offered 
for subscription or purchase (or into which the convertible securities so to 
be offered are initially convertible); provided, however, that in no event 
will the consideration to be paid upon the exercise of one Right be less 
than the aggregate par value of the shares of capital stock of the Company 
issuable upon exercise of one Right.  In case such subscription price may be 
paid in a consideration part or all of which will be in a form other than 
cash, the value of such consideration will be as determined in good faith by 
the Board of Directors of the Company, whose determination will be described 
in a statement filed with the Rights Agent.  Common Shares owned by or held 
for the account of the Company will not be deemed outstanding for the 
purpose of any such computation.  Such adjustment will be made successively 
whenever such a record date is fixed; and in the event that such rights, 
options or warrants are not so issued, the Purchase Price will be adjusted 
to be the Purchase Price which would then be in effect if such record date 
had not been fixed.

      (c)    If the Company fixes a record date for the making of a 
distribution to all holders of the Common Shares (including any such 
distribution made in connection with a consolidation or merger in which the 
Company is the continuing or surviving corporation) of cash, evidences of 
indebtedness, or other assets (other than a dividend payable in Common 
Shares) or subscription rights or warrants (excluding those referred to in 
Section 11(b) hereof), the Purchase Price to be in effect after such record 
date will be determined by multiplying the Purchase Price in effect 
immediately prior to such record date by a fraction, the numerator of which 
will be the then current per share market price of the Common Shares on such 
record date, less the fair market value (as determined in good faith by the 
Board of Directors of the Company, whose determination will be described in 
a statement filed with the Rights Agent) of the portion of the cash, 
evidences of indebtedness, or other assets so to be distributed or of such 
subscription rights or warrants applicable to one Common Share and the 
denominator of which will be such current per share market price of the 
Common Shares; provided, however, that in no event will the consideration to 
be paid upon the exercise of one Right be less than the aggregate par value 
of the shares of capital stock of the Company to be issued upon exercise of 
one Right.  Such adjustments will be made successively whenever such a 
record date is fixed; and in the event that such distribution is not so 
made, the Purchase Price will again be adjusted to be the Purchase Price 
that would then be in effect if such record date had not been fixed.

            (d)  (i)    For the purpose of any computation hereunder other 
      than computations made pursuant to Section 11(a)(iii) hereof, the 
      "current per share market price" of any Security (a "Security" for the 
      purpose of this Section 11(d)(i)) on any date will be deemed to be the 
      average of the daily closing prices per share of such Security for the 
      30 consecutive Trading Days (as hereinafter defined) immediately prior 
      to such date; provided, however, that in the event that the current 
      per share market price of the Security is determined during a period 
      following the announcement by the issuer of such Security of (A) a 
      dividend or distribution on such Security payable in shares of such 
      Security or securities convertible into such shares, or (B) any 
      subdivision, combination, or reclassification of such Security and 
      prior to the expiration of 30 Trading Days after the ex-dividend date 
      for such dividend or distribution, or the record date for such 
      subdivision, combination, or reclassification, then, and in each such 
      case, the current per share market price will be appropriately 
      adjusted to reflect the current market price per share equivalent of 
      such Security.  The closing price for each day will be the last sale 
      price, regular way, or in case no such sale takes place on such day, 
      the average of the closing bid and asked prices, regular way, in 
      either case as reported in the principal consolidated transaction 
      reporting system with respect to securities listed or admitted to 
      trading on the New York Stock Exchange, or if the Security is not 
      listed or admitted to trading on the New York Stock Exchange, as 
      reported in the principal consolidated transaction reporting system 
      with respect to securities listed on the principal national securities 
      exchange on which the Security is listed or admitted to trading, or if 
      the Security is not listed or admitted to trading on any national 
      securities exchange, the last quoted price, or if not so quoted, the 
      average of the high bid and low asked prices in the over-the-counter 
      market, as reported by National Association of Securities Dealers, 
      Inc. Automated Quotations System ("NASDAQ") or such other system then 
      in use, or if on any such date the Security is not quoted by any such 
      organization, the average of the closing bid and asked prices as 
      furnished by a professional market maker making a market in the 
      Security selected by the Board of Directors of the Company.  The term 
      "Trading Day" means a day on which the principal national securities 
      exchange on which the Security is listed or admitted to trading is 
      open for the transaction of business or, if the Security is not listed 
      or admitted to trading on any national securities exchange, a Business 
      Day.

            (ii)    For the purpose of any computation hereunder, the 
      "current per share market price" of the Common Shares will be 
      determined in accordance with the method set forth in Section 
      11(d)(i).  If the Common Shares are not publicly held or so listed or 
      traded, "current per share market price" means the fair value per 
      share as determined in good faith by the Board of Directors of the 
      Company, whose determination will be described in a statement filed 
      with the Rights Agent.

      (e)    Subject to the final sentence of this Section 11(e), no 
adjustment in the Purchase Price will be required unless such adjustment 
would require an increase or decrease of at least 1% in the Purchase Price; 
provided, however, that any adjustments that by reason of this Section 11(e) 
are not required to be made will be carried forward and taken into account 
in any subsequent adjustment.  All calculations under this Section 11 will 
be made to the nearest cent or to the nearest one ten-thousandth of any 
Common Share or any other share or security, as the case may be.  
Notwithstanding the first sentence of this Section 11(e), any adjustment 
required by this Section 11 will be made no later than the earlier of 
(i) three years from the date of the transaction that requires such 
adjustment or (ii) the Expiration Date.

      (f)    If as a result of an adjustment made pursuant to Section 11(a) 
hereof, the holder of any Right thereafter exercised will become entitled to 
receive any shares of capital stock of the Company other than Common Shares, 
thereafter the number of such other shares so receivable upon exercise of 
any Right will be subject to adjustment from time to time in a manner and on 
terms as nearly equivalent as practicable to the provisions with respect to 
the Common Shares contained in Section 11(a) through (c), (e), (h) through 
(k), and (m), and the provisions of Sections 7, 9, 10, 13, 14, and 15 with 
respect to the Common Shares will apply on like terms to any such other 
shares.

      (g)    All Rights originally issued by the Company subsequent to any 
adjustment made to the Purchase Price hereunder will evidence the right to 
purchase, at the adjusted Purchase Price, the number of Common Shares 
purchasable from time to time hereunder upon exercise of the Rights, all 
subject to further adjustment as provided herein.

      (h)    Unless the Company has exercised its election as provided in 
Section 11(i), upon each adjustment of the Purchase Price as a result of the 
calculations made in Sections 11(b) and (c), each Right outstanding 
immediately prior to the making of such adjustment will thereafter evidence 
the right to purchase, at the adjusted Purchase Price, that number of Common 
Shares (calculated to the nearest one ten thousandth of a Common Share) 
obtained by (i) multiplying (x) the number of Common Shares covered by a 
Right immediately prior to this adjustment by (y) the Purchase Price in 
effect immediately prior to such adjustment of the Purchase Price, and 
(ii) dividing the product so obtained by the Purchase Price in effect 
immediately after such adjustment of the Purchase Price.

      (i)    The Company may elect on or after the date of any adjustment of 
the Purchase Price to adjust the number of Rights, in substitution for any 
adjustment in the number of Common Shares purchasable upon the exercise of a 
Right.  Each of the Rights outstanding after such adjustment of the number 
of Rights will be exercisable for the number of Common Shares for which a 
Right was exercisable immediately prior to such adjustment.  Each Right held 
of record prior to such adjustment of the number of Rights will become that 
number of Rights (calculated to the nearest one ten-thousandth) obtained by 
dividing the Purchase Price in effect immediately prior to adjustment of the 
Purchase Price by the Purchase Price in effect immediately after adjustment 
of the Purchase Price.  The Company will make a public announcement of its 
election to adjust the number of Rights, indicating the record date for the 
adjustment, and if known at the time, the amount of the adjustment to be 
made.  This record date may be the date on which the Purchase Price is 
adjusted or any day thereafter, but if the Rights Certificates have been 
issued, will be at least 10 days later than the date of the public 
announcement.  If Rights Certificates have been issued, upon each adjustment 
of the number of Rights pursuant to this Section 11(i), the Company as 
promptly as practicable will cause to be distributed to holders of record of 
Rights Certificates on such record date Rights Certificates evidencing, 
subject to Section 15 hereof, the additional Rights to which such holders 
will be entitled as a result of such adjustment, or at the Company's option, 
will cause to be distributed to such holders of record in substitution and 
replacement for the Rights Certificates held by such holders prior to the 
date of adjustment, and upon surrender thereof, if required by the Company, 
new Rights Certificates evidencing all the Rights to which such holders are 
entitled after such adjustment.  Rights Certificates so to be distributed 
will be issued, executed, and countersigned in the manner provided for 
herein (and may bear, at the option of the Company, the adjusted Purchase 
Price) and will be registered in the names of the holders of record of 
Rights Certificates on the record date specified in the public announcement.

      (j)    Irrespective of any adjustment or change in the Purchase Price 
or the number of Common Share issuable upon the exercise of the Rights, the 
Rights Certificates theretofore and thereafter issued may continue to 
express the Purchase Price and the number of Common Shares that were 
expressed in the initial Rights Certificates issued hereunder.

      (k)    Before taking any action that would cause an adjustment 
reducing the Purchase Price below the then par value, if any, of the Common 
Shares issuable upon exercise of the Rights, the Company will take any 
corporate action that may be necessary, in the opinion of its counsel, in 
order that the Company may validly and legally issue fully paid and 
nonassessable Common Shares at such adjusted Purchase Price.

      (l)    In any case in which this Section 11 requires that an 
adjustment in the Purchase Price be made effective as of a record date for a 
specified event, the Company may defer until the occurrence of such event 
the issuing to the holder of any Right exercised after such record date of 
the Common Shares and other capital stock or securities of the Company, if 
any, issuable upon such exercise over and above the Common Shares and other 
capital stock or securities of the Company, if any, issuable upon such 
exercise on the basis of the Purchase Price in effect prior to such 
adjustment; provided, however, that the Company will deliver to such holder 
an appropriate instrument evidencing such holder's right to receive such 
additional shares upon the occurrence of the event requiring such 
adjustment.

      (m)    Anything in this Section 11 to the contrary notwithstanding, 
the Company will be entitled to make such reductions in the Purchase Price, 
in addition to those adjustments expressly required by this Section 11, as 
and to the extent that it in its sole discretion determines to be advisable 
in order that any consolidation or subdivision of the Common Shares, 
issuance wholly for cash of any Common Shares at less than the current 
market price, issuance wholly for cash of Common Shares or securities that 
by their terms are convertible into or exchangeable for Common Shares, stock 
dividends, or issuance of rights, options, or warrants referred to 
hereinabove in this Section 11, hereafter made by the Company to holders of 
its Common Shares will not be taxable to such stockholders.

      Section 12.    Certificate of Adjusted Purchase Price or Number of 
Shares.  Whenever an adjustment is made pursuant to Section 11 or 13 hereof, 
the Company will promptly (a) prepare a certificate setting forth such 
adjustment, and a brief statement of the facts accounting for such 
adjustment, (b) file with the Rights Agent and with each transfer agent for 
the Common Shares a copy of such certificate, and (c) mail a brief summary 
thereof to each holder of a Rights Certificate (or if prior to the 
Distribution Date, to each holder of a certificate representing Common 
Shares) in accordance with Section 27 hereof.  The Rights Agent may rely on 
such certificate without further inquiry and may assume that no such 
adjustment has been made unless and until it will have received such 
certificate.

      Section 13.    Consolidation, Merger, or Sale or Transfer of Assets or 
Earning Power of the Company.

      (a)    In the event that, following the Shares Acquisition Date, 
directly or indirectly:

            (x)    the Company consolidates with, or merges with and into, 
      any other Person (other than a Subsidiary of the Company in a 
      transaction that complies with Section 14(b) hereof), and the Company 
      is not the continuing or surviving corporation of such consolidation 
      or merger; 

            (y)    any Person (other than a Subsidiary of the Company in a 
      transaction that complies with Section 14(b) hereof) consolidates with 
      the Company, or merges with and into the Company and the Company is 
      the continuing or surviving corporation of such merger, and in 
      connection with such merger, all or part of the Common Shares will be 
      changed into or exchanged for stock or other securities of any other 
      Person (or the Company) or cash or any other property;

            (z)    the Company sells or otherwise transfers (or one or more 
      of its Subsidiaries sells or otherwise transfers), in one or more 
      transactions, assets or earning power aggregating 50% or more of the 
      assets or earning power of the Company and its Subsidiaries (taken as 
      a whole) to any Person (other than to the Company or one or more of 
      its Subsidiaries, in one or more transactions that complies with 
      Section 14(b) hereof);

then, and in each such case, proper provision will be made so that (i) 
following the Distribution Date, and subject to Section 7(e) hereof, each 
holder of a Right will have the right to receive, upon the exercise thereof 
at the then current Purchase Price in accordance with the terms of this 
Agreement, such number of freely tradable Common Shares of the Principal 
Party (as hereinafter defined), free and clear of liens, rights of call or 
first refusal, encumbrances, and other adverse claims, as is equal to the 
result obtained by (1) multiplying the then current Purchase Price by the 
number of Common Shares for which a Right is exercisable immediately prior 
to the first occurrence of a Section 13 Event (or, if a Section 11(a)(ii) 
Event has occurred prior to the first occurrence of a Section 13 Event, 
multiplying the number of such shares for which a Right was exercisable 
immediately prior to the first occurrence of a Section 11(a)(ii) Event, by 
the Purchase Price in effect immediately prior to such first occurrence), 
and (2) dividing that product (which following the first occurrence of a 
Section 13 Event, will be referred to as the "Purchase Price" for each Right 
and for all purposes of this Agreement) by 50% of the current per share 
market price of the Common Shares of such Principal Party (determined 
pursuant to Section 11(d) hereof) on the date of consummation of such 
Section 13 Event; (ii) such Principal Party will thereafter be liable for, 
and will assume, by virtue of such consolidation, merger, sale, or transfer, 
all the obligations and duties of the Company pursuant to this Agreement; 
(iii) the term "Company" will thereafter be deemed to refer to such 
Principal Party, it being specifically intended that the provisions of 
Section 11 hereof will apply to such Principal Party; and (iv) such 
Principal Party will take such steps (including without limitation the 
reservation of a sufficient number of its Common Shares in accordance with 
Section 9 hereof) in connection with such consummation as may be necessary 
to assure that the provisions hereof will thereafter be applicable, as 
nearly as reasonably may be, in relation to the Common Shares thereafter 
deliverable upon the exercise of the Rights.

      (b)    "Principal Party" means

            (i)    in the case of any transaction described in clause (x) or 
      (y) of the first sentence of subsection (a) of this Section 13, the 
      Person that is the issuer of any securities into which Common Shares 
      of the Company are converted in such merger of consolidation, and if 
      no securities are so issued, the Person that is the other party to the 
      merger or consolidation (including, if applicable, the Company, if it 
      is the surviving corporation); and

            (ii)    in the case of any transaction described in clause (z) 
      of the first sentence of paragraph (a) of this Section 13, the Person 
      that is the party receiving the greatest portion of the assets or 
      earning power transferred pursuant to such transaction or 
      transactions;

provided, however, that in any such case (1) if the Common Shares of such 
Person are not at such time and have not been continuously over the 
preceding 12-month period registered under Section 12 of the Securities 
Exchange Act of l934, as amended (the "Exchange Act"), and such Person is a 
direct or indirect subsidiary or Affiliate of another Person, then 
"Principal Party" will refer to such other Person; (2) in case such Person 
is a subsidiary, directly or indirectly, or Affiliate of more than one 
Person, the Common Shares of two or more of which are and have been so 
registered, "Principal Party" will refer to whichever of such Persons is the 
issuer of the Common Shares having the greatest aggregate market value; and 
(3) in case such Person is owned, directly or indirectly, by a joint venture 
formed by two or more Persons that are not owned, directly or indirectly, by 
the same Person, the rules set forth in the preceding clauses (1) and (2) 
will apply to each of the chains of ownership having an interest in such 
joint venture as if such party were a "Subsidiary" of both or all of such 
joint ventures and the Principal Parties in each such chain will bear the 
obligations set forth in this Section 13 in the same ratio as their direct 
or indirect interests in such Person bear to the total of such interests.

      (c)    The Company will not consummate any such consolidation, merger, 
sale or transfer unless the Principal Party has a sufficient number of 
authorized Common Shares that have not been issued or reserved for issuance 
to permit the exercise in full of the Rights in accordance with this Section 
13 and unless prior thereto the Company and each Principal Party and each 
other Person who may become a Principal Party as a result of such 
consolidation, merger, sale, or transfer first execute and deliver to the 
Rights Agent a supplemental agreement providing for the terms set forth in 
paragraphs (a) and (b) of this Section 13 and further providing that, as 
soon as practicable after the date of any Section 13 Event, the Principal 
Party at its own expense will:

            (i)    prepare and file a registration statement under the 
      Securities Act with respect to the Rights and the securities 
      purchasable upon the exercise of the Rights, will use its best efforts 
      to cause such registration statement to become effective as soon as 
      practicable after such filing and will use its best efforts to cause 
      such registration statement to remain effective (with a prospectus 
      meeting the requirements of the Securities Act) until the Expiration 
      Date;

            (ii)    use its best efforts to qualify or register the Rights 
      and the securities purchasable upon exercise of the Rights under the 
      blue sky laws of such jurisdictions as may be necessary;

            (iii)    use its best efforts to list (or continue the listing 
      of) the Rights and the securities purchasable upon exercise of the 
      Rights on a national securities exchange or to meet the eligibility 
      requirements for quotation on NASDAQ; and

            (iv)    deliver to holders of the Rights historical financial 
      statements for the Principal Party and each of its Affiliates, which 
      financial statements comply in all material respects with the 
      requirements for registration on Form 10 under the Exchange Act.

The provisions of this Section 13 will similarly apply to successive mergers 
or consolidations or sales or other transfers.  If a Section 13 Event occurs 
at any time after the occurrence of a Section 11(a)(ii) Event, the Rights 
that have not theretofore been exercised will thereafter become exercisable 
solely in the manner described in paragraph (a) of this Section 13.

      Section 14.    Additional Covenants.

      (a)    The Company covenants and agrees that it will not at any time 
after the Distribution Date (i) consolidate with, (ii) merge with or into, 
or (iii) sell or transfer, in one or more transactions, assets or earning 
power aggregating more than 50% of the assets or earning power of the 
Company and its subsidiaries taken as a whole, to any other Person, if at 
the time of or after such consolidation, merger, or sale there are any 
charter or by-law provisions or any rights, warrants, or other instruments 
outstanding or any other action taken or circumstances extant that would 
diminish or otherwise eliminate the benefits intended to be afforded by the 
Rights.  The Company will not consummate any such consolidation, merger, or 
sale unless the Company and such other Person first execute and deliver to 
the Rights Agent a supplemental agreement evidencing compliance with this 
subsection.

      (b)    The Company covenants and agrees that, after the Distribution 
Date, it will not, except as permitted by Section 24 or Section 28 hereof, 
take any action if at the time such action is taken it is reasonably 
foreseeable that such action will substantially diminish or otherwise 
eliminate the benefits intended to be afforded by the Rights.

      Section 15.    Fractional Rights and Fractional Shares.

      (a)    The Company will not be required to issue fractions of Rights, 
except prior to the Distribution Date as provided in Section 11(i), or to 
distribute Rights Certificates that evidence fractional Rights.  In lieu of 
such fractional Rights, there will be paid to the registered holders of the 
Rights Certificates with regard to which such fractional Rights would 
otherwise be issuable, an amount in cash equal to the same fraction of the 
current market value of a whole Right.  For the purposes of this Section 
15(a), the current market value of a whole Right will be the closing price 
of the Rights for the Trading Day immediately prior to the date on which 
such fractional Rights would have been otherwise issuable.  The closing 
price for any day will be the last sale price, regular way, or in case no 
such sale takes place on such day, the average of the closing bid and asked 
prices, regular way, in either case as reported in the principal 
consolidated transaction reporting system with respect to securities listed 
or admitted to trading on the New York Stock Exchange, or if the Rights are 
not listed or admitted to trading on the New York Stock Exchange, as 
reported in the principal consolidated transaction reporting system with 
respect to securities listed on the principal national securities exchange 
on which the Rights are listed or admitted to trading, or if the Rights are 
not listed or admitted to trading on any national securities exchange, the 
last quoted price, or if not so quoted, the average of the high bid and low 
asked prices in the over-the-counter market, as reported by NASDAQ or such 
other system then in use, or if on any such date the Rights are not quoted 
by any such organization, the average of the closing bid and asked prices as 
furnished by a professional market maker making a market in the Rights 
selected by the Board of Directors of the Company.  If on any such date no 
such market maker is making a market in the Rights, the fair value of the 
Rights on such date as determined in good faith by the Board of Directors of 
the Company will be used.

      (b)    The Company will not be required to issue fractions of Common 
Shares upon exercise of the Rights or to distribute certificates that 
evidence fractional Common Shares.  In lieu of fractional Common Shares, the 
Company will pay to the registered holders of Rights Certificates at the 
time such Rights are exercised as herein provided an amount in cash equal to 
the same fraction of the current market value of one Common Share.  For the 
purposes of this Section 15(b), the current market value of a Common Share 
will be the closing price of a Common Share (as determined pursuant to 
Section 11(d)(ii) hereof) for the Trading Day immediately prior to the date 
of such exercise.

      (c)    The holder of a Right by the acceptance of the Right expressly 
waives his right to receive any fractional Rights or any fractional shares 
upon exercise of a Right.

      Section 16.    Rights of Action.  Excepting the rights of action given 
to the Rights Agent under Section 19 hereof, all rights of action in respect 
of this Agreement are vested in the respective registered holders of the 
Rights Certificates (and prior to the Distribution Date, the registered 
holders of the Common Shares); and any registered holder of any Rights 
Certificate (or prior to the Distribution Date, of the Common Shares), 
without the consent of the Rights Agent or of the holder of any other Rights 
Certificate (or, prior to the Distribution Date, of the Common Shares), may, 
in his own behalf and for his own benefit, enforce, and may institute and 
maintain any suit, action, or proceeding against the Company to enforce, or 
otherwise act in respect of, his right to exercise the Rights evidenced by 
such Rights Certificate in the manner provided in such Rights Certificate 
and in this Agreement.  Without limiting the foregoing or any remedies 
available to the holders of Rights, it is specifically acknowledged that the 
holders of Rights would not have an adequate remedy at law for any breach of 
this Agreement and will be entitled to specific performance of the 
obligations under, and injunctive relief against actual or threatened 
violations of the obligations of any Person subject to, this Agreement. 
Holders of Rights will be entitled to recover the reasonable costs and 
expenses, including attorneys' fees, incurred by them in any action to 
enforce the provisions of this Agreement.

      Section 17.    Agreement of Rights Holders.  Every holder of a Right, 
by accepting the same, consents and agrees with the Company and the Rights 
Agent and with every other holder of a Right that:

      (a)    prior to the Distribution Date, the Rights will be transferable 
only in connection with the transfer of the Common Shares;

      (b)    after the Distribution Date, the Rights Certificates are 
transferable only on the registry books of the Rights Agent if surrendered 
at the principal office of the Rights Agent, duly indorsed or accompanied by 
a proper instrument of transfer;

      (c)    subject to Section 6 and Section 7(f) hereof, the Company and 
the Rights Agent may deem and treat the Person in whose name the Rights 
Certificate (or prior to the Distribution Date, the associated Common Shares 
certificate) is registered as the absolute owner thereof and of the Rights 
evidenced thereby (notwithstanding any notations of ownership or writing on 
the Rights Certificates or the associated Common Shares certificate made by 
anyone other than the Company or the Rights Agent) for all purposes 
whatsoever, and neither the Company nor the Rights Agent will be affected by 
any notice to the contrary; and

      (d)    notwithstanding anything in this Agreement to the contrary, 
neither the Company nor the Rights Agent will have any liability to any 
holder of a Right or a beneficial interest in a Right or other Person as a 
result of its inability to perform any of its obligations under this 
Agreement by reason of any preliminary or permanent injunction or other 
order, decree, or ruling issued by a court of competent jurisdiction or by a 
governmental, regulatory, or administrative agency or commission, or any 
statute, rule, regulation, or executive order promulgated or enacted by any 
governmental authority, prohibiting or otherwise restraining performance of 
such obligation; provided, however, the Company must use its best efforts to 
have any such order, decree or ruling lifted or otherwise overturned as soon 
as possible.

      Section 18.  Rights Certificate Holder Not Deemed a Stockholder.  No 
holder, as such, of any Rights Certificate will be entitled to vote, receive 
dividends or be deemed for any purpose to be the holder of the Common Shares 
or any other securities of the Company that may at any time be issuable on 
the exercise of the Rights represented thereby, nor will anything contained 
herein or in any Rights Certificate be construed to confer upon the holder 
of any Rights Certificate, as such, any of the rights of a stockholder of 
the Company or any right to vote for the election of directors or upon any 
matter submitted to stockholders at any meeting thereof, or to give or 
withhold consent to any corporate action, or to receive notice of meetings 
or other actions affecting stockholders (except as provided in Section 26 
hereof), or to receive dividends or subscription rights, or otherwise, until 
the Right or Rights evidenced by such Rights Certificate have been exercised 
in accordance with the provisions hereof.

      Section 19.  Concerning the Rights Agent.  The Company agrees to pay 
to the Rights Agent reasonable compensation for all services rendered by it 
hereunder and, from time to time, on demand of the Rights Agent, its 
reasonable expenses and counsel fees and other disbursements incurred in the 
administration and execution of this Agreement and the exercise and 
performance of its duties hereunder.  The Company also agrees to indemnify 
the Rights Agent for, and to hold it harmless against, any loss, liability, 
or expense, incurred without gross negligence, bad faith, or willful 
misconduct on the part of the Rights Agent, for anything done or omitted by 
the Rights Agent in connection with the acceptance and administration of 
this Agreement, including the costs and expenses of defending against any 
claim of liability arising directly therefrom.

      The Rights Agent will be protected and will incur no liability for or 
in respect of any action taken, suffered, or omitted by it in connection 
with its administration of this Agreement in reliance upon any Rights 
Certificate or certificate for Common Shares or other securities of the 
Company, instrument of assignment or transfer, power of attorney, 
endorsement, affidavit, letter, notice, direction, consent, certificate, 
statement, or other paper or document believed by it to be genuine and to be 
signed, executed, and if necessary, verified or acknowledged, by the proper 
Person or Persons.

      Section 20.  Merger or Consolidation or Change of Name of Rights 
Agent.  Any corporation into which the Rights Agent or any successor Rights 
Agent may be merged or with which it may be consolidated, or any corporation 
resulting from any merger or consolidation to which the Rights Agent or any 
successor Rights Agent may be a party, or any corporation succeeding to the 
stock transfer or corporate trust business of the Rights Agent or any 
successor Rights Agent, will be the successor to the Rights Agent under this 
Agreement without the execution or filing of any paper or any further act on 
the part of any of the parties hereto, provided that such corporation would 
be eligible for appointment as a successor Rights Agent under the provisions 
of Section 22 hereof.  In case at the time such successor Rights Agent 
succeeds to the agency created by this Agreement, any of the Rights 
Certificates will have been countersigned but not delivered, any such 
successor Rights Agent may adopt the countersignature of the predecessor 
Rights Agent and deliver such Rights Certificates so countersigned; and in 
case at that time any of the Rights Certificates have been countersigned, 
any successor Rights Agent may countersign such Rights Certificates either 
in the name of the predecessor Rights Agent or in the name of the successor 
Rights Agent; and in all such cases such Rights Certificates will have the 
full force provided in the Rights Certificates and in this Agreement.

      In case at any time the name of the Rights Agent is changed and at 
such time any of the Rights Certificates have been countersigned but not 
delivered, the Rights Agent may adopt the countersignature under its prior 
name and deliver Rights Certificates so countersigned; and in case at that 
time any of the Rights Certificates have not been countersigned, the Rights 
Agent may countersign such Rights Certificates either in its prior name or 
in its changed name; and in all such cases such Rights Certificates will 
have the full force provided in the Rights Certificates and in this 
Agreement.

      Section 21.  Duties of Rights Agent.  The Rights Agent undertakes the 
duties and obligations imposed by this Agreement upon the following terms 
and conditions, by all of which the Company and the holders of Rights 
Certificates, by their acceptance thereof, will be bound:

      (a)    The Rights Agent may consult with legal counsel (who may be 
legal counsel for the Company), and the opinion of such counsel will be full 
and complete authorization and protection to the Rights Agent as to any 
action taken or omitted by it in good faith and in accordance with such 
opinion.

      (b)    Whenever in the performance of its duties under this Agreement 
the Rights Agent deems it necessary or desirable that any fact or matter 
(including without limitation the identity of any Acquiring Person) be 
proved or established by the Company prior to taking or suffering any action 
hereunder, such fact or matter (unless other evidence in respect thereof is 
specifically prescribed herein) may be deemed to be conclusively proved and 
established by a certificate signed by the Chief Executive Officer, 
President, any Vice President, the Treasurer, the Chief Financial Officer or 
the Secretary of the Company and delivered to the Rights Agent; and such 
certificate will be full authorization to the Rights Agent for any action 
taken or suffered in good faith by it under the provisions of this Agreement 
in reliance upon such certificate.

      (c)    The Rights Agent will be liable hereunder to the Company and 
any other Person only for its own gross negligence, bad faith, or willful 
misconduct.

      (d)    The Rights Agent will not be liable for or by reason of any of 
the statements of fact or recitals contained in this Agreement or in the 
Rights Certificates (except its countersignature thereof) or be required to 
verify the same, but all such statements and recitals are and will be deemed 
to have been made by the Company only.

      (e)    The Rights Agent will not be under any responsibility in 
respect of the validity of this Agreement or the execution and delivery 
hereof (except the due execution hereof by the Rights Agent) or in respect 
of the validity or execution of any Rights Certificate (except its 
countersignature thereof); nor will it be responsible for any breach by the 
Company of any covenant or condition contained in this Agreement or in any 
Rights Certificate; nor will it be responsible for any adjustment required 
under the provisions of Section 11 or Section 13 hereof or for the manner, 
method, or amount of any adjustment or the ascertaining of the existence of 
facts that would require any such adjustment (except with respect to the 
exercise of Rights evidenced by Rights Certificates after receipt of a 
certificate furnished pursuant to Section 12 describing any such 
adjustment); nor will it be responsible for any determination by the Board 
of Directors of the Company of the current market value of the Rights or 
Common Shares; nor will it by any act hereunder be deemed to make any 
representation or warranty as to the authorization or reservation of any 
Common Shares or other securities to be issued pursuant to this Agreement or 
any Rights Certificate or as to whether any Common Shares or other 
securities will, when issued, be validly authorized and issued, fully paid, 
and nonassessable.

      (f)    The Company agrees that it will perform, execute, acknowledge, 
and deliver or cause to be performed, executed, acknowledged, and delivered 
all such further and other acts, instruments, and assurances as may 
reasonably be required by the Rights Agent for the carrying out or 
performing by the Rights Agent of the provisions of this Agreement.

      (g)    The Rights Agent is hereby authorized and directed to accept 
instructions with respect to the performance of its duties hereunder from 
the Chief Executive Officer, President, any Vice President, the Treasurer, 
the Chief Financial Officer or the Secretary of the Company, and to apply to 
such officers for advice or instructions in connection with its duties, and 
it will not be liable for any action taken or suffered by it in good faith 
in accordance with instructions of any such officer or for any delay in 
acting while waiting for those instructions.  Any application by the Rights 
Agent for written instructions from the Company may, at the option of the 
Rights Agent, set forth in writing any action proposed to be taken or 
omitted by the Rights Agent under this Rights Agreement and the date on 
and/or after which such action will be taken or such omission will be 
effective.  The Rights Agent will not be liable for any action taken by, or 
omission of, the Rights Agent in accordance with a proposal included in any 
such application on or after the date specified in such application (which 
date will not be less than ten Business Days after the date the Chief 
Executive Officer, President, any Vice President, the Treasurer, the Chief 
Financial Officer or the Secretary of the Company actually receives such 
application, unless any such officer of the Company consents in writing to 
an earlier date) unless, prior to taking any such action (or the effective 
date in the case of an omission), the Rights Agent receives written 
instructions in response to such application specifying the action to be 
taken or omitted.

      (h)    The Rights Agent and any stockholder, director, officer, or 
employee of the Rights Agent may buy, sell, or deal in any of the Rights or 
other securities of the Company or become pecuniarily interested in any 
transaction in which the Company may be interested, or contract with or lend 
money to the Company or otherwise act as fully and freely as though it were 
not Rights Agent under this Agreement.  Nothing herein will preclude the 
Rights Agent from acting in any other capacity for the Company or for any 
other legal entity.

      (i)    The Rights Agent may execute and exercise any of the rights or 
powers hereby vested in it or perform any duty hereunder either itself or by 
or through its attorneys or agents, and the Rights Agent will not be 
answerable or accountable for any act, default, neglect, or misconduct of 
any such attorneys or agents or for any loss to the Company resulting from 
any the act, default, neglect, or misconduct of any such attorney or agent, 
provided reasonable care was exercised in the selection and continued 
employment thereof.

      (j)    No provision of this Agreement will require the Rights Agent to 
expend or risk its own funds or otherwise incur any financial liability in 
the performance of any of its duties hereunder or in the exercise of its 
rights if there will be reasonable grounds for believing that repayment of 
such funds or adequate indemnification against such risk or liability is not 
reasonably assured to it.

      (k)    If with respect to any Rights Certificate surrendered to the 
Rights Agent for exercise or transfer, the certification attached to the 
form of assignment or form of election to purchase, as the case may be, has 
either not been completed or indicates an affirmative response to clause l 
and/or 2 thereof, the Rights Agent will not take any further action with 
respect to such requested exercise of transfer without first consulting with 
the Company.

      Section 22.  Change of Rights Agent.  The Rights Agent or any 
successor Rights Agent may resign and be discharged from its duties under 
this Agreement upon 30 days' prior notice in writing to the Company and to 
each transfer agent of the Common Shares in accordance with Section 27 
hereof, and to the holders of the Rights Certificates by first-class mail at 
the expense of the Company.

      The Company may remove the Rights Agent or any successor Rights Agent 
upon 30 days' prior notice in writing sent to the Rights Agent or successor 
Rights Agent, as the case may be, and each transfer agent of the Common 
Shares in accordance with Section 27 hereof, and to the holders of the 
Rights Certificates by first-class mail.

      If the Rights Agent resigns or is removed or otherwise becomes 
incapable of acting, the Company will appoint a successor to the Rights 
Agent.  If the Company fails to make such appointment within a period of 30 
days after giving notice of such removal or after it has been notified in 
writing of such resignation or incapacity by the resigning or incapacitated 
Rights Agent or by the holder of a Rights Certificate (who will, with such 
notice, submit his Rights Certificate for inspection by the Company), then 
the registered holder of any Rights Certificate may apply to any court of 
competent jurisdiction for the appointment of a new Rights Agent.

      Any successor Rights Agent, whether appointed by the Company or by a 
court, will be an entity organized and doing business under the laws of the 
United States or any state of the United States (so long as such entity is 
in good standing), and which is authorized under such laws to exercise 
corporate trust or stock transfer powers and is subject to supervision or 
examination by federal or state authority, and which has at the time of its 
appointment as Rights Agent a combined capital and surplus of at least $100 
million.  After appointment, the successor Rights Agent will be vested with 
the same powers, rights, duties and responsibilities as if it had been 
originally named as Rights Agent without further act or deed; but the 
predecessor Rights Agent will deliver and transfer to the successor Rights 
Agent any property at the time held by it hereunder, and execute and deliver 
any further assurance, conveyance, act, or deed necessary for the purpose.  
Not later than the effective date of any such appointment, the Company will 
file notice thereof in writing with the predecessor Rights Agent and each 
transfer agent of the Common Shares, and mail a notice thereof in writing to 
the registered holders of the Rights Certificates.  Failure to give any 
notice provided for in this Section 22, however, or any defect therein, will 
not affect the legality or validity of the resignation or removal of the 
Rights Agent or the appointment of the successor Rights Agent, as the case 
may be.

      Section 23.  Issuance of New Rights Certificates.  Notwithstanding any 
of the provisions of this Agreement or of the Rights to the contrary, the 
Company at its option may issue new Rights Certificates in such form as may 
be approved by its Board of Directors to reflect any adjustment or change in 
the Purchase Price and the number or kind or class of shares or other 
securities or property purchasable under the Rights Certificates made in 
accordance with the provisions of this Agreement.

      Section 24.  Redemption.

      (a)    The Rights may be redeemed by action of the Board of Directors 
pursuant to paragraph (b) of this Section 24, and will not be redeemed in 
any other manner.

      (b)    The Board of Directors of the Company may, at its option, at 
any time prior to the earliest of (x) the close of business on the tenth day 
following a Shares Acquisition Date, or (y) 5:00 p.m., E.S.T., on the Final 
Expiration Date, redeem all but not less than all of the then outstanding 
Rights at a redemption price of $0.001 per Right, appropriately adjusted to 
reflect any stock split, stock dividend or similar transaction occurring 
after the date hereof.  The redemption of the Rights by the Board of 
Directors may be made effective at such time, on such basis, and with such 
conditions as the Board of Directors in its sole discretion may establish.

      (c)    Immediately upon the action of the Board of Directors of the 
Company ordering the redemption of the Rights pursuant to paragraph (b) of 
this Section 24, and without any further action and without any notice, the 
right to exercise the Rights will terminate and the only right thereafter of 
the holders of Rights will be to receive the Redemption Price.  The Company 
will promptly give public notice of any such redemption; provided, however, 
that the failure to give, or any defect in, any such notice will not affect 
the validity of such redemption.  Within 10 days after such action ordering 
the redemption of the Rights pursuant to paragraph (b) or (c), as the case 
may be, the Company will mail a notice of redemption to all the holders of 
the then outstanding Rights at their last addresses as they appear upon the 
registry books of the Rights Agent, or prior to the Distribution Date, on 
the registry books of the transfer agent for the Common Shares.  Any notice 
mailed in the manner herein provided will be deemed duly given, whether or 
not the holder receives the notice.  Each such notice of redemption will 
state the method by which the payment of the Redemption Price will be made.  
The Company may, at its option, pay the Redemption Price in cash, Common 
Shares (based on the current per share market price of the Common Shares as 
of the time of redemption) or any other form of consideration deemed 
appropriate by the Board of Directors.  Notwithstanding anything contained 
in this Agreement to the contrary, the Rights will not be exercisable after 
the first occurrence of a Section 11(a)(ii) Event until such time as the 
Company's right of redemption under Section 24(b) has expired.

      Section 25.  Exchange.

      (a)    The Company's Board of Directors, at its option, at any time 
after the occurrence of a Section 11(a)(ii) Event may exchange all or part 
of the then outstanding and exercisable Rights (which will not include 
Rights that have become void pursuant to the provisions of Section 7(e) 
hereof) for Common Shares at an exchange ratio of one Common Share per 
Right, appropriately adjusted to reflect any stock split, stock dividend, or 
similar transaction occurring after the date hereof (such exchange ratio 
being hereinafter referred to as the "Exchange Ratio").  Notwithstanding the 
foregoing, the Company's Board of Directors may not effect such exchange at 
any time after any Person (other than the Company, any Subsidiary of the 
Company, any employee benefit plan of the Company or any such Subsidiary, or 
any entity holding Common Shares for or pursuant to the terms of any such 
plan), together with all Affiliates and Associates of such Person, becomes 
the Beneficial Owner of 50% or more of the Common Shares then outstanding.

      (b)    Immediately upon the action of the Company's Board of Directors 
ordering the exchange of any Rights pursuant to subsection (a) of this 
Section 25, and without any further action and without any notice, the right 
to exercise such Rights will terminate and the only right thereafter of a 
holder of such Rights will be to receive that number of Common Shares equal 
to the number of such Rights held by such holder multiplied by the Exchange 
Ratio.  The Company will promptly give public notice of any such exchange; 
provided, however, that the failure to give, or any defect in, such notice 
will not affect the validity of such exchange.  The Company promptly will 
mail a notice of any such exchange to all of the holders of such Rights at 
their last addresses as they appear upon the registry books of the Rights 
Agent.  Any notice which is mailed in the manner herein provided will be 
deemed given, whether or not the holder receives the notice.  Each such 
notice of exchange will state the method by which the exchange of the Common 
Shares for Rights will be effected and, in the event of any partial 
exchange, the number of Rights that will be exchanged.  Any partial exchange 
will be effected pro rata based on the number of Rights (other than Rights 
that have become void pursuant to the provisions of Section 7(e) hereof) 
held by each holder of Rights.

      (c)    In the event that there are not sufficient Common Shares issued 
but not outstanding or authorized but unissued to permit any exchange of 
Rights as contemplated 

in accordance with this Section 25, the Company will take all such action as 
may be necessary to authorize additional Common Shares for issuance upon 
exchange of the Rights.

      (d)    The Company will not be required to issue fractions of Common 
Shares or to distribute certificates that evidence fractional Common Shares.  
In lieu of such fractional Common Shares, the Company will pay to the 
registered holders of the Rights Certificates with regard to which such 
fractional Common Shares would otherwise be issuable, an amount in cash 
equal to the same fraction of the current market value of a whole Common 
Share.  For the purposes of this paragraph (e), the current market value of 
a whole Common Share will be the closing price of a Common Share (as 
determined pursuant to Section 11(d)(i) hereof) for the Trading Day 
immediately prior to the date of exchange pursuant to this Section 25.

      Section 26.  Notice of Certain Events.

      (a)    In case the Company proposes, at any time after the 
Distribution Date, (i) to pay any dividend payable in stock of any class to 
the holders of its Common Shares or to make any other distribution to the 
holders of its Common Shares, (ii) to offer to the holders of its Common 
Shares rights or warrants to subscribe for or to purchase any additional 
Common Shares or shares of stock of any class or any other securities, 
rights, or options, (iii) to effect any reclassification of its Common 
Shares (other than a reclassification involving only the subdivision of 
outstanding Common Shares), (iv) to effect any consolidation or merger into 
or with, or to effect any sale or other transfer (or to permit one or more 
of its Subsidiaries to effect any sale or other transfer), in one or more 
transactions, of 50% or more of the assets or earning power of the Company 
and its Subsidiaries (taken as a whole) to, any other Person, (v) to effect 
the liquidation, dissolution, or winding-up of the Company, or (vi) to 
declare or pay any dividend on the Common Shares payable in Common Shares or 
to effect a subdivision, combination or consolidation of the Common Shares 
(by reclassification or otherwise than by payment of dividends in Common 
Shares), then, in each such case, the Company will give to each holder of a 
Rights Certificate, in accordance with Section 27 hereof, a notice of such 
proposed action, which will specify the record date for the purposes of such 
stock dividend, or distribution of rights or warrants, or the date on which 
such reclassification, consolidation, merger, sale, transfer, liquidation, 
dissolution, or winding-up is to take place and the date of participation 
therein by the holders of the Common Shares, if any such date is to be 
fixed, and such notice will be so given in the case of any action covered by 
clause (i) or (ii) above at least 10 days prior to the record date for 
determining holders of the Common Shares for purposes of such action, and in 
the case of any such other action, at least 10 days prior to the date of the 
taking of such proposed action or the date of participation therein by the 
holders of the Common Shares, whichever will be the earlier.

      (b)    In case any of Section 11(a)(ii) Event will occur, (i) the 
Company will as soon as practicable thereafter give to each holder of a 
Rights Certificate, in accordance with Section 27 hereof, a notice of the 
occurrence of such event, which notice will describe such event and the 
consequences of such event to holders of Rights under Section 11(a)(ii) 
hereof, and (ii) all references in the preceding paragraph to Common Shares 
will be deemed thereafter to refer to Common Shares or, if appropriate, 
other securities.

      Section 27.  Notices.  Any notice or demand authorized by this 
Agreement to be given or made by the Rights Agent or by the holder of any 
Rights Certificate to or on the Company will be sufficiently given or made 
if sent by reputable overnight courier or by registered, certified, or 
first-class mail, postage or delivery charges prepaid and addressed (until 
another address is filed in writing with the Rights Agent) as follows:

            Hemagen Diagnostics, Inc.
            40 Bear Hill Road
            Waltham, Massachusetts 02451
            Attention:  Chief Executive Officer

      Any notice or demand authorized by this Agreement to be given or made 
by the Company or by the holder of any Rights Certificate to or on the 
Rights Agent will be sufficiently given or made if sent by reputable 
overnight courier or by registered, certified, or first-class mail, postage 
or delivery charges prepaid and addressed (until another address is filed in 
writing with the Company) as follows:

            Continental Stock Transfer and Trust Company
            2 Broadway
            New York, New York  10004
            Attention: Compliance Department

Notices or demands authorized by this Agreement to be given or made by the 
Company or the Rights Agent to the holder of any Rights Certificate or 
certificate representing Common Shares will be sufficiently given or made if 
sent by first-class mail, postage prepaid, addressed to such holder at the 
address of such holder as shown on the registry books of the Company.

      Section 28.  Supplements and Amendments.  Prior to the Distribution 
Date, if the Company so directs, the Company and the Rights Agent will 
supplement or amend any provision of this Agreement without the approval of 
any holders of certificates representing Common Shares.  From and after the 
Distribution Date, if the Company so directs, the Company and the Rights 
Agent will supplement or amend this Agreement without the approval of any 
holders of Rights Certificates in order (i) to cure any ambiguity, (ii) to 
correct or supplement any provision contained herein that may be defective 
or inconsistent with any other provisions herein, (iii) to shorten or 
lengthen any time period hereunder, or (iv) to change or supplement the 
provisions hereunder in any manner that the Company may deem necessary or 
desirable and that will not adversely affect the interests of the holders of 
Rights Certificates (other than an Acquiring Person or any Affiliate or 
Associate of an Acquiring Person).

      Section 29.  Successors.  All the covenants and provisions of this 
Agreement by or for the benefit of the Company or the Rights Agent will bind 
and inure to the benefit of their respective successors and assigns 
hereunder.

      Section 30.  Benefits of this Agreement.  Nothing in this Agreement 
will be construed to give to any Person or corporation other than the 
Company, the Rights Agent and the registered holders of the Rights 
Certificates (and prior to the Distribution Date, of the Common Shares) any 
legal or equitable right, remedy or claim under this Agreement; but this 
Agreement will be for the sole and exclusive benefit of the Company, the 
Rights Agent, and the registered holders of the Rights Certificates (and, 
prior to the Distribution Date, of the Common Shares).

      Section 31.  Severability.  If any term, provision, covenant or 
restriction of this Agreement is held by a court of competent jurisdiction 
or other authority to be invalid, void or unenforceable, the remainder of 
the terms, provisions, covenants and restrictions of this Agreement will 
remain in full force and effect and will in no way be affected, impaired or 
invalidated.

      Section 32.  Governing Law.  This Agreement and each Rights 
Certificate issued hereunder will be deemed to be a contract made under the 
laws of the State of Delaware and for all purposes will be governed by and 
construed in accordance with the laws of such State applicable to contracts 
to be made and performed entirely within such State.

      Section 33.  Counterparts.  This Agreement may be executed in any 
number of counterparts and each of such counterparts will for all purposes 
be deemed to be an original, and all such counterparts will together 
constitute but one and the same agreement.

      Section 34.  Descriptive Headings.  Descriptive headings of the 
several Sections of this Agreement are inserted for convenience only and 
will not control or affect the meaning or construction of any of the 
provisions hereof.

               [ Remainder of Page Intentionally Left Blank ]


      IN WITNESS WHEREOF, the parties hereto have caused this Agreement to 
be duly executed and attested, as an agreement under seal, as of the date 
first above written.

                                       HEMAGEN DIAGNOSTICS, INC.



                                       By  /s/ Carl Franzblau
                                         ---------------------------
                                         Name:  Carl Franzblau
                                         Title:  Chief Executive Officer




                                       CONTINENTAL STOCK TRANSFER
                                       & TRUST COMPANY,
                                       as Rights Agent



                                       By  /s/ William F. Seegraber
                                         ----------------------------
                                         William F. Seegraber
                                         Vice President



                                               Exhibit A to Rights Agreement

                        [Form of Rights Certificate]




Certificate No. R-                                           ________ Rights


      NOT EXERCISABLE AFTER JANUARY 27, 2009, OR EARLIER IF NOTICE OF 
      REDEMPTION OR EXCHANGE OCCURS.  THE RIGHTS ARE SUBJECT, AT THE OPTION 
      OF THE COMPANY, TO REDEMPTION AT $0.001 PER RIGHT AND TO EXCHANGE ON 
      THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.  UNDER CERTAIN 
      CIRCUMSTANCES, RIGHTS BENEFICIALLY OWNED BY AN ACQUIRING PERSON (AS 
      SUCH TERM IS DEFINED IN THE RIGHTS AGREEMENT) AND ANY SUBSEQUENT 
      HOLDER OF SUCH RIGHTS MAY BECOME NULL AND VOID.


                             RIGHTS CERTIFICATE

                          HEMAGEN DIAGNOSTICS, INC.


      This certifies that                             , or registered 
assigns, is the registered owner of the number of Rights set forth above, 
each of which entitles the owner thereof, subject to the terms, provisions, 
and conditions of the Rights Agreement, dated as of January 27, 1999 (the 
"Rights Agreement"), by and between Hemagen Diagnostics, Inc. (the 
"Company"), a Delaware corporation, and Continental Stock Transfer and Trust 
Company (the "Rights Agent"), to purchase from the Company at any time after 
the Distribution Date (as defined in the Rights Agreement) and prior to 5:00 
P.M., New York City time, on January 27, 2009, at the office of the Rights 
Agent designated for such purpose, or at the office of its successor as 
Rights Agent designated for such purpose, one share of Common Stock, par 
value $0.01 per share (the "Common Shares"), of the Company, at a purchase 
price of $4.00 per Common Share (the "Purchase Price"), upon presentation 
and surrender of this Rights Certificate with the Form of Election to 
Purchase duly executed.  The number of Rights evidenced by this Rights 
Certificate (and the number of Common Shares that may be purchased upon 
exercise hereof) set forth above, and the Purchase Price set forth above, 
are the number of Rights and Purchase Price as of January 27, 1999, based on 
the Common Shares as constituted at such date.  As provided in the Rights 
Agreement, the Purchase Price and the number of Common Shares that may be 
purchased upon the exercise of the Rights evidenced by this Rights 
Certificate are subject to modification and adjustment upon the happening of 
certain events.

      This Rights Certificate is subject to all of the terms, provisions, 
and conditions of the Rights Agreement, which terms, provisions, and 
conditions are hereby incorporated herein by reference and made a part 
hereof and to which Rights Agreement reference is hereby made for a full 
description of the rights, limitations of rights, obligations, duties, and 
immunities of the Rights Agent, the Company and the holders of the Rights 
Certificates.  Copies of the Rights Agreement are on file at the principal 
executive offices of the Company and the above-mentioned office of the 
Rights Agent.

      This Rights Certificate, with or without other Rights Certificates, 
may be surrendered at the principal office of the Rights Agent in exchange 
for another Rights Certificate or Rights Certificates of like tenor and date 
evidencing Rights entitling the holder to purchase the same aggregate number 
of Common Shares as the Rights evidenced by the Rights Certificate or Rights 
Certificates surrendered entitled such holder to purchase.  If this Rights 
Certificate is exercised in part, the holder will be entitled to receive 
upon surrender hereof another Rights Certificate or Rights Certificates for 
the number of whole Rights not exercised.

      Subject to the provisions of the Rights Agreement, the Rights 
evidenced by this Certificate (i) may be redeemed by the Company at its 
option at a redemption price of $0.001 per Right, or (ii) may be exchanged 
in whole or in part by the Company, at its option, for Common Shares.

      No fractional Common Shares will be issued upon the exercise of any 
Right or Rights evidenced hereby, but in lieu thereof a cash payment will be 
made, as provided in the Rights Agreement.

      No holder of this Rights Certificate, as such, will be entitled to 
vote or receive dividends or be deemed for any purpose the holder of the 
Common Shares or of any other securities of the Company that may at any time 
be issuable on the exercise hereof, nor will anything contained in the 
Rights Agreement or herein be construed to confer upon the holder hereof, as 
such, any of the rights of a stockholder of the Company or any right to vote 
for the election of directors or upon any matter submitted to stockholders 
at any meeting thereof, or to give or withhold consent to any corporate 
action, or to receive notice of meetings or other actions affecting 
stockholders (except as provided in the Rights Agreement), or to receive 
dividends or subscription rights, or otherwise, until the Right or Rights 
evidenced by this Rights Certificate have been exercised as provided in the 
Rights Agreement.

      This Rights Certificate will not be valid or obligatory for any 
purpose until it is countersigned by the Rights Agent.

      Dated: ____________, ____.

                                       HEMAGEN DIAGNOSTICS, INC.



                                       By 
                                         ----------------------------
                                         Name:
                                         Title:



Continental Stock Transfer & Trust Company



- -----------------------------
Authorized Officer


                [Form of Reverse Side of Rights Certificate]


                             FORM OF ASSIGNMENT
                             ------------------


(To be executed by the registered holder if such
holder desires to transfer the Rights Certificate.)


      FOR VALUE RECEIVED                                         
hereby sells, assigns, and transfers to                                  ___
________________________                                                    
                (Please print name and address of transferee)
________________________                                                    
this Rights Certificate, together with all right, title, and interest 
therein, and does hereby irrevocably constitute and appoint ________________ 
as attorney, to transfer the within Rights Certificate on the books of 
Hemagen Diagnostics, Inc., with full power of substitution.


Dated: _______________, _____                                      __
                                                 (Signature)


Medallion Signature Guaranty:


- --------------------------------------------------------------------------

                          Assignment Certification
                          ------------------------

      The undersigned hereby certifies by checking the appropriate boxes 
that:

      (l)    The Rights evidenced by this Rights Certificate [  ] are [  ] 
are not being sold, assigned, and transferred by or on behalf of a Person 
who is or was an Acquiring Person or an Affiliate or Associate of any such 
Acquiring Person (as such term is defined pursuant to the Rate Agreement);

      (2)    After due inquiry and to the best knowledge of the undersigned, 
he, she, or it [  ] did [  ] did not acquire the Rights evidenced by this 
Rights Certificate from any person who is or was an Acquiring Person or an 
Affiliate or Associate of an Acquiring Person.


Dated: _______________, _____                                      __
                                                 (Signature)


                                   Notice
                                   ------

      The signatures to the foregoing Assignment and Certification must 
correspond exactly to the name of the registered owner hereof, as written 
upon the face of this Rights Certificate, without any change whatsoever.

- ----------------------------------------------------------------------------

                        FORM OF ELECTION TO PURCHASE
                        ----------------------------

(To be executed if holder desires to
exercise the Rights Certificate.)


To HEMAGEN DIAGNOSTICS, INC.:

      The undersigned hereby irrevocably elects to exercise 
_____________________ Rights represented by this Rights Certificate to 
purchase the Common Shares (or such other securities of the Company or of 
any other person) issuable upon the exercise of such Rights and requests 
that certificates for such shares be issued in the name of:

Please insert social security
or other identifying number: ________________

___                                                _________________________
                       (Please print name and address)
                                                ____________________________


      (If the above number of Rights is not all of the Rights evidenced by 
this Rights Certificate, then a new Rights Certificate for the balance 
remaining of such Rights will be registered and returned to the 
undersigned.)


Dated: _______________, _____                                      __
                                                 (Signature)

Medallion Signature Guaranty:

- ---------------------------------------------------------------------------


                           Election Certification
                           ----------------------

      The undersigned hereby certifies by checking the appropriate boxes 
that:

      (1)    The Rights evidenced by this Rights Certificate [  ] are [  ] 
are not being sold, assigned, and transferred by or on behalf of a Person 
who is or was an Acquiring Person or an Affiliate or Associate of any 
Acquiring Person (as such terms are defined pursuant to the Rate Agreement).

      (2)    After due inquiry and to the best knowledge of the undersigned, 
he, she, or it [  ] did [  ] did not acquire the Rights evidenced by this 
Rights Certificate from any person who is or was an Acquiring Person or an 
Affiliate or Associate of any Acquiring Person.



Dated: _______________, _____                                      __
                                                 (Signature)

- ----------------------------------------------------------------------------


                                   NOTICE
                                   ------

      The signatures in the foregoing Election to Purchase and Certification 
must correspond exactly to the name of the registered owner hereof, as 
written upon the face of this Rights Certificate, without any change 
whatsoever.

      In the event the certification set forth above in the Assignment or 
the Election to Purchase, as the case may be, is not completed, the Company 
and the Rights Agent will deem the beneficial owner of the Rights evidenced 
by this Rights Certificate to be an Acquiring Person or an Affiliate or 
Associate thereof (as defined in the Rights Agreement) and such Assignment 
or Election to Purchase will not be honored.


                                               Exhibit B to Rights Agreement


                        SUMMARY OF RIGHTS TO PURCHASE
                                COMMON SHARES


      On January 27, 1999, the Board of Directors of Hemagen Diagnostics, 
Inc. (the "Company") declared a dividend distribution of one common share 
purchase right (a "Right") for each outstanding share of common stock, par 
value $0.01 per share (the "Common Shares"), of the Company.  The dividend 
is payable on February 10, 1999 (the "Record Date") to the stockholders of 
record on that date.  Except as described below, each Right, when 
exercisable, entitles the registered holder to purchase from the Company one 
Common Share of the Company at a price of $4.00 per Common Share (the 
"Purchase Price"), subject to adjustment.  The description and terms of the 
Rights are set forth in a Rights Agreement (the "Rights Agreement") between 
the Company and Continental Stock Transfer and Trust Company ("Continental") 
as Rights Agent (the "Rights Agent").

      Initially, the Rights will be attached to all certificates 
representing Common Shares then outstanding, and no separate Rights 
certificates will be distributed.  Until the earlier to occur of (i) 10 
business days following a public announcement that a person or group of 
affiliated or associated persons (an "Acquiring Person") have acquired 
beneficial ownership of 15% or more of the outstanding Common Shares (the 
date of such an announcement being a "Shares Acquisition Date"), or (ii) 10 
business days (or such later date as may be determined by action of the 
Board of Directors prior to such time as any Person becomes an Acquiring 
Person) following the commencement of, or announcement of an intention to 
make, a tender offer or exchange offer the consummation of which would 
result in the beneficial ownership by a person or group of 15% or more of 
such outstanding Common Shares, the Rights will be evidenced, with respect 
to any of the Common Share certificates outstanding as of the Record Date, 
by such Common Share certificates together with a copy of this Summary of 
Rights.

      The Rights Agreement provides that, until the Distribution Date, the 
Rights will be transferred with and only with the Common Shares.  Until the 
Distribution Date (or earlier redemption or expiration of the Rights), new 
Common Share certificates issued after the Record Date upon transfer or new 
issuance of Common Shares will contain a notation incorporating the Rights 
Agreement by reference.  Until the Distribution Date (or earlier redemption 
or expiration of the Rights), the surrender for transfer of any certificates 
for Common Shares outstanding as of the Record Date, even without such 
notation or a copy of this Summary of Rights being attached thereto, will 
also constitute the transfer of the Rights associated with the Common Shares 
represented by such certificate.  As soon as practicable following the 
Distribution Date, separate certificates evidencing the Rights ("Rights 
Certificates") will be mailed to holders of record of the Common Shares as 
of the close of business on the Distribution Date, and the separate Rights 
Certificates alone will evidence the Rights.

      The Rights are not exercisable until the Distribution Date.  The 
Rights will expire on January 27, 2009 (the "Final Expiration Date"), unless 
the Rights are earlier redeemed by the Company, as described below.

      The Purchase Price payable, and the number of Common Shares or other 
securities or property issuable, upon exercise of the Rights are subject to 
adjustment from time to time to prevent dilution (i) in the event of a stock 
dividend on, or a subdivision, combination or reclassification of, the 
Common Shares, (ii) upon the grant to holders of the Common Shares of 
certain rights or warrants to subscribe for or purchase Common Shares at a 
price, or securities convertible into Common Shares with a conversion price, 
less than the then current market price of the Common Shares or (iii) upon 
the distribution to holders of the Common Shares of evidences of 
indebtedness or assets (excluding regular periodic cash dividends paid out 
of earnings or retained earnings or dividends payable in Common Shares) or 
of subscription rights or warrants (other than those referred to above).

      The number of outstanding Rights and the number of Common Shares 
issuable upon exercise of each Right are also subject to adjustment in the 
event of a stock split of the Common Shares or a stock dividend on the 
Common Shares payable in Common Shares or subdivisions, consolidations or 
combinations of the Common Shares occurring, in any such case, prior to the 
Distribution Date.

      Common Shares purchasable upon exercise of the Rights will not be 
redeemable.

      In the event that, after the first date of public announcement by the 
Company or an Acquiring Person that an Acquiring Person has become such, the 
Company is involved in a merger or other business combination transaction in 
which the Common Shares are exchanged or changed, or 50% or more of the 
Company's consolidated assets or earning power are sold (in one transaction 
or a series of transactions), proper provision will be made so that each 
holder of a Right (other than an Acquiring Person) will thereafter have the 
right to receive, upon the exercise thereof at the then current exercise 
price of the Right, that number of shares of common stock of the acquiring 
company (or, in the event there is more than one acquiring company, the 
acquiring company receiving the greatest portion of the assets or earning 
power transferred) which at the time of such transaction would have a market 
value of two times the exercise price of the Right.

      In the event that any person becomes an Acquiring Person, each holder 
of a Right will thereafter have the right to receive upon exercise that 
number of Common Shares having a market value of two times the exercise 
price of the Right.  Upon occurrence of any of the events described in the 
immediately preceding sentence, any Rights that are, or (under certain 
circumstances specified in the Rights Agreement) were, beneficially owned by 
any Acquiring Person shall immediately become null and void.

      At any time after the occurrence of any such event and prior to the 
acquisition by such person or group of 50% or more of the outstanding Common 
Shares, the Board of Directors may exchange the Rights (other than Rights 
owned by such person or group which have become void), in whole or in part, 
at an exchange ratio of one Common Share per Right (subject to adjustment).

      With certain exceptions, no adjustment in the Purchase Price will be 
required until cumulative adjustments require an adjustment of at least 1% 
in such Purchase Price.  No fractional Common Shares will be issued and in 
lieu thereof, an adjustment in cash will be made based on the market price 
of the Common Shares on the last trading day prior to the date of exercise.

      At any time prior to the earlier of (i) the tenth day after a Shares 
Acquisition Date, or (ii) the expiration of the Rights, the Board of 
Directors may redeem the Rights in whole, but not in part, at a price of 
$.001 per Right (the "Redemption Price"). The redemption of the Rights may 
be made effective at such time on such basis and with such conditions as the 
Board of Directors in its sole discretion may establish.  Immediately upon 
any redemption of the Rights, the right to exercise the Rights will 
terminate and the only right of the holders of Rights will be to receive the 
Redemption Price.

      Other than those provisions relating to the principal economic terms 
of the Rights, any of the provisions of the Rights Agreement may be amended 
by the Board of Directors of the Company prior to the Distribution Date.  
After the Distribution Date, the provisions of the Rights Agreement may be 
amended by the Board in order to cure any ambiguity, to make changes that do 
not adversely affect the interests of holders of Rights (excluding the 
interests of any Acquiring Person), or to shorten or lengthen any time 
period under the Rights Agreement; provided, however, that no amendment to 
adjust the time period governing redemption shall be made at such time as 
the Rights are not redeemable.

      Until a Right is exercised, the holder thereof, as such, will have no 
rights as a stockholder of the Company, including, without limitation, the 
right to vote or to receive dividends.

      A copy of the Rights Agreement has been filed with the Securities and 
Exchange Commission as an Exhibit to a Registration Statement on Form 8-A.  
A copy of the Rights Agreement is available free of charge from the Company.  
This summary description of the Rights does not purport to be complete and 
is qualified in its entirety by reference to the Rights Agreement, which is 
hereby incorporated herein by reference.






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