Niitfall and Stranr/eivai/s 



323 



'fefits with Aiifi-]hf/ Serum (25. tfi. '02). 

 Antisei-um t'roiu lubbit treated with the seniiii o'i Caim famiJvtrist. 



average 0-3 "/o 



No other bloods than those of Carnivora were tested. A canine 

 blood, that of the Jackal (859), gave 24 "/o reaction : the four succeed- 

 ing non-canine bloods gave fairly uniform results, a somewhat lower 

 figure being obtained with the last three. Owing however to the small 

 amount of precipitum obtained in these cases too much reliance cannot 

 be placed upon the figures. 



4. Quantitative Tests with Anti- Ungulate Sera. 



Tests luith Anti-Sheep Serum (18. n. '02). Series I. 



Antiserum from rabbit (F) treated with the serum of the domes- 

 ticated sheep {Ovis aries). 



In this series bloods of approximately the same age were taken 

 for testing. The sera of five sheep gave the following amounts of 

 precipitum: -0325, '0285, -0830, -0285, -0280, the average amount 

 "030 being obtained with 1 : 100 sheep serum dilution. The figures 

 obtained with 1 : 200 dilutions were somewhat lower, as might be 

 expected, but also remarkably uniform: -0215, -025, -0265, -020, -026, 

 •0235, the average here being "024. The results obtained were as follows. 

 With 1 : 100 blood dilutions taking the average amount obtained with 

 the blood of the five sheep (-03) as 100 : 



21 2 



