324 Quantitative Precipitin Tests 



Here an immediate and marked reaction only took place with sheep 

 blood, a marked clouding in that of Cervus, a faint clouding in that 

 of the dog. The figure for the cat appears too high. 



Tests with Anti-Sheep Serum (15. II. '02). Seiies II. 



Antiserum from another rabbit (B) treated as before. 



In this series the bloods of two sheep (4. I. and 10. II. '02) gave 

 a precipitum of '0185 and '022 respectively in 1 : 100 dilution (average 

 02), the corresponding figures in 1 : 200 dilution being '0135 and -Oil. 

 Tests conducted as before, '02 being taken as 100 gave the following 

 results : 



Blood of Date Percentage 



Ovis aries 100 



Bos bovis 1. i. 02 75 



Cobus unctuosus 8. ii. 02 67 



Rangifer tarandus 4. ii. 02 35 



Sheep serum dried in scales 19. iii. 01 gave in 1-100 dilution in 1-200 dilution 



017 -015 J 



fluid, with chloroform '025 -0125>c.c. precipitum 



sealed in tubes '02G -01551 



Tests iuith Anti-Sheep Serum (11. ill. '02). Series III. 

 Antiserum from a third rabbit treated as before. 



Blood of Date Precipitum amount Percentage 



Ovis aries -051 100 



243 Capra megaceros 23. x. 01 -02 39 



Bos bovis 3. ii. 02 -019 37 



486 Cobus unctuosus 8. ii. 02 -017 33 



483 Bangifer tarandus 4. ii. 02 '015 29 



502 Cervus porcinus 15. ii. 02 -Oil 22 



Sus scrofa 26. xii. 01 -002 4 



Equus caballus 10. vi. 01 -0015 3 



The antiserum in this case was exceptionally powerful, and it 

 appears due to this fact that such a contrast is noted in related 

 Ungulate bloods. The results with the bloods of other Bovidae and 

 the Cervidae appear fairly uniform, whereas very little reaction was 

 obtained with the bloods of the pig and horse. 



The results with 28 other mammalian bloods were as follows: 



Primate*. 8 bloods examined from 7 species: Man (2 samples gave and 3/ reaction), 

 Ourang and Chimpanzee (0/ ), Mandrill and Baboon (4 / ), Gorilla and Ateles (6 and 

 10 / respectively, but both these sera were thick and certainly somewhat concentrated 

 through keeping). 



