076 



EXPERIMENT STATION RECORD. 



The flying mechanism of insects,. C. Janet (Compt. liend. Acad. Sci. Paris, 128 

 (1899), No. d, pp. 249-258). 



On the head formation of Hymenoptera at the time of their passing into 

 the nymphal stage, L. G. Seukat (Compt. Rend. Acad. Sci. Paris, 128, 1899, No. 1, 

 pp. 55, 56). 



FOODS— ANIMAL PRODUCTION. 



On the cleavage products of casein in pancreatic digestion, 

 U. Biffi (Arch. Path. Anat. u. Physiol. [ Virchow], 152 (1898), No. 1, pp. 

 130-157). — A number of experiments are reported. The principal con- 

 clusions follow: Under favorable conditions casein is completely 

 digested. About 4 per cent of the total amount of casein is converted 

 into tyrosiu. The final cleavage product of casein (casein antipeptone) 

 has the following percentage composition: G 49.7, H 7.2, N 16.3 (S 1.3), 

 O 25.2. In properties and reaction it is like fibrin-antipeptoue. The 

 casein albumosesmay.be divided into 2 groups, primary and secondary, 

 and agree in their reaction with those from fibrin. Casein- phosphorus 

 occurs in the products of digestion in 2 forms, one may be precipi- 

 tated with magnesium mixture and the other not. The phosphoric 

 acid compound increases with the length of the period of digestion 

 and the amount of ferment present, while the other phosphorus com- 

 pound is diminished. Further, the organic phosphorus can be con- 

 verted into the inorganic compound by the action of dilute alkali 

 solutions and by boiling with barium carbonate in the same way as 

 the phosphorus compounds derived from casein by digestion with 

 pepsin and hydrochloric acid. 



Dietary studies in Chicago, reported by W. O. Atwater and A. P. 

 Bryant ( U. S. Dept. Agr., Office of Experiment Stations Bid. 55, pp. 

 76). — A number of investigations were conducted among families of for- 

 eign birth or origin in the thickly congested West Side of Chicago. 

 A number of samples of food were analyzed in connection with the 

 study. In general the usual methods were followed. In some cases the 

 statistics were prepared by the families themselves and the results thus 

 obtained are regarded as not entirely reliable. The average results 

 follow: 



Average results of dietary studies — cost and amounts of nutrients eaten per man per day 



Italians, average of 4 



French Canadians, average of 5 



Orthodox Kussian Jews, average of 10 a... 

 Orthodox Kussian Jews, average of 4 6 — 

 Unorthodox Kussian Jews, average of 6a. 



Bohemians, average of 8 b 



Bohemians, average of 25 a 



American professional men, average of 3 . . 



Cost. Protein. Fa, <£boh y - »£ 



Cents. 

 15.8 

 22.1 

 18.4 

 19.0 

 22.0 

 11.5 

 19.7 

 29.1 



Grams. 

 103 

 118 

 121 

 120 

 153 

 115 

 143 

 104 



Grams. 

 Ill 

 158 

 87 

 101 

 105 

 103 

 135 

 121 



Grains. 

 391 

 345 

 410 

 406 

 430 

 360 

 424 

 429 



Calories. 

 3, 060 

 3,365 

 2,985 

 3,095 

 3, 365 

 2, 885 

 3,580 

 3,310 



a This average includes both those studies in which the statistics were kept by the families them- 

 selves and those in which the statistics were kept by those in charge of the investigations. The 

 figures are not to he considered as entirely reliable. 



6 This average includes only the studies in which the foods were weighed by those conducting the 

 studies. 



