326 EXPERIMENT STATION RECORD. 



The av<'ra,m^ melting point of tlie kidney fat is 46.3° C. for the steers 

 fed corn and 50. t^ for those fed cottou-seed products — a diftereuce of 

 4°, The average melting point of the caul fiit is 40.5° on corn and 49.7° 

 on cotton-seed products — a difference of over 3°. The average melting 

 point of thebody fat is 30.0° on corn and 45.<»o on cotton seed products — 

 a dift'erence of nearly 9°. 



"The results of the iodiu absorption arc, however, disappointing. There is no 

 regularity; but, if anything, the effect of the seed and meal seems rather to lower 

 the iodin absorption. With Beechi's test, however, which by some is considered a 

 distinctive test for cotton oil, the fats from the steers fed on [cotton-seed] meal or 

 seed gave decided reactions. . . . 



'"Thebody fat is always considerably lower in melting-point tlian either the kidney 

 or caul fat, while the lustduble acids in the body fat run considerably higher. . . . 



''Oleomargarine, or more properly l)utterine, made from beef tallow derived from 

 steers fed on cotton-seed meal and hulls, might give Beechi's test, confusing ordinary 

 chemical tests for pure butter." 



Feeding experiments -with milch co^vs, J. B. Lindsey [Massa- 

 chusetts State Sta. Bpt. 1893, ])p. 15-45). 



/Synopsis. — This includes 2 experiments, the first made to compare hay, rowen, corn 

 stover, hay of peas and oats, and. silage made from mixtures of corn and soja 

 beans; and the second to compare rowen, green vetch and oats, and green corn 

 fodder for milk production. These lirought out anew the economj of substi- 

 tuting some other coarse fodder for meadow hay. A silage made of a mixture 

 of equal parts of green corn fodder and green soja bean was found to be equal 

 to hay for milk production and much more economical. Milk was produced 

 cheaper on green vetch and oats than on green corn fodder. 



General feediiuf experiments icith milch cows (pp. 15-35), — Ten cows, 

 mostly grades in different stages of the milking period, were used. 

 The experiment lasted from October, 1892, to July, 1893. and was 

 divided into 7 periods. The grain ration remained constant through- 

 out the entire experiment, and consisted of 3 lbs. each of wheat bran, 

 Buffalo gluten feed, and cotton-seed meal. The coarse fodders were 

 fed ad libitum, and were different for each period, as shown by the 

 following: 



Period 1, hay, about 15 lbs. 



Period 2, hay and Globe mangel-wurzels, about 15 lbs. each. 



Period 3, corn stover, from 12 to 14 llts. per day. 



Period 4, hay, about 4 ll»s., and 50 lbs. of coru-and-soja-ljean silage. 



Period 5, hay, 4 lbs., and about 50 lbs. of soja-bean-and-coru silage. 



I'eriod 6, hay of peas and oats, about 15 lbs. per day. 



Period 7, rowen hay. It! to 18 lbs. per day. 



The silage fed in the fourth period (corn-and-sqja-bean silage) con. 

 sisted of equal parts, by weight, of green corn fodder and green soja 

 bean, and that fed in the lifth period (soja-beau-and-corn silage) consisted 

 of 2 parts, by weight, of green soja bean and 1 part of green corn fodder. 

 Samples of the milk of each cow were at first taken daily, but later 

 composite sami)les were made of the milk for 3 days of each week, 

 and analyzed. The record of each cow is giveu, including the amounts 



