ANTMAT. PRODTTCTTON. 567 



[irolciii iif (litTcrcMil soi'ts varied (■oiisidi'rabl.v, (he rnllnwiiiu .miihuiuIs Iiciii^ ol)- 

 l.-iimil per led .u'lii. of the proteids studied: Ilcrriiii; •J.Sl per criit, liccf \.i\~> per 

 ci'iit. iiiacarnni I.TiS p(>r ceul, (\i,'j^ l.riC per cent, and milk d.Tl per <-enl. 



In a second test, milk, jjfniyere, and white cheese \ver(> compared, llie amount 

 of xantho uric bodies formed being greatest with tlie milk and Ic.ist willi the 

 white cheese. The effect of the quantity of protein eaten upon xantho uric- 

 acid excretion was also considered. 



The influence of climatic factors, muscular work, and baths upon the 

 excretion of water vapor through the skin, A. .1. Kai.mann {Arch. I'ln/xio]. 

 [Pfliigcr], 112 (IHOd), Ao. 11-12, pp. SGI-.')!)!), pis. 2. fig. 1). — From tests in 

 which muscujar work was a factor the conclusion' was reached that it caused 

 an increase in the amount of water vapor given off through the skin, \Nhich was 

 proportional to the char.-icter and amount of the work and especially to the tem- 

 perature of the surrounding air and the degree of moisture which it contained. 

 Cooling the skin resulted in a marked decrease in the anwiuiit oT water v.npor 

 given off through it. 



Fatigue, F. S. Li;i'; {./our. Aiiicr. Med. Assoc, //I) {IHOC). \o. 20, pp. I'/Hl- 

 l.'iOO. figs. .')). — A gemn-al discussion of the causes and relief of fatigue in which 

 much of tli(> literature of the subject is summarized. As the author points out 

 fatigue and recovery are phenomena of metabolism and only the assimilation 

 and detoxic.ntion of the fatigue .substances contained in the tissues " that 

 normally come with rest — and, best, rest with sleep — are capable of adequate 

 restoration of working power." 



Influence of age on the calcium content of the blood, C. DiiERii and G. L. 

 GiUMMi': (Voiiipt. Rcitd. »s'oe. Biol. [Paris], GO {WOG), No. 22, pp. 1022, 1023).— 

 In dogs, the proportion of calcium in the blood decreased regularly as age in- 

 creased. Witli rabbits tiie jiroportion varied gi-eatly with individuals of the 

 same age .-uid did not appear to be directly proportional to the age. Generally 

 speaking, tlie calcium content of rabbit blood was about doul)le that of dog 

 blood. 



The physiology of taste, W. Sternberg {Gcscliinacl- mid Gcruch-Phi/siolo- 

 gisclic I iil<rsiicliiui(/(ii iihcrdcn Gcschmacks.^inii. Berlin: J. Upringer. I'.WG. pp. 

 l.'>0: rer. in lirit. Med. Jour., I<)0G. No. 2393. p. 1309).— A sunnnary and dis- 

 cussion of avail;il)le <lata on the physiology of taste, methods of measuring taste, 

 and related (luestions. 



ANIMAL PRODUCTION. 



The feeding of farm stock, F. W. Taylor (Neir llnmpshire ffta. Bvl. 121, 

 pp. Isi-iOl). — The composition and digestibility of feeding stuffs, feeding 

 standards, palatability of rations, and related (pu>stious are discussi>d. tables 

 of composition are given, and the cimqmtation of rati(ms explained by examples. 



"The economic feeding of stock should he the feeder's primary object. 



"Economic feeding must go hand in hand with scientific feeding. 



"The principles of scientific feeding have been carefully worked out by skilled 

 investigators and feeders. 



"The application of these scientific j)rinciples is .a very sinqile process involv- 

 ing only the rules of common arithmetic. 



"Every farmer can and should apply these iirincii)Ies in his everyday 

 practice. 



"A careful study of tlie market prices on feeds .and :in inspection of th(>ir 

 guarantee tags will mciii money in pocket to the farmer." 



Steer feeding, .7. J. N'ernon and .7. M. Scott {New Me.rieo Nta. Bui. 51, pp. 

 13, pis. 2). — Ccmtinuing earlier work (E. S. R., 10, p. 189), the comparative 



