150 PROPERTIES OF ANTI-SERUM TO SERUM 



the results obtained, the details being as in former 

 tables : 



Human anti-serum *05 c.c. to each tube. 



The indicator was -5 c.c. suspension of red corpuscles of ox treated with 

 immune-body from rabbit. 



Chimpanzee 



TABLE 4 



Complement of rabbit 



It is thus seen that 0-000,01 c.c. gives no perceptible devia- 

 tion, whilst 0-000,1 c.c. deviates a haemolytic dose. In a 

 corresponding test made with human serum, it was found 

 that 0-000,01 c.c. of human serum produced the same devia- 

 tion as 0-000,1 c.c. of chimpanzee serum. We have also 

 tested the serum of a monkey, viz. Macacus rhesus, for 

 several samples of whose blood we are indebted to Mr. Jolly 

 of the Physiological Department of the University of 

 Edinburgh, and were rather surprised to find that it had 

 practically the same deviating power as the chimpanzee 

 serum. Several tests were made, and on every occasion 

 with similar result. Neisser and Sachs also obtained 

 negative results with the bloods of the rat, pig, goat, rabbit, 

 ox, and horse, when these were tested with an anti-human 

 serum. With monkey's serum an interference with haemo- 

 lysis was however obtained, the amounts of monkey's 

 serum being rather more than ten times the amount of 

 human serum necessary to obtain the same result : the 

 species of monkey is not stated. 



With regard to precipitates, the results of observa- 

 tions made at the same time are shown in the following 

 table : 



