678 EXPERIMENT STATION RECORD. 



Trout culture for farmers, W. E. ]\Ieehax {Pennsylvania Dipt. Agr. lipt. 1899, 

 pt. 1, pp. 312-323). — Raising trout is recommended as a profitable enterprise for 

 farmers, and directions are given. 



Trade in agricultural commodities — animals for slaughter and meat prod- 

 ucts, A. DuLAC {A>in. Agron., 26 {1900), No. 9, pp. 430-472). — A comprehensive 

 article on the commercial side of animal husbandry, with special reference to ani- 

 mals bred for slaughter. 



DAIRY FARMING— DAIRYING. 



Corn silage, sugar beets, and mangels — a comparison of their 

 value as dairy foods, H. J. Waters and E. H. Hess {PeiDiaylvania 

 Sta. B^jt. 1899^ pp. 111-123). — A feeding experiment with 3 lots of 3 

 cows each and covering 3 thirty-day periods is reported. During 

 the entire test all the cows were fed daily 7 lbs. of mixed grain and 6 

 lbs. of field-cured corn stover. During periods 1 and 3 all the cows 

 received in addition silage, sugar beets, and mangels, each in quanti- 

 ties furnishing 2 lbs. of digestible dry matter. During period 2, in 

 addition to the grain and stover, lot 1 received 6 lbs. of digestible dry 

 matter in silage; lot 2, 6 lbs. in sugar beets; and lot 3, 6 lbs. in man- 

 gels. The results of the test showed a slight increase in the amount 

 of butter, and percentages of fat and solids-not-fat in changing from 

 the mixed ration of silage, sugar beets, and mangels to silage alone, 

 and a slight decrease in changing from the mixed ration to either sugar 

 beets or mangels alone. They are considered, however, as showing 

 no practical difference in the effect of silage and roots upon the yield 

 and quality of milk, but the mixture of silage and roots is considered 

 slightly better than the same quantity of either fed separately. 



A brief summary is given of previous experiments at the station 

 along this line (E. S. R., 3, p. 718; 6, p. 446; 7, p. 976). 



Rye meal and Quaker-oats feed for milk production, H. Hay- 

 ward {Pennsylvania Sta. Bui. 52, pp. S). — An experiment covering 3 

 periods of 35 days each was conducted with 9 cows to compare Quaker- 

 oat feed and rye meal as feeding stuff's for milch cows. The cows were 

 divided into 3 lots. All 3 lots during the first and third periods andl 

 cow in each lot during the second period were fed a control ration 

 made up of 2i lbs. of cotton-seed meal, ?>\ lbs of corn meal, 2 lbs. 

 of new process linseed meal, and timothy hay ad Uhliuin. Dur- 

 ing the second period the corn meal was replaced, respectively, l)y the 

 same quantity of Quaker-oat feed and rye meal, and these contrasted 

 rations were each fed to 1 cow in eafh lot. Variations in the live weight 

 of the animals were .small. The average cost per pound of milk and 

 fat was highest on the rye-meal ration and lowest on the corn-meal 

 ration. 



"Rye meal, fed as part of a properly balanced ration, did not materially decrease 

 the flow of milk, but was nearly if not quite as efficient as a.n equal weight of corn 



