Abstract
DETERMINATION OF THE BLOOD GROUPS OF DRIED BLOOD STAINSThe antigens A and B, which determine the classic blood groups, are relatively stable substances. Therefore, it is possible to determine their presence in dried blood stains and thus indirectly to determine the group of blood that produced the stain. The principle of this technic is as follows:One allows a mixture of anti-A and anti-B reagent to react with the stain. The quantities of agglutinins in the reagent are carefully adjusted so that a stain that contains only a small amount of A, for example, will remove all the anti-A. . . .
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