CERTAIN DERIVATIVES OF THE PROTEIDS. 283 



product and also in view of the peculiar significance which is 

 attached to this substance through recent chemico-physiological 

 research.* Furthermore, we have been impressed with the 

 importance of having true antipeptone for experiment, and 

 consequently, we have employed pure antialbumid as the 

 mother substance from which to prepare the antipeptone. 

 Following is a list of the substances studied, all of which were 

 prepared with great care according to the methods detailed in 

 the second part of this paper. 



Antialbumid (A), formed from coagulated egg-albumin by the 

 action of dilute sulphuric acid at 100 C., and purified by 

 digestion with pepsin-acid, etc. 



Antialbumoses (B), formed by the digestion of the above anti- 

 albumid with gastric juice. 



Antialbumoses (C), formed by the digestion of the above antial- 

 bumid with pancreatic juice. 



Antipeptone (D), formed by the digestion of antialbumid with 

 pancreatic juice. 



Antialbumid (E), a more insoluble form, separating from an al- 

 kaline solution of the above antialbumid when subjected to 

 pancreatic digestion. 



Antialbumid (F), prepared from crystallized edestin by the action 

 of dilute sulphuric acid. 



Hemialbumoses (G), formed from coagulated egg-albumin by 

 dilute sulphuric acid. 



Heteroalbumose (H), formed in a similar manner. 



Hemipeptone (I), formed by the same method as the hemial- 

 bumoses. 



Protogelatose ( J), formed from pure gelatin by gastric digestion. 



Deuterogelatose (K), formed by pancreatic digestion. 



Oelatin-peptone (L), formed by pancreatic digestion. 



Albumose-like body (M), formed from coagulated egg-albumin by 

 the action of dilute sulphuric acid at 100 C. 



Influence on blood-pressure. The first more comprehensive 

 and systematic study of the physiological action of proteoses 

 and peptone individually was made by Grosjean.f This 



* Siegfried et al. 



t Grosjean, Archives de biologie, 1892, xii. This paper contains refer- 

 ences to the earlier literature. 



