FOODS HUMAN NUTRITION. 767 



Ilyg., 61 (1907), No. 3, pp. 187-216, figs. 3, dgms. 8).— Using a dog operated 

 upon according to the I'awlow method, it was found tliat tlie same results as 

 regards stimulation and flow of gastric juice could not be obtained with yeast 

 extract as with meat extract. The physiologically active constituent of meat 

 extract, according to the experimental data, is present in the portion which can 

 be separated by dialysis. 



Further observations on the nature of feces fat, J. H. Long and W. A. 

 Johnson {.Jour. Aincr. Chcm. Soc, 29 (1907), No. S, pp. 121 J,-1220).— The 

 authors conclude that their experimental data as a whole point to the presence 

 of a lecithin-like body in the crude extract fat of feces. The opinion that feces 

 fat contains no lecithin " probably holds true as far as the larger part of the 

 food lecithin is concerned, but there is evei-y reason to believe that a fraction, 

 and perhaps a large fraction, of that found in the feces does not come from 

 the food but from the bile, as a product of the constant breaking down of cells 

 of the liver." 



The fact that the bile of different animals has a high lecithin content has 

 a bearing on the question under consideration and the authors believe that 

 the phosphatic or lecithin bodies of the feces should be regarded as excretory 

 products rather than waste or unabsorbed material from the food. " In patho- 

 logical conditions the food fat with its small lecithin content may And its way 

 in part into the feces, but in health it is possible that the other source sug- 

 gested is the more important." 



Earlier work has been noted (E. S. R., 18, p. 065). 



Observations on body temperature, blood pressure, and alveolar tensions 

 of athletes, L. Hill and 'SI. Flack {Jour. Physiol., 36 {1907), No. 1, pp. XI, 

 XII). — In experiments with young men engaged .in athletic work it was found 

 that the longer the period the higher the body temperature, the maximum 

 recorded rectal temperature being 105° F. after a 3-mile race. Blood pressure 

 was increased by muscular work, but in all cases rapidly fell to normal or 

 lower as the subjects rested and the panting became less. 



" The alveolar air was collected by Haldane's method and the results show 

 that the pulmonary ventilation was more than sufficient to keep normal the 

 alveolar tensions of CO- and O2. It does not appear that the extreme dyspnoea 

 following the race can be caused by increased tension of CO2 or diminished 

 tension of O2 in the blood." 



Respiratory metabolism in fatigue, O. Forges and E. Pribram {Bioclicm. 

 Ztschr., 3 {1907), No. r>-6. p. .',.',3; ahs. in ZcntM. Physiol, 21 {1907), No. 10,, 

 p. 328). — rlu periods inuuediately following severe work metabolism is in- 

 creased and the respiratory quotient is normally low because of the reduction 

 of carbon dioxid. When fatigued the body rajuires a greater amount of energy 

 for a detinito ainount of work. The experiments were made with a dog. 



Metabolism during starvation. II, Inorganic, • E. P. Cathcabt and C. B. 

 Fawsitt {Jour. Physiol., 36 {1907), No. 1, pp. 27-32). — In fasting a steady 

 fall in the outi)Ut of chlorin, phosi)horic acid, total sulphur, eaU-ium, and mag- 

 nesium was noticed from first to last in a jteriod covering 14 days. The outimt 

 of inorganic sulphates followed total suli)hur very closely. The daily outiiut 

 of ethereal sulphates was small, and the output of neuti*al sulphur fairly reg- 

 ular. Earlier work has been' noted (E. S. E., IJ), p. 070). 



The influence of a one-sided diet or of insufficient food upon the glycogen 

 content of the animal body, E. Pfluger (.4rc/(. Pliysiol. [Pfliigrr], 119 {1907), 

 No. 3-.'i, pp. 117-126). — From the experimental data reported it seems extremely 

 probable, according to the author, that in fasting the liver ccmtinues to form 

 glycogen until the animal dies of starvation. If excessive amounts of either 



