TRANSFUSION BLOOD TESTS 1 19 



This method is especially valuable when a very great number of donors 

 are to be examined. If, however, a sufficient amount of serum is obtain- 

 able the editor prefers the first method as it is a good deal simpler; then, 

 too, the total amount in each test is the same, thus allowing better of 

 comparison as to the intensity of hemolysis. 



