134 W. M. Wallace, W. B. Weil and A. Taylor 



protein-high electrolyte and on low protein-low electrolyte 

 diets has been examined. Analysis of the whole body for 

 protein, water, fat, ash, sodium, potassium, chloride, calcium, 

 phosphorus and magnesium was performed on animals allowed 

 to double their weaning weights on the enumerated diets. 



The animals on the low protein intakes grew significantly 

 less and their bodies contained more fat. The composition of 

 the fat-free bodies on a unit basis were all essentially similar 

 despite the variation of the food intake. The principle dif- 

 ference resulting from variation in intake was in the quantity 

 of the skeletal constituents in the various groups. The 

 animals consuming the low protein rations contained more 

 calcium and phosphorus on a unit basis than did the high- 

 protein-fed animals. 



On the high protein intakes accretion of skeletal minerals 

 was dependent upon the level of electrolyte intake, being 

 higher in the high-electrolyte-fed animals. In the low- 

 protein-fed animals accretion of skeletal minerals was less 

 affected by the level of electrolyte intake. 



Only in the animals on the high electrolyte diets did in- 

 creased protein intake result in increased protein content of 

 the body. 



The significance of the data for nutritional evaluation is 

 discussed. 



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