ANTMAI. PRODUCTION. 863 



not be sold to feeders who ;i|i|il.\ .-i iMir knowledt^e i»r the ;irt of feodius stock 

 and business methods to the hu\ iir^ <il' their feed." 



The buyer should stu<l.v the in.irUet pv'ire and coMiiinsitidn of connnercial 

 feeds and make his selection aicordini^ly. 



•Cotton and linseed meals, the jrhiten and wheat feeds, distillery and brew- 

 ers' <j;rains. and a few other standard thinj;s supply digestible protein at reason- 

 able i)riees. The.v are all that any feeder needs to snp])lement and balance 

 the hay. silage, stover, and corn meal which his farm produces. They are the 

 onl.v commercial feeds which will sui)i)len!ent tliem. It is absolutel.y impos- 

 sible to balance the feed which the farm i»roduces with boughten feed con- 

 taining less than l.'i per cent of protein, which is more than many of these 

 commercial feeds contain. On a well-managed farm there is no need to buy 

 st:ircliy feeds nfir a single o.il hull nor any chaff." 



The substituting value of different feeding stuffs, L. Duci.ert (Bui. Metis. 

 Off. h'ctisei<j. Agr. [Paris \. J (JDOO), Xo. 12, pp. lJ,SS-lJ,l).'i). — The author has 

 calculated and arranged in tabular form data which show amoimts of dif- 

 ferent feeding stuffs eciuivalent in nutritive value, with sp(>cial reference to 

 the feeding of horses and ruminants. 



Feeding cellulose and coarse fodders to herbivorous animals, V. P. 

 I'sTiANTZKv (O I'Udnil Tniroi/adiniikJi Zhlrotnuikh Kh/etvliatko'i I Gliru- 

 hiiiiitl Konnami. Kiev: li)0(i. pp. 17/ + i7.'/). — Experiments with sheep and 

 rabbits were undertaken to determine the feeding value of wheat straw 

 bi'foi'c and after a treatment which would remove a greater or less amount 

 of the iiicrnsting material present. In some of the experiments with rabbits 

 the respiratory products were taken into account, a Pashutin respiration cal- 

 orimeter being used. 



According to the author's snnunary, winter wheat straw when fed to sheep 

 has a low nutritive value, and when fed to rabbits its value is negative. On 

 the other hand, cellulose from the same straw freed from incrusting substances 

 has a decided food value and is equal to isodynamic quantities of starch and 

 sugar as protectors of protein and fat. When fed to either rabbits or sheep, 

 it is almost completely digested. Even if the incrusting substances are only 

 partially removed the value of the coarse fodder is decidedly increased, but 

 the maximum effect is not obtained unless the fodder is entirely freed from 

 sue); constituents. — r. mkima.n. 



Investigations on the protein sparing action of asparagin, M. Muller 

 (Arcli. I'liysiol. \l'tlii;i<r\. 11. > {IHdil). \<>. .',-(j, pp. .>',:,^2U1, pis. ,}). — Experi- 

 ments with bacteria from the paunch of ruminants showed th.-it they select 

 jisparagin in preference to protein as nutritive material. The author concludes, 

 therefore, that asparagin serves as :\ ])rotector to protein and that these bac- 

 teria have the power to synthesize nitrogenous bodies of higher molecular struc- 

 ture from asparagin and from ammonium tartrate. The bodies formed give the 

 same reactions .as pei)tone and pure albumen. The author believes that the 

 results noted in vitro are applicable to the animal body. 



New experiments on the source of hippuric acid in the animal body, 

 II. \'a.siliu (Mitt. Laiidir. Jii.'it. JSrc.staii. J {lUdti), Xo. .',, pp. S.iU-SlJU). — 

 According to the author's hivestigations. benzoic .-uid derived from plant pro- 

 teids by oxidation is to be regarded as the source of hii)puric acid in the animal 

 body. The leaves and fruits contain a larger proportion of the mother sub- 

 stance than stems and roots, and the older the plant the smaller the amount in 

 leaves, stems, and roots. The mother substance is inversely proportional to the 

 crude fiber and pentosan content and directly proportional to the protein content. 



Incrusting substance.s, such as lignin, can not be regarded as the principal 



