ANIMAL PRODUCTION. 969 



available, may serve in jiart to explain the iiiadequary of jjelatin as a source of 

 iiitrofren, and ninst I)e taken into account in any attempt to "restore" .irelatin to 

 full proteid value. 



"A specific relationship has been shown to exist between carliohydrates in- 

 icested and the elimination of nitrogen (or protein metabolism, as measured by 

 nitroseu output). Carbohydrate, not needed for combustion (extra metabolic) 

 is far more efficacious in reducing the nitrogen output (therefore favoring the 

 retention of proteid) than carbohydrate coming within the requirement for 

 potential energy. This fact indicates the importance of abundant carl)ohy- 

 drates for convalescence and growth, and may explain the almost universal 

 craving for sw(>cts. esitecially in the young."' 



The digestibility of mannans by diastase found in higher animals, (Jatin 

 and yiME. <iATiN {Bui. iici. PhannacoL, l) {I'.Wl), pp. J/.'f7-.i52 ; ahs. in Clicni. 

 ZcnthL, 1907, II, .A'o. i.}, p. 1181). — From artificial digestion exi)eriments with 

 .Tapanese edible algje, the authors conclude that the mannans ])resent are not 

 digested by man and higher animals. Their favorable effect on peristaltic 

 action is regarded as a possible explanation of their value in dietetics. 



Concerning- carbohydrate metabolism, K. Spiro (Beitr. Chcm. Pln/siol. ii. 

 rath., 10 (l!>07), No. 7S, pp. J77-2S6, fig. 1). — From the experimental data 

 reported the author concludes that protein and carbohydrate cleavage go hand 

 in hand and that the intermediate metabolic products obtained are not the same 

 when these foods are taken together as when they are taken singly. 



The influence of food preservatives and artificial colors on digestion and 

 health. Ill, Sulphurous acid and sulphites, H. W. Wiley, AY. D. Bigelow, 

 F. C. Webek, et al. {L\ ti. Dcpt. Agr., Bur. Chcm. BuJ. SJ, pt. 3, pp. YI+761- 

 lO'/l, figt^. 3). — A full report of the experimental data on the effects of sulphur- 

 ous acids and sulphites caiTied on as a part of the studies on the effect of food 

 preservatives on health. 



This work, which has been noted from a summary previously published (E. S. 

 II.. 19, p. 668), led to the general conclusion that "the verdict which must be 

 pronounced in this case is decidedly unfavorable to the use of this preservative 

 in any quantity or for any period of time, and shows the desirability of avoid- 

 ing the addition of any form of sulphurous acid to products intended for 

 human food." 



Review of the literature of composition, analysis, and adulteration of 

 foods for the year 1906, A. J. J. Vandevelde {Separate from Bnl. Serv. 

 i<urveiU. Fabric, ct Com. Dcnrecs Aliment., 1907, pp. 129). — As in earlier pub- 

 lications of this series (E. S. R.. 18, p. 362), the subjects include general 

 articles, apparatus, watex', milk and cream, fats and oils, cheese, cereals and 

 cereal products, spices, sugar, sirup, etc., vinegar, fruits and vegetables, adul- 

 teration, and similar toi»i<'s. Bibliographical data in many cases are supple- 

 mented by short abstracts. 



ANIMAL PRODUCTION. 



Fodders and feeding stuffs, F. T. Siiutt {Canada Expf. Farms Rpts. 1906, 

 pp. lG-'i-17.')). — The feeding stuffs analyzed included oat middlings, oat 

 dust, oat feed, oatmeal, corn bran, gluten feed, glucose feed, rice meal, cotton- 

 seed meal, malt sprouts, molasses feeds, beet-root feed, crushed screenings, 

 mixed feeds, ground middlings, wild buckwheat, screenings from flax and wheat 

 (whole and ground), ground screenings mixed with barley, flax chaff, buck- 

 wheat chaff, fine broken stock, and wheat chaff". Analyses are also reported of 

 apple pomace, meat meals for poultry, frozen and unfrozen wheat straw and 

 chaff", and of a number of samples of mangels, turnii)s, carrots, and sugar beets. 



