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(2) Tests with Anti-Tortoise Set-urn (T. vieina). 



Amount of 

 Material tested precipitum Percentage 



Tortoise serum (T. vioiua) -0234 100 



(T. ibera) -0054 24 



Turtle -0028 12 



Alligator ,, . 



Tortoise egg-albumin 



Duck's -0056 24 



Traces of precipita were given by Emu's, Fowl's, Silver Pheasant's, 

 Pheasant's, Greenfinch's and Thrush's egg-albumins, but Crane's, Black- 

 bird's, Moorhen's, Hedge-sparrow's, Chaffinch's, Skate's and Dogfish 

 egg-albumins, as well as Frog, Amphiuma, and Dogfish sera, failed to 

 react. 



The results of these tests again agree fairly closely with those done 

 by the qualitative method. In these a full reaction was indicated with 

 Tortoise serum (T. vieina) and small reactions with Tortoise (T. ibera), 

 and Turtle. Alligator serum showed a doubtful reaction, whereas Duck's 

 egg-albumin gave a medium precipitum. No signs of reaction were 

 obtained qualitatively with Fowl's, Pheasant's and Thrush's egg- 

 albumins, but quantitatively they yielded traces of precipita. 



(3) Tests with Anti-Turtle Serum. 



Amount of 

 Material tested precipitum Percentage 



Turtle serum -0300 100 



Tortoise '0018 6 



Alligator '0009 3 



Emu's egg-albumin '0037 12 



Pheasant's ,, '0028 9 



Duck's ,, trace 



Fowl's ,, 



Moorhen's ,, 



The results in this case differ slightly from the qualitative experi- 

 ments. In the latter, Tortoise serum showed a full reaction and the 

 quantity of precipitum yielded ought accordingly to be more than 6 % 

 of that given by Turtle serum. Fluid Alligator serum on the other 

 hand failed to react. Emu's and Pheasant's egg-albumins showed small 

 reactions, but Duck's, Fowl's and Moorhen's egg-albumins failed to react, 

 although by the quantitative method they showed traces of precipita. 



232 



