368 EXPEEIMENT STATION RECORD. 



for 25 days, after which the lots were reversed for 20 days. In both groups 

 the greatest yield of milk was obtained with the oil cake. From this it is 

 concluded that " it is comparatively easy to force the yield of milk by the use 

 of protein at the expense of the fat contained in the body, when the cows are 

 in good condition, while it is diflicult to do so with carbohydrates at the expense 

 of the protein-containing tissues of the body." 



It is suggested that as long as the lucera is young, that is, up to about 

 June 15, it may be supplemented by mangolds (or if necessary cereals, etc.). 

 From June 15 to about August 15 the lucem, being older, may be fed with oil 

 cake, or, if it is fed in smaller rations, with oil cake and cereals, etc. From 

 August 15 to about September 10 it should be supplemented by oil cake and 

 mangolds. 



Manuring for milk (Midland Agr. and Dairy Col., Manuring for Milk 1913, 

 pp. 12, pi. 1, fig. 1). — In these experiments, which covered a period of four 

 years, pastures composed principally of cocksfoot, tall fescue, and white clover 

 were fertilized with superphosphate and sulphate of potash, and the yield in 

 milk compared with pastures not so fertilized. A total of 373 gal. more milk 

 per acre was obtained during the four years on the fertilized pastures, and 

 their carrying capacity and profits were increased. 



Cost of production of milk, A. Murray (Midland Agr. and Dairy Col., 

 Prelim. Rpt. Cost Milk Prod. 1913, pp. 10). — From his irplinnnary investiga- 

 tions on this subject, the author concludes that the chief iactcr contributing to 

 the high production cost of milk is the excessive use of concentrates, and next 

 to that the excessive use of long hay. Where roots are liberally fed the cost 

 of production is proportionately decreased. 



New method of calculating' the production value of feedstuffs for dairy 

 cattle, G. FiNGEELiNG (Fiihling's Landw. Ztg., 63 (1914), No. 6, pp. 185-189).— 

 The author takes exceptions to Hansson's proposal (E. S. R., 31, p. 371), that 

 Kellner's protein factor of 0.94 be increased in estimating the production value 

 of feeding stuffs for dairy cattle. It is contended that milk production depends 

 largely upon fat and carbohydrate elements rather than protein, and that since 

 Kellner's figure represents production value for body growth it is also suited 

 to milk production. Also, since the utilization of protein by the dairy cow will 

 depend upon the lactation period and the producing capacity of the animal, 

 the protein figure will be variable. The author prefers a feed standard on a 

 safe basis and believes that for practical use the Kellner estimates are the best 



A new record milk yield (Breeder's Gaz., 66 (19U), No. 22, pp. 910, 912).— 

 It is reported that in a semiofficial test, completed November 13, 1914, the 

 5-year-old Holstein-Friesian cow Tilly Alcartra, owned by a California firm, 

 finished the year with 30,452.6 lbs. of milk and 951.3 lbs. of milk fat to her 

 credit, and is believed to be the only 30,000-pound milch cow in the world. 

 During the year she consumed a total of 1,828 lbs. each of barley, oats, and 

 bran, 1,208 lbs. oil meal, 681* lbs. dried beet pulp, 3,226 lbs. corn silage, 10,122 

 lbs. hay, and 15,140 lbs. mangels, which at market prices is estimated to have 

 cost $149.88. 



Segregation of fat factors in milk production, F. B. Hills and E. N. 

 BoLAND (Proc. Iowa Acad. Set., 20 (1913), pp. 195-198). — In a microscopical 

 study of a large number of samples of milk, the authors divided the globules 

 into three classes, as regards size, all under 0.0016 mm. in diameter being in 

 the first class, those ranging from 0.0016 to 0.0032 mm. in the second class, and 

 all over 0.0032 mm. in the third class. Numerous counts of the globules were 

 made in samples of milk ranging in fat content from 2.8 to 7.2 per cent. 



