AGREEMENT TO FILE A JOINT STATEMENT

                                                                       EXHIBIT 1

                                AGREEMENT TO FILE
                                A JOINT STATEMENT

        By their signatures, the undersigned agree to file a joint Schedule 13D
and understand that such statement is filed by or on behalf of each of them.



Dated:  February 11, 1997                     /s/ Xxxxx X. Xxxxxxxxxx
                                            --------------------------------
                                            Xxxxx X. Xxxxxxxxxx

Dated:  February 11, 1997                     /s/ Xxxxxxx X. Xxxxxx
                                            (formerly Xxxxxxx X. Xxxxxxxxxx)
                                            --------------------------------
                                            Xxxxxxx X. Xxxxxx

Dated:  February 11, 1997                     /s/ Xxx X. Xxxxxxxxxx
                                            --------------------------------
                                            Xxx X. Xxxxxxxxxx

Dated:  February 11, 1997                     /s/ Xxxx X. Xxxxxxxxxx
                                            --------------------------------
                                            Xxxx X. Xxxxxxxxxx

Dated:  February 11, 1997                     /s/ Xxx X. Xxxxxxxxxx
                                            --------------------------------
                                            Xxx X. Xxxxxxxxxx


                                            ESCALON CORP.

Dated:  February 11, 1997                   By:  /s/ Xxxxx X. Xxxxxxxxxx
                                            --------------------------------
                                            Xxxxx X. Xxxxxxxxxx, President



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