552 



Mr. A. W. Blyth. 



[Apr. 11, 



and phosphoric acid equilibrium, and some small retention of salts. 

 There 'was a daily excretion of sulphur and chlorine, the latter in 

 small amount only. 



Third Period. A sufficient Supply of Whole Meal. 



of Weight. 



Arrest of Loss 



During this last period there was retention of nitrogen. The phos- 

 phates were pretty well balanced, that is, ingestion was nearly equal 

 to excretion, 83'6 per cent, of the total dry substance was digested, 

 but only 36 per cent, of the fat. It is to be noted that there was an 

 undiminished urinary output of chlorine and sulphur. 



The constant undiminished excretion of sulphuric acid as sulphate 

 by the urine and a small quantity of unoxidised sulphur by the intes- 

 tinal canal, although only traces were found in the flour itself, 

 rendered it desirable that there should be a control experiment upon 

 some other person. Accordingly, an Oxford graduate, upon whom 

 every reliance could be placed, undertook to live for one week upon 

 whole meal and distilled water. This gentleman will be referred to 

 as 0. 



O lived a sedentary life, was of a slight build, and weighed 137 Ibs. 

 at the commencement of the experiment. He took also each day a 

 measured quantity of olive oil, the oil being mixed with the whole 

 meal and baked with it. The quantity of whole meal taken daily 

 varied from 16 22 ozs. The solid excreta of the last three days only 

 were collected for analysis, and the urine of the last two days. 



