206 



Tests loith Precipitins 



Beactions 



* 4 Rheidae. 



t Egg-white of fowl, several specimens of which gave same result. 



J 8 of these dried on filter-paper. (See text, p. 207, top.) 



§ No. 815 dried on paper, sent from Central Africa. 



17 "/o 



(2) 630 Tests ivith Anti-Emus Egg- White. 



The antiserum used in the following tests was obtained by treating 

 a rabbit with the egg-white of Dromaeus novae-holla ndiae Vieill., the 

 emu (No. 799), received from the Zoological Society's Gardens, London. 

 This antiserum was fairly powerful. Standardized by Dr Graham-Smith, 

 it gave a precipitum of 028 c.c. when tested after being stored 5 months 

 on ice, 1 c.c. of antiserum being added to "5 c.c. of 1 : 21 solution of 

 emu egg-white. 



The preceding table shows that the antiserum for the egg-white 

 of the emu only produced a large reaction with the dilution of the 



