776 EXPERIMENT STATION RECORD, 



to Ihe exclusion of other processes, such as the iihsori)tlon and assimilation of 

 the more advanced products of dif^estion of the protein of the food." 



On the assimilation of protein introduced enterally, II. ruiNiiLi-: and W. 

 Cramer {Jour. FliysioL, 37 {J908), No. 2, pp. 15S~16'i). — The results of the in- 

 vestigations show " that the intestinal mucous membrane of digesting animals 

 is very much richer in incoagulable nitrogen than that of fasting animals. The 

 most pronounced difference is found in the lymphoid nodules of the intestinal 

 wall, where the residual nitrogen appears to be collected. 



" The blood of digesting animals shows a small but distinct increase of 

 residual nitrogen over the blood of fasting animals." 



In general the results are analogous to those noted above " and allow the con- 

 clusion that the assimilation of protein from the intestinal canal is brought 

 about pai-tly at any rate by the agency of the leucocytes. Part of the nitrog- 

 enous material may be absorbed by a different path and undergo a different 

 fate." 



Studies of the precipitin reaction and heated proteins, W. A. Schmidt 

 (Biochem. Ztschr., IJ, (1908), No. 3-4, pp. 29-J-3//8 ) .— From his studies of the 

 precipitin reaction the author concludes that the animal body possesses the 

 ability to regenerate proteids so that the original characteristics are apparent 

 even if the proteids have been acted upon by heat, allialis, and enzyms. 



Assimilation of animal and veg'etable fat by man, V. Gerlach {Ztschr. 

 Diatet. u. Phys. Ther., 12 (1907), p. 102; ahs. in Biochem. CentU., 7 (1908), No. 

 13, pp. 497, Jf98). — From experiments of long duration of which he himself was 

 the subject the author reached the conclusion that there was no difference in 

 the digestibility of animal and vegetable fats. The materials used were butter 

 and a conmiercial l)utter substitute prepared from cocoanut fat. 



The uric acid excretion of normal man, P. J. Hanzlik and P. P>. Hawk 

 (Jour. Biol. Chctn., .5 (1908), No. 4, pp. 355-359). — The conclusions drawn from 

 the experiments reported follow : 



" The average daily excretion of uric acid for 10 men, ranging in age from 

 19 to 29 years, and fed a normal mixed diet was 0.597 gm., a value somewhat 

 lower than the generally accepted average of 0.7 gm. for such a period. 



" The average daily protein ingestion for these same subjects, when permit- 

 ted to select their diet, was 91.2 gm. or 1.33 gm. per kilogram of body weight." 



Experiments on the daily variation in the work of the kidneys on a con- 

 stant diet, M. P.raet^ner (Ztschr. Klin. Med., 65 (1908), p. 438; abs. in Zcnthl. 

 Gesam. Physiol, u. Path Stofficcchsels, n. ser., 3 (1908), No. 20, p. 789).— Wide 

 variations were noted in the nitrogen and chlorin excretion and the molecular 

 diuresis on diets with both a limited and a normal amount of common salt. 



Increased body temperature of men working in hot climates, S. Kurita 

 (Arch. Schiffs u. Tropen Hyg., 11, (1907), No. 21, pp. 682-683).— Observations 

 made with stokers showed increased body temperature, pulse rate and rate of 

 respiration as compared with engineers woi'kiug at a somewhat lower tempera- 

 ture. After about 2 hours the body temperature again dropped to normal. The 

 author concludes therefore that at least 2 hours' rest is essential after work has 

 been performed where the air is excessively hot. 



The minimum physiological energy requirement, J. Lefevre {Jour. Physiol, 

 et Path. 06n., 9 (1907), pp. 939-947; ahs. in BibUographia Physiol., 3. ser., 3 

 (1907), No. 3-4, p. 275). 



Direct calorimetric measurement of the minimum physiological energy 

 requirement, J. Lefevre {Jour. Physiol, ct Path. G6n., 9 (1907), pp. 969-977: 

 abs. in BihMographia Physiol., 3. ser., 3 (1907), No. 3-4, p. 275).— According 

 to the author all heat iu excess of 1,450 calories per day eliminated by the 



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