The importance of the precipitin test in determining biologic relationships has been clearly set forth in Nuttall's fine monograph on the subject, and it must be admitted that the facts there instanced certainly tended to diminish the value of the test from a medicolegal standpoint. The relationship between man and the ape, for example, is shown by the fact that the serum of a rabbit inoculated with human blood gives a precipitate not only with human blood, but also, though in less degree, with the blood of the ape. The precipitation of an immune serum by the blood of allied species as well as by the specific blood used for inoculation is a circumstance that naturally prevents the formulation of any such dogmatic statement as seems required by the exigencies of the law. Uhlenhuth's1 discovery, however, seems to remove this difficulty. The inoculation of rabbits with the blood of
THE PRECIPITIN TEST FOR HUMAN BLOOD.. JAMA. 1905;XLV(26):1960. doi:10.1001/jama.1905.02510260046011
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