"360 Messrs, J. A. Gardner and F. W. Fox. Origin and 



material obtained by a sub-committee of the Eoyal Society Food (War) 

 -Committee in experiments on the digestibility of breads made from different 

 ■kinds of flour (1918), and by Gardner and Fox in their experiments on the 

 digestibility of cocoa butter (1919). 



The Diets consumed. 



The daily diet of the subjects of the bread experiments consisted approxi- 

 mately of — 



grm. 



Bread 800-1000 



Minced meat 50 



Butter 50 



Jam 100 



Milk 600 ^ 



Cheese 50 



Sugar 30 



Tea ad. lib. 



The diet of the subjects of the cocoa butter experiments was the same, except 

 that the butter was replaced by cocoa butter. 



In the Tables in this paper the diets are referred to as A, B, C, D. In A 

 the bread was made from 80 per cent, milled flour, in B from 90 per cent, 

 milled flour, and in C from 80 per cent, milled flour mixed with 20 per cent, 

 maize. In D the bread used was the ordinary white bread of the shops 

 {July, 1918). Some latitude was allowed for individual taste; for instance, 

 subject r. J. in the bread experiments omitted the meat ration, and W. J. 

 omitted the cheese, and subject C. took a certain amount of light beer. 



Subjects used in the Experiments. 



An account of the eight subjects, four in Cambridge and four in London 

 who took part in the bread digestibility experiments is given in the above- 

 mentioned report, and of the three subjects of the cocoa butter experiments 

 in Messrs. Gardner and Fox's paper. The latter paper also contains an 

 account of the fat utilisation in both series. 



Experimental Methods. 



The general procedure was fully described in the Eoyal Society report, 

 ■but we may mention that the diets were consumed for periods of ten days, 



the six significant days being the fourth to ninth inclusive. The collection 

 >of faeces began one day later, and continued one day longer than the days of 



the diet. Accurate accounts of the weights of the food eaten were kept, and 



