470 EXPERIMENT STATION RECORD. 



The diet in different institutions is discussed at loni,'ili and much interesting 

 material is recorded. 



Tlie report contains an introduction by II. Folks. 



Housekeeping eflBciency, C. Barnard (IlouseJceeping Expt. Sta. [Oonn.] Bui. 

 11, pp. 20, pis. 3). — Increased efficiency through correct house planning, the 

 use of conveniences and labor-saving devices, and the elimination of needless 

 work are discussed, and data recorded regarding the actual labor involved in 

 performing a definite task by different methods. 



[Problems of infant feeding] (Amer: Assoc. Study and Prev. Infant Mor- 

 taUtij Trans., 1 {1!H0), pp. 356, pis. 11, dgms. 3S).— Papers which have to do 

 with problems of infant feeding, milk supply, questions of home management, 

 education, and similar subjects are included in this report of the annual meet- 

 ing held in Baltimore, Md., November &-11, 1910. 



The time food remains in the body, and intestinal activity as affected by 

 treatment by warm flushing, A. IIiller {Dcut. Med. Wchnschr., 37 (.1911), 

 No. 17, pp. 781-78.'/, dgin. 1). — According to the author's conclusions, any given 

 meal does not pass through the intestine as a continuous mass, but various 

 portions may be widely separated during digestion. The influence of intestinal 

 movements on the passage of food through the digestive tract is discussed. It 

 was found that with healthy individuals food remained in the intestine from 

 18 to 42 hours. Raw peas were used as markers. Data obtained under patho- 

 logical conditions are also discussed. 



The tryptic digestion of casein, M. Siegfried {PflUger's Arch. Physiol., 136 

 (1910), pp. 185-202). — The results of an extended study are reported. Accord- 

 ing to the author, trypsin-casein-peptone on hydrolysis yields the largest amount 

 of ammonia and the smallest amount of nitrogenous material precipitated by 

 phosphotungstic acid of any of the materials studied by the method used. 



The constitution of protein and its cleavage and synthesis in the animal 

 body, I. KoNiG (Sitzher. Naturhist. Ver. Preuss. Rhehilande u. Westfalens, 1910, 

 No. 1, Sect. C, pp. Ji-12). — A valuable summary of data on this important 

 subject. 



i The influence of caffein on protein metabolism in dogs, with some remarks 

 on demethylation in the body, W. Salant and I. K. Phelps (Jour. Pharmacol, 

 and Expt. Ther., 2 (1911), No. 4, pp. 4OI, ^02).— The results of experiments 

 were reported in a paper presented at the second annual meeting of the Ameri- 

 can Society for Pharmacology and Experimental Therapeutics. 



" The resistance to caffein was found to vary with the amounts of the urinary 

 purius eliminated." 



1 The elimination of creatin and creatinin after the administration of 

 caffein, W. Salant and J. B. Rieger (Jour. Pharmacol, and Expt. Ther., 2 

 (1911), No. Jf, pp. J/OO, JfOl). — A brief abstract of a paper presented at the sec- 

 ond annual meeting of the American Society for Pharmacology and Experi- 

 mental Therapeutics. 



According to the authors, experiments on rabbits indicate that urinary 

 creatin is increased after the administration of caffein, the size of the dose 

 being an important factor. Neither the increased diuresis nor the diminished 

 appetite observed could, in the authors' opinion, be regarded as a factor in ac- 

 counting for the increased output of creatin. " The elimination of the creatinin 

 was variable in some rabbits, but in most of them it was practically not 

 affected by caffein." 



Chemical and microscopical studies of the transportation of fat through 

 the intestinal wall in resorption, A. Noll (Pfluger's Arch. Physiol., 136 

 (1910), pp. 2O8-247). — In general, the author concludes, on the basis of his 



