GraJiain-Sniitli 



:34l 



I'ercuntage 

 of positive 



(<;7o) 



1 (<i "A,) 



4(26-V„) 



This antisLTum was made by l)r Nuttall, who has recorded the results 

 of" tests therewith iqxju Mainiualian and Avian sera. When the above 

 tests were made the antiserum had lost some of its power; but it, 

 nevertheless, gave well-marked reactions with most of the egg-albununs. 

 One egg-albumin, that (tf the chaffinch, f(^r some unknown reason failed 

 to react with any of the anti-egg sera. A moderate reaction was 

 obtained also with the blood serum of one Chelonian (tortoise). 



(2) Tests luith Anti- Back's- Egg Serum. 



This antiserum was made by repeated intraperitoneal injections of 

 the egg-albumin of the domestic Duck into a Rabbit. 



Material tested . 

 27 E(j(j-Alhumins 



(a) 15 Birds' egg-albumins 1 (6"/,,) 



(b) 2 Reptile „ 1 



(c) 3 Amphibian ,, 3 

 ((0 7 Fish „ 7 



120 Blood Sera 



1 15 Chelonia 12 



60 Eeptilia J ^ Crocodilia 4 



13 Lacertilia IS 



28 Ophidia 28 



18 Amphibia 18 



39 Pisces 39 



12 Arthropoda 12 



+ 



Percentage 



of positive 



+ reactions 



8 (20"/,,) . 3(20"/,,) 8(537,,) 93 

 1 . . . 50 





 



3(13"/,,) l(7''u) 



This antiserum was decidedly more poweiful than the last. The 

 maximum reactions were confined to the birds' egg-albumiiis, but small 



