HEMAGEN DIAGNOSTICS INC
SC 13D, 1999-06-28
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                  SCHEDULE 13D
                                 (Rule 13d-101)

    INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a)
             AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a)

                               (Amendment No. __)


                            Hemagen Diagnostics, Inc.
- --------------------------------------------------------------------------------
                                (Name of Issuer)



                                  Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                   423501 105
- --------------------------------------------------------------------------------
                                 (CUSIP Number)


                              Gary P. Kreider, Esq.
                           Keating, Muething & Klekamp
                       One East Fourth Street, 18th Floor
                             Cincinnati, Ohio 45202
                                 (513) 579-6411
- --------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                  June 21, 1999
- --------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


         If the filing person has  previously  filed a statement on Schedule 13G
to report the  acquisition  that is the  subject of this  Schedule  13D,  and is
filing this schedule because of Rule 13d-1(e),  13d-1(f) or 13d-1(g),  check the
following box [ ]

                       (Continued on the following pages)




<PAGE>

CUSIP No. 423501 105                   13D                    Page 2 of 18 Pages
- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          Jerry L. Ruyan
- --------------------------------------------------------------------------------
 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*           (a)  [X]
                                                                      (b)  [ ]
- --------------------------------------------------------------------------------
 3        SEC USE ONLY

- --------------------------------------------------------------------------------
 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------
 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT  [ ]
          TO ITEM 2(d) or 2(e)

- --------------------------------------------------------------------------------
 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States citizen
- --------------------------------------------------------------------------------
                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES              --------------------------------------------------
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      641,354 - See Item 5(I)(b)
         REPORTING            --------------------------------------------------
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     342,154 - See Item 5(I)(b)
                             ---------------------------------------------------
                             10      SHARED DISPOSITIVE POWER

                                     -0-
- --------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          641,354 - See Item 5(I)(a)
- --------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES             [ ]
          CERTAIN SHARES*

- --------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          7.6%
- --------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

             IN
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


CUSIP No. 423501 105                   13D                   Page 3 of 18 Pages
- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          William P. Hales
- --------------------------------------------------------------------------------
 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*           (a)  [X]
                                                                      (b)  [ ]
- --------------------------------------------------------------------------------
 3        SEC USE ONLY

- --------------------------------------------------------------------------------
 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------
 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT  [ ]
          TO ITEM 2(d) or 2(e)

- --------------------------------------------------------------------------------
 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States citizen
- --------------------------------------------------------------------------------
                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES              --------------------------------------------------
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      641,354 - See Item 5(II)(b)
         REPORTING            --------------------------------------------------
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     249,600 - See Item 5(II)(b)
                             ---------------------------------------------------
                             10      SHARED DISPOSITIVE POWER

                                     -0-
- --------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          641,354 - See Item 5(II)(a)
- --------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES             [ ]
          CERTAIN SHARES*

- --------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          7.6%
- --------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

             IN
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>


CUSIP No. 423501 105                   13D                    Page 4 of 18 Pages
- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          Thomas A. Donelan
- --------------------------------------------------------------------------------
 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*           (a)  [X]
                                                                      (b)  [ ]

- --------------------------------------------------------------------------------
 3        SEC USE ONLY


- --------------------------------------------------------------------------------
 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------
 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT  [ ]
          TO ITEM 2(d) or 2(e)

- --------------------------------------------------------------------------------
 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States citizen
- --------------------------------------------------------------------------------
                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES              --------------------------------------------------
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      641,354 - See Item 5(III)(b)
         REPORTING            --------------------------------------------------
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     18,100
                             ---------------------------------------------------
                             10      SHARED DISPOSITIVE POWER

                                     -0-
- --------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          641,354 - See Item 5(III)(a)
- --------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES             [ ]
          CERTAIN SHARES*

- --------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          7.6%
- --------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

             IN
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>


CUSIP No. 423501 105                   13D                    Page 5 of 18 Pages
- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          Christopher P. Hendy
- --------------------------------------------------------------------------------
 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*           (a)  [X]
                                                                      (b)  [ ]
- --------------------------------------------------------------------------------
 3        SEC USE ONLY

- --------------------------------------------------------------------------------
 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------
 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT  [ ]
          TO ITEM 2(d) or 2(e)

- --------------------------------------------------------------------------------
 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States citizen
- --------------------------------------------------------------------------------
                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES              --------------------------------------------------
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      641,354 - See Item 5(IV)(b)
         REPORTING            --------------------------------------------------
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     31,500
                             ---------------------------------------------------
                             10      SHARED DISPOSITIVE POWER

                                     -0-
- --------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          641,354 - See Item 5(IV)(a)
- --------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES             [ ]
          CERTAIN SHARES*

- --------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          7.6%
- --------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

             IN
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>

Item 1.  Security and Issuer.

     This  Schedule  13D relates to the common stock (the  "Common  Stock"),  of
Hemagen Diagnostics, Inc., a Delaware corporation. Hemagen's principal executive
offices are located at 34-40 Bear Hill Road, Waltham, Massachusetts, 02451.

Item 2.  Identity and Background.

          Jerry L. Ruyan

          (a)  Jerry L. Ruyan

          (b)  9468 Montgomery Road, Cincinnati, Ohio 45242

          (c)  Mr.  Ruyan is  primarily  engaged in the business of investing in
               businesses which he believes will improve with better management.
               He conducts his investment  activities from the address listed in
               (b) above.

          (d)  Mr. Ruyan, during the last five (5) years, has not been convicted
               in a criminal proceeding (excluding traffic violations or similar
               misdemeanors).

          (e)  Mr. Ruyan,  during the last five (5) years,  has not been a party
               to a civil  proceeding  of a judicial or  administrative  body of
               competent  jurisdiction  which resulted in Mr. Ruyan being at any
               time  subject  to a  judgment,  decree or final  order  enjoining
               future  violations  of, or  prohibiting  or mandating  activities
               subject  to,  federal or state  securities  laws or  finding  any
               violation with respect to such laws.

          (f)  United States citizen.

          William P. Hales

          (a)  William P. Hales.

          (b)  408 West 57th Street, 4A, New York, New York 10019.

          (c)  Senior   Investment   Advisor  with  Jesup  &  Lamont  Securities
               corporation,  650 Fifth  Avenue,  3rd Floor,  New York,  New York
               10019.

          (d)  Mr. Hales, during the last five (5) years, has not been convicted
               in a criminal proceeding (excluding traffic violations or similar
               misdemeanors).

          (e)  Mr. Hales,  during the last five (5) years,  has not been a party
               to a civil  proceeding  of a judicial or  administrative  body of
               competent  jurisdiction  which resulted in Mr. Hales being at any
               time  subject  to a  judgment,  decree or final  order  enjoining
               future  violations  of, or  prohibiting  or mandating  activities
               subject  to,  federal or state  securities  laws or  finding  any
               violation with respect to such laws.

<PAGE>


          (f)  United States citizen.

          Thomas A. Donelan

          (a)  Thomas A. Donelan.

          (b)  9468 Montgomery Road, Cincinnati, Ohio 45242

          (c)  Redwood Venture Group,  9468 Montgomery  Road,  Cincinnati,  Ohio
               45242

          (d)  Mr.  Donelan,  during  the  last  five  (5)  years,  has not been
               convicted in a criminal proceeding  (excluding traffic violations
               or similar misdemeanors).

          (e)  Mr. Donelan, during the last five (5) years, has not been a party
               to a civil  proceeding  of a judicial or  administrative  body of
               competent jurisdiction which resulted in Mr. Donelan being at any
               time  subject  to a  judgment,  decree or final  order  enjoining
               future  violations  of, or  prohibiting  or mandating  activities
               subject  to,  federal or state  securities  laws or  finding  any
               violation with respect to such laws.

          (f)  United States citizen.

          Christopher P. Hendy

          (a)  Christopher P. Hendy.

          (b)  9468 Montgomery Road, Cincinnati, Ohio 45242

          (c)  Redwood Venture Group,  9468 Montgomery  Road,  Cincinnati,  Ohio
               45242

          (d)  Mr. Hendy, during the last five (5) years, has not been convicted
               in a criminal proceeding (excluding traffic violations or similar
               misdemeanors).

          (e)  Mr. Hendy,  during the last five (5) years,  has not been a party
               to a civil  proceeding  of a judicial or  administrative  body of
               competent  jurisdiction  which resulted in Mr. Hendy being at any
               time  subject  to a  judgment,  decree or final  order  enjoining
               future  violations  of, or  prohibiting  or mandating  activities
               subject  to,  federal or state  securities  laws or  finding  any
               violation with respect to such laws.

          (f)  United States citizen.


<PAGE>


Item 3.  Source and Amount of Funds or Other Consideration.

     Messrs.  Ruyan, Hales, Donelan and Hendy have utilized their personal funds
in connection with acquisitions to date of the Common Stock.

Item 4.  Purpose of Transaction.

     Messrs.  Ruyan, Hales,  Donelan and Hendy intend to replace four of the six
directors  with their  nominees.  To that end,  they intend to conduct a consent
solicitation  under Delaware law for the removal of current  directors and their
replacement  with  Messrs.  Ruyan,  Hales,  Donelan,  Hendy,  Dr.  Ricardo M. de
Oliveira  and Dr. Alan S. Cohen.  Dr. de Oliveira  and Dr.  Cohen are  currently
directors of the Company, but in order to effect this change and to provide that
all directors serve one year terms,  Delaware law requires that the entire Board
be removed  and  replaced.  The  consent  solicitation  is being  filed with the
Securities and Exchange Commission concurrently with this Schedule 13D.

     Messrs.  Ruyan,  Hales,  Donelan and Hendy are also seeking,  with the same
consent solicitation, approval of the following:


     -    Amend  the  Company's  Bylaws to  eliminate  the  classified  Board of
          Directors of Hemagen;

     -    Amend the Company's Bylaws to provide that Hemagen's  stockholders may
          fill vacancies on the Board of Directors of Hemagen;

     -    Repeal any Bylaws  adopted by the Board of Directors of Hemagen  since
          February 4, 1993, the date on which Hemagen last filed Bylaws with the
          Securities and Exchange Commission; and

     -    Approve   the  grant  of  options  to   purchase  up  to  15%  of  the
          fully-diluted  Common Stock to Mr. Hale and Redwood  Holdings  Inc., a
          corporation wholly-owned by Messrs. Ruyan, Donelan and Hendy.

     The  delivery  of consents by Messrs.  Ruyan,  Hales,  Donelan and Hendy to
Hemagen is  conditioned  on the receipt of  approval of all of their  proposals.
Consequently,  if all of the proposals  are not approved even though  sufficient
consents may have been  received to approve a particular  proposal,  none of the
proposals  will be enacted.  Should this  consent  solicitation  be  successful,
Messrs.  Ruyan, Hales, Donelan and Hendy expect that the Board of Directors will
change the executive management of Hemagen.

     Messrs.  Ruyan,  Hales,  Donelan  and  Hendy  may also  acquire  additional
securities of Hemagen from  time-to-time.  They will monitor their investment in
Hemagen and, in the future, may make additional  acquisitions or dispositions of
that stock.

     Except as set forth above,  they do not have any plans or  proposals  which
relate to or would result in:


<PAGE>

     4.1  The acquisition by any person of additional  securities of the issuer,
          or the disposition of securities of the issuer;

     4.2  An   extraordinary   corporation   transaction,   such  as  a  merger,
          reorganization  or  liquidation,  involving  the  issuer or any of its
          subsidiaries;

     4.3  A sale or transfer of a material  amount of assets of the issuer or of
          any of its subsidiaries;

     4.4  Any change in the present  board of  directors  or  management  of the
          issuer,  including any plans or proposals to change the number or term
          of directors or to fill any existing vacancies on the board;

     4.5  Any material change in the present  capitalization  or dividend policy
          of the issuer;

     4.6  Any  other  material  change in the  issuer's  business  or  corporate
          structure;

     4.7  Changes in the issuer's charter,  bylaws or instruments  corresponding
          thereto or other actions which may impede the  acquisition  of control
          of the issuer by any person;

     4.8  Causing a class of  securities  of the  issuer to be  delisted  from a
          national securities exchange or to cease to be authorized to be quoted
          in  an  inter-dealer   quotation  system  of  a  registered   national
          securities association;

     4.9  A class of equity  securities  of the  issuer  becoming  eligible  for
          termination of registration  pursuant to Section  12(g)(4) of the Act;
          or

     4.10 Any action similar to any of those enumerated above.

Item 5.  Interest in Securities of Issuer.

     I.   Jerry L. Ruyan

          (a)  See page 2, nos. 11 and 13. No. 11 includes  122,227  warrants to
               purchase Common Stock, all of which are currently exercisable.

          (b)  See  page 2,  nos.  7-10.  No. 8  includes  122,227  warrants  to
               purchase Common Stock. No. 9 includes 72,727 warrants to purchase
               Common Stock. All such warrants are currently exercisable.

          (c)  All of the following trades were made through market transactions
               in the last 60 days:

                          Purchase
                 Date      or Sale      Number of Shares         Price Per Share
                 ----      -------      ----------------         ---------------
               6/17/99    Purchase              400                    1.06
               6/17/99    Purchase              500                    1.06
               6/17/99    Purchase            2,000                    1.06

<PAGE>


          (d)  None.

          (e)  Not Applicable.

     II.  William P. Hales

          (a)  See page 3, nos. 11 and 13. No. 11 includes  122,227  warrants to
               purchase Common Stock, all of which are currently exercisable.

          (b)  See  page 3,  nos.  7-10.  No. 8  includes  122,227  warrants  to
               purchase Common Stock. No. 9 includes 49,500 Warrants to purchase
               Common Stock. All such warrants are currently exercisable.

          (c)  Mr.  Hales  purchased  49,500  of  Company  warrants  in a market
               transaction  on June  25,  1999 at  $0.19.  All of the  following
               trades in the Common Stock were made through market  transactions
               in the last 60 days:


                          Purchase
                 Date      or Sale      Number of Shares         Price Per Share
                 ----      -------      ----------------         ---------------

               5/28/99    Purchase             5,000                   .88
               6/4/99     Purchase             2,600                  1.30
               6/11/99    Purchase            25,000                  1.13
               6/14/99    Purchase             2,000                  1.19
               6/14/99    Purchase            40,000                  1.06
               6/15/99    Purchase            35,000                  1.03
               6/17/99    Purchase            25,100                  1.17
               6/18/99    Purchase            25,000                  1.06
               6/21/99    Purchase            10,000                  1.25
               6/24/99    Purchase             5,000                  1.19
               6/24/99    Purchase             2,000                  1.25
               6/24/99    Purchase             3,000                  1.09
               6/25/99    Purchase             1,000                  1.19

          (d)  None.

          (e)  Not Applicable.

     III. Thomas A. Donelan

          (a)  See page 4, nos. 11 and 13. No. 11 includes  122,227  warrants to
               purchase Common Stock, all of which are currently exercisable.

          (b)  See  page 4,  nos.  7-10.  No. 8  includes  122,227  warrants  to
               purchase Common Stock, all of which are currently exercisable.

<PAGE>


          (c)  All of the following trades were made through market transactions
               in the last 60 days:


                          Purchase
                 Date      or Sale      Number of Shares         Price Per Share
                 ----      -------      ----------------         ---------------

               6/14/99    Purchase             100                     $1.03
               6/22/99    Purchase          18,000                      1.38

          (d)  None.

          (e)  Not Applicable.

     IV.  Christopher P. Hendy

          (a)  See page 5, nos. 11 and 13. No. 11 includes  122,227  warrants to
               purchase Common Stock, all of which are currently exercisable.

          (b)  See  page 5,  nos.  7-10.  No. 8  includes  122,227  warrants  to
               purchase Common Stock, all of which are currently exercisable.

          (c)  All of the following trades were made through market transactions
               in the last 60 days:

                          Purchase
                 Date      or Sale      Number of Shares         Price Per Share
                 ----      -------      ----------------         ---------------

                6/8/99     Purchase             5,000                  $1.00
                6/11/99    Purchase             4,900                   1.06
                6/11/99    Purchase               100                   1.03
                6/14/99    Purchase             8,500                   1.06
                6/15/99    Purchase             1,000                   1.06
                6/16/99    Purchase             2,000                   1.06
                6/18/99    Purchase             3,500                   1.06
                6/25/99    Purchase             6,500                   0.94

          (d)  None.

          (e)  Not Applicable.

     V.   Messrs. Ruyan, Hales, Donelan and Hendy

          (a)  641,354  shares or 7.6%.  Includes  122,227  warrants to purchase
               Common Stock, all of which are currently exercisable.

          (b)  See pages 2 -5,  nos.  7-10.  Items 8 and 11 include  warrants to
               purchase  122,227  shares  of  Common  Stock,  all of  which  are
               currently exercisable.

          (c)  See (I)(c), (II)(c), III(c) and IV(c) above.

          (d)  None.

          (e)  Not Applicable.


<PAGE>

Item 6.    Contracts, Arrangements, Understandings or Relationships with respect
           to Securities of the Issuer.

     Messrs.  Ruyan, Hales, Donelan and Hendy have agreed to act in concert with
respect to their objectives as to Hemagen and to share expenses  involved in the
consent  solicitation  referred  to  previously  and such  other  matters as are
contained in Exhibit 2.

Item 7.    Material to be filed as Exhibits.

     1.   Powers of  Attorney  executed in  connection  with  filings  under the
          Securities Exchange Act of 1934

     2.   Agreement  required  pursuant to  Regulation  Section  240.13d-1(f)(1)
          promulgated under the Securities Exchange Act of 1934.



Dated: June 25, 1999                 *
                                       -----------------------------------------
                                                   Jerry L. Ruyan



                                     *
                                      ------------------------------------------
                                                   William P. Hales



                                     *
                                      ------------------------------------------
                                                   Thomas A. Donelan



                                      *
                                       -----------------------------------------
                                                   Christopher P. Hendy




                                     *By:   /s/Mark A. Weiss
                                         ---------------------------------------
                                                   Mark A. Weiss
                                                   Attorney-in-Fact


<PAGE>


                                    EXHIBIT 1

                                POWER OF ATTORNEY


     I, JERRY L. RUYAN,  hereby  appoint GARY P.  KREIDER and MARK A. WEISS,  or
either  of them,  as my true and  lawful  attorney-in-fact  to sign on my behalf
individually  and to file  with  the  Securities  and  Exchange  Commission  any
schedules or other filings or amendments  thereto made by me pursuant to Section
13(d) of the Securities and Exchange Act of 1934.

     IN  WITNESS  WHEREOF,  I have  hereunto  set my hand this 25th day of June,
1999.



                                            /s/Jerry L. Ruyan
                                            ------------------------------------
                                            JERRY L. RUYAN


<PAGE>

                                    EXHIBIT 1

                                POWER OF ATTORNEY


     I, THOMAS A. DONELAN,  hereby appoint GARY P. KREIDER and MARK A. WEISS, or
either  of them,  as my true and  lawful  attorney-in-fact  to sign on my behalf
individually  and to file  with  the  Securities  and  Exchange  Commission  any
schedules or other filings or amendments  thereto made by me pursuant to Section
13(d) of the Securities and Exchange Act of 1934.

     IN  WITNESS  WHEREOF,  I have  hereunto  set my hand this 25th day of June,
1999.



                                              /s/Thomas A. Donelan
                                              ----------------------------------
                                              THOMAS A. DONELAN






<PAGE>


                                   EXHIBIT 1

                                POWER OF ATTORNEY


     I, WILLIAM P. HALES,  do hereby  appoint GARY P. KREIDER and MARK A. WEISS,
or either of them, as my true and lawful  attorney-in-fact  to sign on my behalf
individually  and to file  with  the  Securities  and  Exchange  Commission  any
schedules or other filings or amendments  thereto made by me pursuant to Section
13(d) of the Securities and Exchange Act of 1934.

     IN  WITNESS  WHEREOF,  I have  hereunto  set my hand this 25th day of June,
1999.



                                             /s/William P. Hales
                                             -----------------------------------
                                             WILLIAM P. HALES


<PAGE>



                                    EXHIBIT 1

                                POWER OF ATTORNEY


     I,  CHRISTOPHER  P. HENDY,  do hereby  appoint  GARY P. KREIDER and MARK A.
WEISS, or either of them, as my true and lawful  attorney-in-fact  to sign on my
behalf  individually and to file with the Securities and Exchange Commission any
schedules or other filings or amendments  thereto made by me pursuant to Section
13(d) of the Securities and Exchange Act of 1934.

     IN  WITNESS  WHEREOF,  I have  hereunto  set my hand this 25th day of June,
1999.



                                              /s/Christopher P. Hendy
                                             -----------------------------------
                                             CHRISTOPHER P. HENDY


<PAGE>



                                    EXHIBIT 2



                                    AGREEMENT


     This Agreement ("Agreement") executed this 25th day of June, 1999 is by and
among MR.  WILLIAM P. HALES,  MR. JERRY L. RUYAN,  MR. THOMAS A. DONELAN and MR.
CHRISTOPHER P. HENDY (collectively, the "Shareholders").

     WHEREAS,   as  of  the  date  of  this  Agreement,   the  Shareholders  own
approximately  7.6%  of the  common  stock  (the  "Common  Stock"),  of  Hemagen
Diagnostics, Inc., a Delaware corporation;

     WHEREAS,  the Shareholders may be deemed to be the beneficial owners of the
Common Stock  pursuant to Regulation  Section  240.13d-3  promulgated  under the
Securities Exchange Act of 1934;

     WHEREAS,  the Shareholders from time to time must file statements  pursuant
to certain  sections of the  Securities  Exchange Act of 1934  concerning  their
ownership of Common Stock; and

     WHEREAS,  the Shareholders desire to provide for the allocation of expenses
in  connection  with  the  proposed  consent   solicitation   regarding  Hemagen
Diagnostics, Inc.

     NOW, THEREFORE, in consideration of the premises the Shareholders agree:

     1.  That  the  Shareholders  do  hereby  agree  to file  jointly  with  the
Securities  Exchange  Commission  any  schedules or other  filings or amendments
thereto made by or on behalf of the  Shareholders  pursuant to Section  13(d) of
the Securities Exchange Act of 1934.

     2. That all costs,  fees,  expenses and  liabilities of whatever  nature be
allocated  and paid 50% by Hales  and 50% by  Redwood  Holdings,  Inc.  The sole
shareholder of Redwood  Holdings Inc. is an employee stock  ownership plan whose
principal participants are Ruyan, Donelan and Hendy.

     3. That Ruyan shall, in consultation with Hales, have the authority to make
all decisions  regarding the matters which are the subject of their ownership of
the shares of Hemagen Diagnostics, Inc. covered by a Schedule 13D filed with the
Securities  and Exchange  Commission  and with  respect to the proposed  consent
solicitation referred to in the Schedule 13D.

     4. This  Agreement  shall be governed in accordance  with the laws of Ohio,
may be amended  only in writing and may be  terminated  by either party upon ten
days written notice. In the event of termination, each party shall remain liable
for his or her shares of the expenses  incurred to the date of  termination  and
shall  promptly  pay their share of expenses,  upon  receipt of invoice,  to the
remaining party.



<PAGE>




     IN WITNESS  WHEREOF,  the parties have executed this  Agreement on the date
set forth above.

                                               /s/William P. Hales
                                              ----------------------------------
                                                     William P. Hales

                                               /s/Jerry L. Ruyan
                                              ----------------------------------
                                                     Jerry L. Ruyan

                                               /s/Thomas A. Donelan
                                              ----------------------------------
                                                     Thomas A. Donelan

                                              /s/Christopher P. Hendy
                                              ----------------------------------
                                                     Christopher P. Hendy


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