149 



Tahi.k no. — Xitrofjei) records of the cold-iratei- extracts of raw meats {re.iiiltfi e.rprrxsed in 

 percetitutje <>/ total nitroijai of cold-water extract — Continued. 



n Average of 5 analyses. <■ Average of 3 analyses. 



b Average of 6 analyses. d Average of 8 analyses. 



c.\vcrage of 10 analyses 



From the foregoing table it will be seen that 29.85 to 54.52 per cent 

 of the soluble nitrogen was present in the form of compounds coagu- 

 lable by heat, the average quantity for the 13 samples of raw flesh 

 being 45.87 per cent of the total nitrogen of soluble compounds 

 precipitated by coagulation. By saturating the filtrate from the 

 coagulated proteid with zinc sulphate from 2.16 to 8.19 per cent of 

 the soluble nitrogen was precipitated as albumoses, the average 

 amount being 4.09 per cent. The average amount of nitrogen pre- 

 cipitated supposedly as peptones by bromin in the filtrate from the 

 zinc sulphate precipitate in six samples of raw meats was equal to 

 1.32 per cent of the total soluble nitrogen. 



The nitrogen of soluble proteids formed 39.23 to 58.76 per cent of 

 the total soluble nitrogen, averaging for the 13 samples 51.05 per cent. 

 The nonproteid nitrogen ranged from 41.24 to 60.77 per cent of the 

 total soluble nitrogen, the average being 48.95 per cent, and the nitro- 

 gen existing as ammonia or ammonium salts was on an average 2.42 

 per cent. 



The other reagents used precipitated the following average quanti- 

 ties of nitrogen expressed in terms of total soluble nitrogen: Bromin, 



