1
                                                                      EXHIBIT 24
                                      
                              POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENT, that each of the undersigned hereby
constitutes and appoints Harris J. Ashton, Robert M. Lovejoy, Jr., James R.
Simpson, and John R. Ficarro and each of them (with full power to each of them
to act alone), his true and lawful attorney-in-fact and agent, for him and on
his behalf and in his name, place and stead, to sign, execute and affix his
name thereto and file any documents that he is required or permitted to sign
relating to the proposed registration under the Securities Act of 1933, as
amended, of Common Stock (and associated Common Stock Purchase Rights) of the
Corporation, including, but not limited to, the appropriate form of
registration statement, any amendment or amendments thereto, including an
amendment or amendments increasing the amount of securities sought to be
registered, with all exhibits and any and all documents and supplementary
information required to be filed with respect thereto with the Securities and
Exchange Commission and any other appropriate authority, granting unto said
attorneys and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the
premises in order to effectuate the same as fully to all intents and purposes
as he himself might or could do if personally present, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them may
lawfully do or cause to be done by virtue hereof.

        The Power of Attorney may be signed in counterparts.

        IN WITNESS WHEREOF, each of the undersigned has hereunto set his hand
this 30th of December, 1994.


 Harris J. Ashton           
 -------------------------------               -------------------------------
 Harris J. Ashton                              Philip B. Harley
                                      
                                                                              
 -------------------------------               -------------------------------
 James R. Simpson                              Richard W. Haskel
                                      

 -------------------------------               -------------------------------
 C. Whitcomb Alden, Jr.                        Edward H. Hoornstra
                                      

 -------------------------------               -------------------------------
 Christopher A. Forster                        Charles B. Johnson
                                      

 -------------------------------               -------------------------------
 S. Joseph Fortunato                           Kelly E. Ashton Sant Albano
                                      

   2

                                      
                              POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENT, that each of the undersigned hereby
constitutes and appoints Harris J. Ashton, Robert M. Lovejoy, Jr., James R.
Simpson, and John R. Ficarro and each of them (with full power to each of them
to act alone), his true and lawful attorney-in-fact and agent, for him and on
his behalf and in his name, place and stead, to sign, execute and affix his
name thereto and file any documents that he is required or permitted to sign
relating to the proposed registration under the Securities Act of 1933, as
amended, of Common Stock (and associated Common Stock Purchase Rights) of the
Corporation, including, but not limited to, the appropriate form of
registration statement, any amendment or amendments thereto, including an
amendment or amendments increasing the amount of securities sought to be
registered, with all exhibits and any and all documents and supplementary
information required to be filed with respect thereto with the Securities and
Exchange Commission and any other appropriate authority, granting unto said
attorneys and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the
premises in order to effectuate the same as fully to all intents and purposes
as he himself might or could do if personally present, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them may
lawfully do or cause to be done by virtue hereof.

        The Power of Attorney may be signed in counterparts.

        IN WITNESS WHEREOF, each of the undersigned has hereunto set his hand
this 30th of December, 1994.


                                                                              
 -------------------------------               -------------------------------
 Harris J. Ashton                              Philip B. Harley
                                      
                                                                              
 -------------------------------               -------------------------------
 James R. Simpson                              Richard W. Haskel
                                      
 C. Whitcomb Alden, Jr.
 -------------------------------               -------------------------------
 C. Whitcomb Alden, Jr.                        Edward H. Hoornstra
                                      

 -------------------------------               -------------------------------
 Christopher A. Forster                        Charles B. Johnson
                                      

 -------------------------------               -------------------------------
 S. Joseph Fortunato                           Kelly E. Ashton Sant Albano
                                      

   3

                                      
                              POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENT, that each of the undersigned hereby
constitutes and appoints Harris J. Ashton, Robert M. Lovejoy, Jr., James R.
Simpson, and John R. Ficarro and each of them (with full power to each of them
to act alone), his true and lawful attorney-in-fact and agent, for him and on
his behalf and in his name, place and stead, to sign, execute and affix his
name thereto and file any documents that he is required or permitted to sign
relating to the proposed registration under the Securities Act of 1933, as
amended, of Common Stock (and associated Common Stock Purchase Rights) of the
Corporation, including, but not limited to, the appropriate form of
registration statement, any amendment or amendments thereto, including an
amendment or amendments increasing the amount of securities sought to be
registered, with all exhibits and any and all documents and supplementary
information required to be filed with respect thereto with the Securities and
Exchange Commission and any other appropriate authority, granting unto said
attorneys and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the
premises in order to effectuate the same as fully to all intents and purposes
as he himself might or could do if personally present, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them may
lawfully do or cause to be done by virtue hereof.

        The Power of Attorney may be signed in counterparts.

        IN WITNESS WHEREOF, each of the undersigned has hereunto set his hand
this 30th of December, 1994.


                                                                              
 -------------------------------               -------------------------------
 Harris J. Ashton                              Philip B. Harley
                                      
                                                                              
 -------------------------------               -------------------------------
 James R. Simpson                              Richard W. Haskel
                                      

 -------------------------------               -------------------------------
 C. Whitcomb Alden, Jr.                        Edward H. Hoornstra
                                      
 Christopher A. Forster
 -------------------------------               -------------------------------
 Christopher A. Forster                        Charles B. Johnson
                                      

 -------------------------------               -------------------------------
 S. Joseph Fortunato                           Kelly E. Ashton Sant Albano
                                      

   4

                                      
                              POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENT, that each of the undersigned hereby
constitutes and appoints Harris J. Ashton, Robert M.  Lovejoy, Jr., James R.
Simpson, and John R. Ficarro and each of them (with full power to each of them
to act alone), his true and lawful attorney-in-fact and agent, for him and on
his behalf and in his name, place and stead, to sign, execute and affix his
name thereto and file any documents that he is required or permitted to sign
relating to the proposed registration under the Securities Act of 1933, as
amended, of Common Stock (and associated Common Stock Purchase Rights) of the
Corporation, including, but not limited to, the appropriate form of
registration statement, any amendment or amendments thereto, including an
amendment or amendments increasing the amount of securities sought to be
registered, with all exhibits and any and all documents and supplementary
information required to be filed with respect thereto with the Securities and
Exchange Commission and any other appropriate authority, granting unto said
attorneys and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the
premises in order to effectuate the same as fully to all intents and purposes
as he himself might or could do if personally present, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them may
lawfully do or cause to be done by virtue hereof.

        The Power of Attorney may be signed in counterparts.

        IN WITNESS WHEREOF, each of the undersigned has hereunto set his hand
this 30th of December, 1994.


                                                                              
 -------------------------------               -------------------------------
 Harris J. Ashton                              Philip B. Harley
                                      
                                                                              
 -------------------------------               -------------------------------
 James R. Simpson                              Richard W. Haskel
                                      

 -------------------------------               -------------------------------
 C. Whitcomb Alden, Jr.                        Edward H. Hoornstra
                                      

 -------------------------------               -------------------------------
 Christopher A. Forster                        Charles B. Johnson
                                      
 S. Joseph Fortunato
 -------------------------------               -------------------------------
 S. Joseph Fortunato                           Kelly E. Ashton Sant Albano

   5

                                      
                                      
                              POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENT, that each of the undersigned hereby
constitutes and appoints Harris J. Ashton, Robert M. Lovejoy, Jr., James R.
Simpson, and John R. Ficarro and each of them (with full power to each of them
to act alone), his true and lawful attorney-in-fact and agent, for him and on
his behalf and in his name, place and stead, to sign, execute and affix his
name thereto and file any documents that he is required or permitted to sign
relating to the proposed registration under the Securities Act of 1933, as
amended, of Common Stock (and associated Common Stock Purchase Rights) of the
Corporation, including, but not limited to, the appropriate form of
registration statement, any amendment or amendments thereto, including an
amendment or amendments increasing the amount of securities sought to be
registered, with all exhibits and any and all documents and supplementary
information required to be filed with respect thereto with the Securities and
Exchange Commission and any other appropriate authority, granting unto said
attorneys and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the
premises in order to effectuate the same as fully to all intents and purposes
as he himself might or could do if personally present, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them may
lawfully do or cause to be done by virtue hereof.

        The Power of Attorney may be signed in counterparts.

        IN WITNESS WHEREOF, each of the undersigned has hereunto set his hand
this 30th of December, 1994.


                                               Philip B. Harley   
 -------------------------------               -------------------------------
 Harris J. Ashton                              Philip B. Harley
                                      
                                                                              
 -------------------------------               -------------------------------
 James R. Simpson                              Richard W. Haskel
                                      

 -------------------------------               -------------------------------
 C. Whitcomb Alden, Jr.                        Edward H. Hoornstra
                                      

 -------------------------------               -------------------------------
 Christopher A. Forster                        Charles B. Johnson
                                      

 -------------------------------               -------------------------------
 S. Joseph Fortunato                           Kelly E. Ashton Sant Albano
                                      
                                      

   6

                              POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENT, that each of the undersigned hereby
constitutes and appoints Harris J. Ashton, Robert M.  Lovejoy, Jr., James R.
Simpson, and John R. Ficarro and each of them (with full power to each of them
to act alone), his true and lawful attorney-in-fact and agent, for him and on
his behalf and in his name, place and stead, to sign, execute and affix his
name thereto and file any documents that he is required or permitted to sign
relating to the proposed registration under the Securities Act of 1933, as
amended, of Common Stock (and associated Common Stock Purchase Rights) of the
Corporation, including, but not limited to, the appropriate form of
registration statement, any amendment or amendments thereto, including an
amendment or amendments increasing the amount of securities sought to be
registered, with all exhibits and any and all documents and supplementary
information required to be filed with respect thereto with the Securities and
Exchange Commission and any other appropriate authority, granting unto said
attorneys and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the
premises in order to effectuate the same as fully to all intents and purposes
as he himself might or could do if personally present, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them may
lawfully do or cause to be done by virtue hereof.

        The Power of Attorney may be signed in counterparts.

        IN WITNESS WHEREOF, each of the undersigned has hereunto set his hand
this 31st of December, 1994.


                                                                              
 -------------------------------               -------------------------------
 Harris J. Ashton                              Philip B. Harley
                                      
                                               Richard W. Haskel 
 -------------------------------               -------------------------------
 James R. Simpson                              Richard W. Haskel
                                      

 -------------------------------               -------------------------------
 C. Whitcomb Alden, Jr.                        Edward H. Hoornstra
                                      

 -------------------------------               -------------------------------
 Christopher A. Forster                        Charles B. Johnson
                                      

 -------------------------------               -------------------------------
 S. Joseph Fortunato                           Kelly E. Ashton Sant Albano
                                      

   7

                                      
                              POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENT, that each of the undersigned hereby
constitutes and appoints Harris J. Ashton, Robert M. Lovejoy, Jr., James R.
Simpson, and John R. Ficarro and each of them (with full power to each of them
to act alone), his true and lawful attorney-in-fact and agent, for him and on
his behalf and in his name, place and stead, to sign, execute and affix his
name thereto and file any documents that he is required or permitted to sign
relating to the proposed registration under the Securities Act of 1933, as
amended, of Common Stock (and associated Common Stock Purchase Rights) of the
Corporation, including, but not limited to, the appropriate form of
registration statement, any amendment or amendments thereto, including an
amendment or amendments increasing the amount of securities sought to be
registered, with all exhibits and any and all documents and supplementary
information required to be filed with respect thereto with the Securities and
Exchange Commission and any other appropriate authority, granting unto said
attorneys and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the
premises in order to effectuate the same as fully to all intents and purposes
as he himself might or could do if personally present, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them may
lawfully do or cause to be done by virtue hereof.

        The Power of Attorney may be signed in counterparts.

        IN WITNESS WHEREOF, each of the undersigned has hereunto set his hand
this 30th of December, 1994.


                                                                              
 -------------------------------               -------------------------------
 Harris J. Ashton                              Philip B. Harley
                                      
                                                                              
 -------------------------------               -------------------------------
 James R. Simpson                              Richard W. Haskel
                                      

 -------------------------------               -------------------------------
 C. Whitcomb Alden, Jr.                        Edward H. Hoornstra
                                      
                                               Charles B. Johnson
 -------------------------------               -------------------------------
 Christopher A. Forster                        Charles B. Johnson
                                      

 -------------------------------               -------------------------------
 S. Joseph Fortunato                           Kelly E. Ashton Sant Albano
                                      

   8

                                      
                              POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENT, that each of the undersigned hereby
constitutes and appoints Harris J. Ashton, Robert M. Lovejoy, Jr., James R.
Simpson, and John R. Ficarro and each of them (with full power to each of them
to act alone), his true and lawful attorney-in-fact and agent, for him and on
his behalf and in his name, place and stead, to sign, execute and affix his
name thereto and file any documents that he is required or permitted to sign
relating to the proposed registration under the Securities Act of 1933, as
amended, of Common Stock (and associated Common Stock Purchase Rights) of the
Corporation, including, but not limited to, the appropriate form of
registration statement, any amendment or amendments thereto, including an
amendment or amendments increasing the amount of securities sought to be
registered, with all exhibits and any and all documents and supplementary
information required to be filed with respect thereto with the Securities and
Exchange Commission and any other appropriate authority, granting unto said
attorneys and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the
premises in order to effectuate the same as fully to all intents and purposes
as he himself might or could do if personally present, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them may
lawfully do or cause to be done by virtue hereof.

        The Power of Attorney may be signed in counterparts.

        IN WITNESS WHEREOF, each of the undersigned has hereunto set his hand
this 31st of December, 1994.


                                                                              
 -------------------------------               -------------------------------
 Harris J. Ashton                              Philip B. Harley
                                      
                                                                              
 -------------------------------               -------------------------------
 James R. Simpson                              Richard W. Haskel
                                      

 -------------------------------               -------------------------------
 C. Whitcomb Alden, Jr.                        Edward H. Hoornstra
                                      

 -------------------------------               -------------------------------
 Christopher A. Forster                        Charles B. Johnson
                                      
                                               Kelly E. Ashton Sant Albano
 -------------------------------               -------------------------------
 S. Joseph Fortunato                           Kelly E. Ashton Sant Albano