DAIRY FARMING — DAIRYING. 173 



woro not rnnsidovod i)rnfUablo, ns tli(> oxtra return in Imttor was more Ihan 

 (•()ni])ensate(l by greater barrenness, a ln,i,'her deatb rate from tnlu'rculosis and 

 milk fever, and other causes. 



Dairy herd records, J. H. Grisdale, R. Robertson, and S. A. Bedkoro (Caii- 

 (1(1(1 IJ.rijt. Fdniis /,'/)^s•. 190.-,. pp. 51-61. 287. 2S8, 3 '/3).— Records are given of 35 

 cows at the central experiiiicntal farm, 22 cows at the experimental farm for 

 the Maritime Provinces, and in cows at the exj)erimental farm for Manitoba. 

 At the central experimental farm tests were made of the feeding value for cows 

 of a b.v-product from distilleries an<l of 2 cereal food by-products. A test was 

 also made of feeding refuse ajijiles to dairy cows, the results showing a slight 

 increase in the rate of milk jjroduction when apples wore fed as compared with 

 .M considerable decrease when apples were not fed. 



Dairy herd, G. II. True {Nevada f^ta. Rpt. 1905, -pp. .'i2-.'iJi). — Records of 7 

 cows for 1 year and 4 cows for short periods are reported. 



Story of Rose and Queen, W. J. Fraser, {Illinois Sta. Circ. 103. pp. .'/, figs. 2). — 

 The first cow mentioned produced on an average for 10 years 384 lbs. of butter 

 tat i)er year at an annual profit of .$.56, while the second cow produced only 1.52 

 lbs. of butter fat i»er year for G years at an aniuial loss of .$2. These two records 

 are discussed with reference to conditions prevailing among dairy herds in Illi- 

 nois. 



On the fat content of milk and its variations, E. TTjhelyi {Milchir. Zcnihh, 

 2 {1906), xVo. 7, pp. 30,i-31.i) .—The data collected by the author show that the 

 milk produced in Hungary contains on an average aljout ."J.S per cent of fat. 

 That feeding has no practical influence upon the percentage of fat in milk is 

 considered as shown by the similarity in the milk from small farms and large 

 estates. A monthly or seasonal variation in the fat content of milk is attributed 

 to the stage of lactation. The poorest milk was obtained in March and April 

 and the richest in October, November, or December. 



Some causes affecting the profits of dairying, F. S. Cooley {Mass. Crop 

 h'l>f.. 19 {1906). \<j. 2, pp. 28-36). — The subjects discussed include the kind of 

 cows kept, the manner of replacing cows in dairy herds, the use of condimental 

 feeding stuffs, causes of variation in the quality of milk, and the value of milk- 

 test associations. Experimental evidence is cited in support of the views pre- 

 sented. Tlie general use of condimental feeds is stated as acting adversely on 

 the profifs of the dairy. 



Contribution to the study of the soluble proteids of milk, Lindet and L. 

 A.M.MANN {Rev. Gen. Lait, 5 {1906), No. 16, pp. 361-311). — According to the 

 iiuthors, milk contains a soluble compound of casein and calcium phospliate 

 designated calciinn phosphocaseinate. Rerniet, salts, alcohol, and acetic acid 

 precipitated only a part of this compound, which is accordingly believed to 

 exist in milk in solution as well as in a colloidal state. 



Milk therefore contains 2 soluble albuminoids, albumin liaving a rotary power 

 of —30° and calcium phosphocaseinate having a rotar.v power of — 116°. The 

 rotary power of the total albuminoids in the samples of milk examined varied 

 lietween — 62 and — 74°. Based upon this difference in rotary power a method 

 for determining ap])roximately the quantity of albumin in milk is suggested and 

 fhe results of a number of determinations are reported. 



The authors attem])t to refute the theory of Ilannnarsten that under the 

 influence of rennet casein is transformed into paracasein insoluble in the i)res- 

 ence of calcium salts and a sohilile proteid representing about 10 per cent of the 

 total nitrogenous material, on the grounds that the serum obtained by curdling 

 milk with rennet contains less albuminoid matter than serum obtained by fil- 

 tration through kaolin, and moreover, that the rotary power of the proteids not 

 8989— No. 2—06 G 



