1920] DAIRY FARMING- — DAIRYING. 73 



The superior vitality of tiie heu-ruised cliiclis is attributed in part to a 

 larger and more varied diet in early life. The high egg records and satisfac- 

 tory growth of lot 8 are held to indicate that " skim milk supplies some factor 

 other than lysin, the lack of which, we believe, limits the nutritive power of 

 the proteins in the grains fed to lot 6." Sexual development was retarded in 

 lot G but not to the extent of lot 2, where sexes were indistinguishable at 28 

 weeks. 



[Sources of protein feeds for poultry], H. Embleton (Oklahoma Sta. Rpt. 

 1919, pp. 50-52). — A brief report is made of some results secured in 1916-17 

 and 1917-18 from four pens of laying birds receiving, respectively, as part of 

 their rations meat scrap, cottonseed meal, peanut meal, and a mixture of the 

 latter two. 



The cottonseed meal pen laid the heaviest eggs (averaging 54.4 gm.) but the 

 fewest in number (106 per year). The eggs of the birds fed the mixed meals 

 were the lightest in weight (49.7 gm'.), but these birds averaged the most eggs 

 per hen (132 a year), with the meat-scrap pen a close second (131 eggs). The 

 peanut meal pen was intermediate with respect to size and number of eggs. 



The early elimination of surplus cockerels, R. C. Pun next {Jour. Bd. Agr. 

 [London], 25 (1919), No. 11, pp. 1319-1323, fig. i).— The author suggests the use 

 of known facts about sex-linked inheritance in poultry to distinguish betw-een 

 the sexes of chicks at hatching by inherited color differences. The method 

 would only be applicable where color varieties could be crossed, the cross-bred 

 pullets serving as egg producers but not as breeders. The cross-bred male 

 chicks would not be raised. 



Fluctuations in the egg market, A. V. D. Rintoul (Jour. Dept. Agr. Vic- 

 toria, 18 (1920), No. 2, pp. 113-116). — A general discussion, with a table show- 

 ing the wholesale price of eggs in Melbourne at semimonthly intervals from 

 January 1, 1907, to February 1, 1920. 



A relatively rare anomaly of the egg of the fowl, E. Bujakd (Arch. Set. 

 Phys. ct Nat. [Geneva], 4. ser., U (1911), No. 12, pp. 483-^86; also in Sac. 

 Phys. et Hist. Nat. Geneve, Compt. Raid., 34 (1917), pp. 69-72) .—Three cases of 

 ovum in ovo are described, and the approximately 50 similar cases recorded in 

 the literature since 1654 are classified according to the completeness of the in- 

 cluded egg (presence of yolk, shell, etc.) and other characteristics. The anomaly 

 is attributed to antiperistaltic movements of the oviduct. 



DAIRY FARMING— DAIRYING. 



Valuable bulletins and circulars for the dairy farmer and the manufac- 

 turer of dairy products, C. H. Eckles (Univ. Minn. Agr. Ext. Div. Spec. Circ. 

 2 (1919), pp. 4). — A selected bibliography of dairying and dairy farming, giv- 

 ng particular attention to publications of the U. S. Department of Agriculture 

 ind of the State experiment stations. 



Cassava meal as a feed for dairy cattle, L. A. Henke (Col. Hawaii Bui. 6 

 [1919), pp. 20, 21). — Cassava meal was used to replace entirely the corn and 

 roconut meal of the grain ration (ground corn, brewers' grain, coconut meal, 

 !:2:1, plus varied amounts of linseed meal) fed a Holstein cow giving about 

 50 lbs. of milk daily, and was also used as a partial substitute for the grain 

 nixture. The daily milk yield during three months of cassava feeding averaged 

 learly 2 lbs. greater than the yields during the month precetling and the month 

 oUowing this period, but the amount of grain consumed was also greater. The 

 assava meal proved very palatable. 



Testing of pure-bred dairy cows, W. M. Singleton (New Zeal. Jour. Agr., 

 '.0 (1920), No. 2, pp, 65-81, figs. 5).— This is a review of the operations of the 



