DAIKY I \ i:m l N< ; — DAIRYING — A.GROTECHNY. 1 1 "7 



cake poor in fat exerting more influence od the quantity of milk. The addition of oil 

 acts unfavorably on both the yield and the fat content of the milk which, however, 

 is not the case when the nil is present in the material in a natural Btate. Rape-seed 

 cake in comparison with palm-nut cake increased the yield of milk but had uo 

 influence on the fat content. Peanut cake increased the yield of milk and fat only 

 at tlif beginning of the feeding period. 



Suggestions for construction of a modern dairy burn / . S. Dept. Agr., Bur. 

 Anim. Indus. Circ.90,pp.6,Jigs.2).- It is the aim of this circular to present a plan 

 for a dairy barn embodying the best ideas in scientific and sanitary construction con- 

 sistent with practicability and cheapness. 



Dairying- at Park Royal, 1905, E. Mathews {Jour. Roy. Agr. Soc. England, 66 

 {1905), pp. 93-111) . — Tests of the butter and milk production of a number of cows 

 of different breeds exhibited at the shov of the Royal Agricultural Society in 1905 

 and several butter-making experiments are reported. The experimental work was 

 largely for the purpose of furnishing object lessons and consisted in making butter 

 from milk obtained after short and long periods of secretion, comparing butter made 

 from the milk of different breeds, churning at differenl temperatures, etc. 



Record of the station herd for 1904-5, J. L. Hills ( Vermont Sla. Rpt. 1906, 

 pp. 422-4 97). — Records of 52 cows for the year are reported. Some of the avei 

 results arc as follows: Yield of milk 5,343 lbs., fat contenl 5.25 per cent, total solids 

 14.7:; per cent, yield of butter 323.6 lbs., cosl of food 158.31, and proceeds from sale 

 of butter $.96.93. 



On the variations in the constituents of cows' milk during- the course of 

 lactation, F. Prachfeld (Tnaug. Diss., Univ. Leipzig, 1905; abs. in Milchw. Zentbl.,£ 

 {1906), No. 5, pp. 928, 929). The greatest variations in individual constituents 

 occurred during the second and third months and at the close of the lactation period. 

 Variations in fat, sugar, proteids, and ash decreased in the order mentioned. In 

 general, the percentages of fat, proteids, and ash in the milk increased and the per- 

 centage of sugar decreased from the beginning to thesecond or third month of the 

 lactation period, from which time on until the end of the period these relations were 

 reversed. 



Investigations on the relations of the properties of the blood (erythrocytes 

 and hemoglobin) to the productive capacity of milch cows, E. s in it/ 

 {Fuhling'8 Landw. Ztg., 55 {1906), No. 8, pp. 972-286).— The investigations, which 



were made with 3 dairy herds, consisted in counting the red bl I corpuscles and 



estimating the hemoglobin. 



The red blood counts were found to be influenced by the age of the cow-. Btage of 

 pregnancy, variations in altitude, and othercauses. Averaging the data for the cows 

 4 to 6 years of age and of moderate productive capacity, a blood counl of 6,320,000 

 erythrocytes per cubic millimeter was obtained for one herd, the production of w hich 

 was 2,400 kg. of milk containing 3.76 per cent of fat; 6,640,000 for another herd 

 producing 3,400 kg. of milk containing 3.08 per cent of fat : and 6,960,000 for a third 

 herd producing 4,000 kg. of milk containing 4.01 percent of fat, indicating a relation 

 between the yield of milk and fat and the number of red blood cells. 



The number of red blood cells showed a tendency to increase until the animals 

 reached the age of 4 to 6 years, after which there was a decrease. There was also a 

 decrease in the later stages of pregnancy. More dependence was placed upon the 

 blood counts than upon the hemoglobin estimations, lmt in general the two deter- 

 minations varied proportionately. With animals in advanced pregnancy and those 

 kept at high altitudes the hemoglobin was relatively increased, while with young 



animals and those very productive the proportion of he globin to red cells was 



reduced. A high content of hemoglobin and a high blood count are considered 

 favorable to milk secretion, and it is suggested thai these might be increased by 

 breeding. 



