774 



EXPERIMENT STATION EECORD. 



with cattle, fowls, and the liiimau species are cited iu siipport (jf the theory 

 that sex is deiieudeut ui)oa the condition of the ovum at the time of fertilization. 

 On the determination of the secondary sexual characters in Gallinaceae, 

 A. PiizABD {Compt. Rend. Acad. ScL [Pariis], 133 (I'.Hl), Xo. ,.'/, pp. 1021- 

 1029, figs. 2). — The author reports changes iu plumage and other character- 

 istics induced by castration of Orpington fowls and golden and silver pheasants. 



DAIRY FARMING— DAIRYING. 



Balanced rations for dairy stock, J. B. Lindsey (Masfiuchufictfs Sta. Circ. 

 30, pp. 7). — This information has been prepared, iu cooperation with the State 

 Board of Agriculture, to furnish information to practical dairymen on the com- 

 position and digestibility of cattle feeds, combining coarse and concentrated 

 feeds, and types of balanced rations for milch cows and young stock. 



The influence of calving time, length of dry period, and age upon milk 

 production, Spann (Dcut. Laiidw. Tlcrziu-lit, 16 {11)12), A'o. 2, pp. 16-lS). — The 

 average yearly milk production of 3.000 cows of the Algau breed w-as 3,1.30 kg., 

 containing 3.643 per cent of fat. Those cows calving from November to Decem- 

 ber, inclusive, averaged 3.193 kg. of milk per year, while those calving at other 

 seasons averaged 3,031 kg. per year. The fat content decreased as the cows 

 grew older, and a high percent;ige of fat was not correlated with a low yield 

 of milk. Other results are shown in the following table: 



Correlation Iciwccn lenyth of dry period and of tmeeessivc lavtution periods 



and the yield of milk. 



[Milk yields of cows in Trinidad], H. S. Shrewsbury (Dcpt. Ayr. Trinidad 

 and Tohago Bill, 10 (1011), Xo. 69, pp. 220-22 J, ).—M\\k yields are reported of 

 pure-bred Holsteius and Guernseys, and grade zebus. Red Polls, Guernseys, aii<l 

 Shorthorns. 



Valuation of milk, E. Petersson (MolJc. Ztg. Berlin, 22 (1912), Nos. 5, pp. 

 51, 52; 6, pp. 62-64)- — The various tests for judging milk are described, and 

 alsio some methods of paying for milk according to its quality as shown by 

 these tests. These include the fat content, dirt, bacterial counts, and other 

 properties thnt may affect its value. 



Accounts for a dairy farm, C. S. Phelps {Country Gent., 76 {1911), No. 

 3010, p. 6). — A method of keeping records and distributing the cost of pro- 

 duction on a dairy farm. 



Contribution to the anatomy and physiology of the mammary glands of 

 cattle, S. G. Zwart {Beitrdge zur Anatomie und Physiologie der Milch drilse 

 des Rindes. Inaug. nis.t., Univ. Bern, 1911, pp. 9,'>, pi. 1). — By inserting a 

 U-shaped tube into the teat the pressure of milk within the mammary gland was 

 determined. 



