Anti-Simian Sera 169 



81 Tests ivith Anti-Ourang Serum. 



The antiserum used in these tests was produced by injecting a 

 rabbit with the serum of Siitiia satyrus, which died at the Zoological 

 Society's Gardens (No. 38). The antiserum was of moderate power. 

 Here again the tests were limited to those upon the bloods of Primates, 

 the bulk of the antiserum being reserved for studies by the quantitative 

 method reported in Section VII. Standardized 6 weeks after these 

 tests were made, this antiserum gave a precipitum of "008 c.c. 



23 HouiNiDAE (4 races) 



8 SiMiiDAE (3 spec.) 



32 Cercopithecidae (23 spec.) 

 12 Cebidae (8 spec.) 



4 Hapalidae (3 spec.) 



2 Lemuridae (2 spec.) 



We see here that the results are again mainly in accord wath the 

 preceding. It is jjossibly due to the fact of the human blood 

 dilutions being somewhat weaker (old dried bloods mostly) that the 

 human bloods gave lower values here. The quantitative tests made 

 with fluid sera gave results similar to those in the two preceding 

 tables. Owing to the fact that this antiserum was more powerful 

 than the anti-chimpanzee serum the greater number of the bloods 

 of Cercopithecidae gave medium reactions. Of the 5 that gave 

 negative results 3 were samples from India, Borneo, and China 

 respectively, 1 came from New York (gave a * with anti-monkey), 

 and the fifth sample had been dried one year. Similarly the 2 giving 

 feeble reactions ( * ) came respectively from India and New York. 

 The 3 negative results with, human blood were with 3 samples 

 (Negro, Nos. 33 — 35) sent from W. Africa, these samples also showing 

 less than full reactions even with anti-human serum. The negative 

 result noted among Simiidae is due to the blood of a gorilla (No. 43) 

 which Dr Griinbaum informed me a year ago gave but feeble reactions 

 in his tests with anti-human and anti-chimpanzee serum. 



(4) Tests with Anti-Cercopithecus Sera. 



From my results with other anti-primate sera, it seemed of interest 

 to repeat a series of tests with an antiserum for Cercopithecidae, and 



