The results in the group in which there was interagglutination differ in no striking way from those obtained in the group in which there was no interagglutination. It may be concluded, therefore, that the presence of isoagglutinins is of no importance for the final results of the homoplastic transplantation of arteries. From the conflicting evidence of the survival of muscular fibers in one case and their disappearance in many other cases, it may be concluded further that between animals of the same species there are unknown biological differences that prevent, in most instances, the survival of homoplastic transplanted arteries, although a survival does occur in some cases.

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