88 Biological Section, American Chemical Society [Oct. 



Arthur. ( Univcrsity of Illinois.) The fatty acids obtained from 

 hydrolyzing purified kephalin in a dilute hydrochloric acid Solution 

 were separated by the lead acetate method into the saturated and 

 unsaturated fatty acids. The saturated-acid fraction represented 

 about one-third of the total and was found to contain stearic and 

 palmitic acids in the ratio of three to one. The unsaturated fatty 

 acids were separated by the bromination method into clupanodenic, 

 linolic and oleic acids. The amount of clupanodenic acid present 

 was small — less than 2 percent. The linolic acid was found to rep- 

 resent about one-sixth, oleic acid about one-third, of the total fatty 

 acids. 



A metabolism experiment with swine. E. B. Forbes. {De- 

 partment of Nutrition, Ohio Agricultural Experiment Station, 

 Wooster.) The usual practical rations for swine contain an excess 

 of acid over basic mineral Clements. Urinary ammonia varies 

 directly with this excess of mineral acid, provided the protein intake 

 remains the same. Increased protein intake increases urinary 

 ammonia. This excess of mineral acid in practical swine rations 

 does not seem to affect calcium retention. 



Water drinking causes the elimination of sodium and chlorin; 

 abstinence from drinking leads to their retention. The feces may 

 contain an abundance of sodium but are nearly free from chlorin. 

 Potassium, magnesium and chlorin balances were usually positive, 

 but were negative during periods of maximum intake, apparently 

 through over-response in the way of protective elimination of the 

 excess ingested. 



Calcium retention was satisfactory only on rations including 

 meat meal (containing considerable bone) and skim milk. Neither 

 cereals nor soy beans furnish the calcium requisite for growth. An 

 excess of magnesium over calcium caused loss of calcium with a 

 ration of rice polish and wheat bran. The excess of magnesium 

 over calcium in corn and in other practical rations does not appre- 

 ciably restrict calcium retention. The important deficiencies of corn 

 are, in order of magnitude, calcium, phosphorus, and nitrogen. 



Creatinin elimination was entirely independent of food but 

 varied in the same order as live weight, weight of dressed carcass, of 

 flesh, of bones and of blood. 



