566 EXPERIMENT STATION RECORD. 



runetion of a foodstuff, tbe definition of tlie term " foodstuff," the isodynamic 

 replacement of nutrients in connection with the protein minimum and other 

 questions are discussed. 



Maintenance ration at different ages, E. Maurel (Rev. Soc. iSci Ilyg. 

 Aliment., 3 {1906), Ko. 5, pp. 763-85.^). — A summary of available data and of 

 the author's experiments, from which dietary standards are deduced for varying 

 conditions of age, sex, body weight, activity, and surrounding temperatui-e. 

 For normal maintenance the author believes that the protein consumption need 

 only slightly exceed 1 gm. per day per kilogram body weight during the first 

 months after birth, and 1.75 gm. during infancy, gradually diminishing to 1.5 

 gm. during middle age and to less than 1 gm. during old age. He does not 

 believe that smaller amounts than these are safe. On the same basis, the sug- 

 gested energy requirement is 65 to 70 calories per day per kilogram of body 

 weight at birth, 35 to 38 calories in middle life, 30 to 35 calories in the first 

 period of old age, and 25 calories, or perhaps lower, in extreme old age. 



School diet, P. Legendre {Abs. in Rev. Sci. [Paris], 5. ser., 9 (1908), No. 23, p. 

 723). — A discussion of the character and effects of the diet in French schools 

 with reference to adequacy and hygienic requirements. 



The autlior believes that children should not have meat until 7 years old and 

 that the normal meat ration from 7 to 11 years is 100 to 120 gm., from 11 to 10 

 years 120 to 1(;0 gm., and thereafter 2(»0 gm. or more ]>ev day. 



The regime and diet of a man engaged in intellectual work, M. de Fleury 

 (Rev. Soc. Sci. Hyg. Aliment., 3 (1906), No. 5, pp. S55-87S).— Chiefly a discus- 

 sion of data relative to mental work and its relation to dietary requirements. 

 Of 166 cases of sickness among brain workers of a sedentary life in which the 

 symptoms were primarily those of nervous exhaustion, the author states that 

 his diagnosis developed the fact that the great majority were due to errors in 

 diet, as through overeating, abuse of meats, fatty foods, alcohol, coffee, tea, 

 tobacco, and other stimulants. In his opinion the majority of brain workers 

 over 40 years of age exercise too little and eat too much, and he i)roposes 

 menus supplying about 82 gm. protein and 2,200 calories of energy per man per 

 day, which he deems suitable for the average mental worker. 



Chemical problems in hospital practice, O. Folin (Jour. Amer, Med. Assoc., 

 50 (1908), No. 18, pp. 1391-1 39-'i). — A summary and discussion of problems re- 

 lating to nutrition, particularly phases of the creatin and creatinin question 

 and other questions concerning metabolism. 



The excretion of sulphurous acid by man in experiments with sodium sul- 

 phite, F. Fkanz and (J. Sonntag {Arh. K. asndlttsunit., 28 (19U8), pp. J2.J-260; 

 uhs. in Cliem. Zenthl., 1908, I, No. 15, pp. 11,77, i-//78).— In a study of sulphur- 

 ous acid, its sodium salts and their effects, it was found that the acid is very 

 largely excreted in the urine as sulphate. However, with special precautions 

 and within 10 minutes to a quarter of an hour after it was taken it was pos- 

 sible to detect SO2 in the urine though the amount recovered was never greater 

 than 1 per cent. 



A respiration calorimeter, M. Letulle and Mlle. M. Pompilian (Rev. Soc. 

 Sci. Ilyg. Aliment., 3 (1906), No. .'1. pp. 6.'f5-665, figs. l.)). — The resi)iration 

 calorimeter referi-ed to in a previous note (E. S. R., 18, p. 962) is described in 

 detail. 



ANIMAL PRODUCTION. 



Analyses of commercial feeding stuffs, B. L. Hartwell, J. F. Morgan, and 

 L. F. Whipple (Rhode Island Sta. Bui. 127, pp. 162-179). — Analyses are re- 

 ported of animal meal and bone, cotton-seed meal, linseed meal, gluten feed, 

 brewer's grains, malt sprouts, wheat middlings, wheat bran, mixed feeds, prov- 



