1014 



EXPERIMENT STATION RECORD. 



the Annual Eeports of the station for 1891 and 1892 (E. S. E., 4, p. 255; 

 6, p. 68). The record includes 26 cows of the following breeds: Ayr- 

 shire, Jersey, American Holderness, Guernsey, Devon, Holstein, and 

 Shorthorn. It covers for some of the cows a part of the first period of 

 lactation, for others parts of the second and third periods, and for 2 

 cows parts of the third and fourth periods. The data given show for 

 each cow the date of calving, and kinds and amounts of food eaten, the 

 food ingredients eaten, the yield and comiiosition of milk, yield of milk 

 constituents, and general averages for each month of lactati(m; the 

 relation of fat in the food to fat in the milk in each period of lactation, 

 the cost of production of milk and fat, the percentage variation by 

 months in food and milk constituents, comparisons of successive i)eriods 

 of lactation, and the relative size and number of globules in the milk of 

 each breed in the different periods of lactation; and analyses of mixed 

 hay, corn silage, corn fodder, alfalfa fodder, sorghum fodder, rye fod- 

 der, oat and pea fodder, beets, mixed grain, wheat bran, and oats fed 

 in the trial. 



Owing to the different periods of lactation in which the cows were, 

 it is impracticable to give any concise statement of the results for the 

 period covered which would not be misleading. The only discussion 

 of the results in the report is with reference to the source of the fat in 

 milk (see p. 1011). 



Cotton-seed feed for dairy cows, H. P. Armsby and E. H. Hess 

 {Pennsylvania Sta. Bui. 28, pp. 22). — " Quite recently there has been 

 brought before the farmers of this State what is designated as 'cotton- 

 seed feed,' which purports to be a mixture of 5 parts of the hulls with 

 1 of cotton-seed meal by weight. The result is a very bulky feed, 

 weighing about 13 lbs. j)er bushel, which is offered at the price of 

 $11.50 per ton in bulk in car lots at any point in Pennsylvania." 



Analyses of 4 samples of this material and the computed composi- 

 tion of a mixture of 1 part of cotton-seed meal to 5 jjarts of hulls are 

 given, as follows: 



Composition of cotton-seed feed. 



Constituents. 



Water 



Ash 



Albuminoids ? tj j^„-„ 



Kon-olbM.,nuoid8P'^''t"'i 



Orndti liber 



Nitroiieu-ftee extract 



Fat 



Total 



Com- 

 puted 

 1 to5. 



Per cent. 

 13.07 

 3.28 



10. 05^ 



36.61 



33.22 



3.17 



100. 00 



Sample 



Ko. 

 U510. 



Per cent. 

 13. 07 

 2.45 

 6.92 



.88 



43.28 



30.67 



2.73 



100. 00 



Sample 



No. 

 15966. 



Per cent. 



13.07 



3.39 



9.51 



.75 



33. 12 



36.77 



3.39 



100. 00 



.Sample 



No. 



16034. 



Per cent. 



13.07 



2.55 



7.21 



1.22 



32.54 



40.60 



2.75 



100. 00 



Sample 



No. 



16562. 



Per cent. 

 13.07 

 2.92 

 10. 25 

 .40 

 34.31 

 36.01 

 3.04 



100. 00 



The cost of amixtuie of 1 part of cotton-seed meal to 5 parts of 

 hulls is reckoned at $10.42 per ton, plus the cost of mixing. 



The digestibility of cotton-seed feed was determined in an experi- 

 ment with 3 steers. This material was fed alone from March 23 to 



