326 



Quantitative Precipitm Tests 



From the above it will be seen that the larger reactions are all 

 confined to Bovidae and Cervidae, although from some cause the last 

 two of these (Nos. 595 and 502) gave low figures. These measurements 

 were unfortunately not made in duplicate consequently there is no 

 control. Nevertheless the result agrees fairly with those obtained with 

 other antisera of this class. It will be seen that the whale (b'98) gives 

 a higher figure than either the horse or pig, although the difference 

 is very slight. 



Tests with Anti-Meoncan-Deer tierum (I. vi. '02). 



Antiserum from rabbit treated with the serum of Cariacus 

 mexicanus (631). 



Precipitum 



liloocl of Date 



631 Cariacus mexicanus 

 483 Bangifer tarandus 



502 Cervus porcinus 

 486 Cobus unctuosus 

 Ovis (domestic) 

 Bovis (domestic) 

 590 Capra hircus 

 595 Ovis burrhel 

 243 Capra megaceros 

 696 Sns scrofa 



n ' 

 694 Equus caballus 



Cetacea 

 698 Balaenoptera rostrata 30. iv. 02 -006 



Percentage 



100 Died from phthisis, pleurisy. 

 146 ? serum with clots, probably 

 concentrated. 



40 



Of other mammalian bloods, those of Carnivura (11) gave 15/o 

 reaction, those of Primates (7) gave 18 /o reaction, the percentage given 

 being the average for the groups. On the other hand the bloods of 

 Marsupialia (8) all gave no trace of reaction. 



From the above we see that the high percentages are confined to 

 Cervidae and Bovidae amongst the Ungulata. The high percentages 

 obtained with non-homologous bloods in these groups is difficult to 

 interpret, the blood-relationship appears very close in any case. The 

 bloods of Sus and Equus give results remarkably in accord, and birth 

 are practically the same as with the Rorqual (Balaenoptera). A very 

 moderate reaction is observed with the bloods of Carnivora and Primates, 

 both being fairly equal, whereas the distance separating the Marsupialia 

 is clear from the total absence of reaction with their bloods. 



