and Casein Peptone. 105 



We also prepared a peptone, entirely non-precipitable by saturation 

 with ammoniuni sulphate, by boiling 20 grams of pure deuterocaseose 

 with 500 c, c. of 3 per cent, sulphuric acid for 14 hours. This prepara- 

 tion, after purification, was too small in quantity for analysis, but in 

 reactions it showed close agreement with the antipeptones prior to 

 their long drying at 110° C, viz: non-precipitation by acetic acid and 

 potassium ferrocyanide, by nitric acid, by cupric sulphate, and by 

 saturation with ammonium sulphate both in neutral and in acid 

 solutions. 



Trans. Conn. Acad., Vol. VIII. 14 Nov., If 



