10 



Amido-acid, including a benzene nucleus: 



Tyrosin (oxy-phenyl-a-aiuido-propiouic acid), 

 Betaitie bases : 



Betaine. 

 Guanidine lasts : 



Kreatin. 



Kreatiniii. 

 Bases and neutral amids relaied to uric acid: 



Hypoxauthine (sarkine). 



Carnine. 



Allautoine. 



As representatives of the proteids and allied substances the following 

 were used : 



Albumin, from white of egg. 



Albumin, from blood. 



Fibrin, from blood. 



Casein, from milk. 



Legumin, from peas. 



Globulin (para-globulin), from serum of blood. 



Vitellin, from yolk of egg. 



Myosin, from muscular tissue. 



Syntonin (acid-albumin), from muscular tissue. 



Haemoglobin (mainly oxy-hamioglobiu), from blood corpuscles. 



Albumose, from egg albumin. 



Peptone, from fibrin of blood. 



Gelatin, from skin. 



Chondrin, from cartilage. 



SOLUTIONS USED IN EXPERIMENTS. 



These were, for the experiments by precipitation, brought into solu- 

 tion as follows, involving, as will be seen, change of chemical constitution 

 in some cases : 



Albumin, i 



Hemoglobin, $ di s solved " cold water. 



Gelatin, > ,. 



Chondrin, \ ^solved in hot water. 



Fibrin, brought sparingly into solution by prolonged action of a 10 per cent 

 solution of sodium chloride in water. 



Fibrin, digested with a 4 per cent solution of caustic soda, and the solution 

 afterwards acidified with acetic acid. 



Casein, dissolved in 1 per cent solution of caustic soda, and the solution 

 cautiously treated with dilute acetic acid to an extent just short of coagu- 

 lation. 



Globulin, dissolved in 5 per cent solution of sodium chlorid. 



Vitelliu, > 



,r . > dissolved in 10 per cent solution of sodium chlorid. 



Syntonin, dissolved in 0.1 per cent solution of hydrochloric acid. 

 Albumose, from the early stage of digestion of egg albumin by means of 



pepsin and 0.2 per cent solution of hydrochloric acid. 

 Peptone, from advanced stage of digestion of blood fibrin by means of trypsiu 



and 0.25 per cent solution of sodium carbonate. 



