770 



EXPERIMENT STATION RECORD. 



[Vol. 41 



reported by the authors, about 55 per cent of the available energy would have 

 been utilized. Compared with the author's average of about 53 per cent, " this 

 is a remarkably close agreement, and is an experimental verification of the 

 work done by Armsby in his calorimeter." 



Supplementary feeds in fattening lambs, H. J. Gramlich {Nebi'aska Sta. 

 Bui. 173 {1919). pp. 21t, pgs. 8). — A feeding experiment beginning December 30, 

 1915, with 308 Wyoming lambs divided into 11 lots is reported. A preliminary 

 account of certain results has been noted (E. S. R., 38, p. 271). In one lot 

 (lot 8) the lambs received com and linseed meal in a self-feeder, were allowed 

 all the prairie hay they would eat, and were marketed in 40 days. The other 

 lots were all hand fed, received alfalfa hay ad Ubitum, and were marketed in 

 75 days, all at the same selling price. Three lots were used in testing heavy, 

 medium, and light corn feeding without other concentrates, and 3 in com- 

 paring linseed meal, cottonseed meal, and cold-pressed cottonseed cake when 

 fed in definite amounts with .'^uch corn and alfalfa as would be consumed. The 

 main results from these 6 lots are tabulated below. 



Lamb feedino, 1915-16. 



^'alue of limiting corn rations and comparison of 

 supplements. 



Shelled corn was charged at 60 cts. per bushel and alfalfa hay at $8.50 a ton. 

 The price per ton charged for linseed meal was $40, for cottonseed meal $35, 

 and for cold-pressed cake $29. The relative profits are influenced slightly by 

 the fact that the initial costs for lambs varied from lot to lot. 



It is pointed out that a medium corn ration under the conditions was more 

 economical than a heavy or a light ration. 



With regard to the supplements, it is estimated that $53 could have been 

 paid for linseed meal, $55 for cottonseed meal, and $41.50 for cottonseed cake 

 without reducing the profits from lots 5, 6, and 7, below the lot 1 profit. 



Lot 4, in addition to alfalfa and a full feed of shelled corn, was given a 

 daily corn-silage ration which was gradually reduced from 2 lbs. per head at 

 the beginning to 0.5 lb. at the end of the test. The average dally gain was 

 0.388 lb. The silage consumed per pound of gain was 3.93 lbs., this amount 

 replacing 0.74 lb. of the corn and 1.4 lb. of the alfalfa required by lot 1 for 

 a pound of gain. With silage at $4 a ton, the cost of gain was 4.95 cts. a 

 pound and the profit per lamb $2.52. 



Lot 9 was treated like lot 1 except that hominy feed was substituted for 

 corn. To make a pound of gain these lambs required 3.57 lbs. of hominy 

 feed and 3.01 lbs. of alfalfa, at a cost of 5.78 cents, with hominy feed at $25 

 a ton. The daily gain was 0.36 lb. per head and the profit about equal to 

 that of lot 1. It is pointed out tliat with hominy feed and corn priced the 

 same, the former woiild have been distinctly more profitable. 



