1920] ANIMAL PRODUCTION. 775 



The two price sche<luU>s dificr in tlie charge for grain. Average Mllwauliee 

 prices (corn, $1.38; barley, 92 cts. a bushel) were used for the "purcha.se" 

 price and the " farm " price was taken as 10 cts. lower for corn and 8 cts. 

 lower for barley. A charge of 5 cts. a bushel was added for grinding barley. 

 The prices per ton of the purchased supplements were: Tankage, $110; shorts 

 (standard middlings), $44; and linseed meal, $67.50. Half the farm price of a 

 bushel of com was taken as the price of 100 lbs. of skim milk. Whey was 

 charged at half the price of skim milk. 



The outstanding feature of the experiment, in the authors' opinion, was the 

 marked success with barley and whey, a ration low in protein. Dry ground 

 barh'y is •considered an excellent substitute for corn in swine fattening. 



Soft pork studies, J. M. Scott (Florida Sta. Bui. 157 {1920), pp. 67-75).— 

 This is mainly an announcement of the successful sampling of the fat of liv- 

 ing hogs in order to determine the changes in melting point during the progress 

 of a feeding experiment. The fat is removed from a 2-in. incision in the ham 

 and the opening is closed with a few stitches. The site of the incision is dis- 

 infected before and after the operation. This procedure was found not to inter- 

 fere with growth. 



The protocol of a preliminary experiment is presented to Illustrate the uses 

 of the method. Nine hogs were fed during two 44-day periods and the initial 

 melting points varied from 35.5 to 40.5° C. The three hogs with fat of highest 

 melting point received peanuts alone during the first period and a mixture of 

 corn, shorts, peanut feed, and skim milk during the .second period. By the 

 end of the first period the melting points had declined about 4°, and at the end 

 of the second period they had returned almost to their original state. The 

 three hogs with fat of the lowest melting points received a mixed feed through- 

 out and the melting points steadily increased. Of the remaining hogs, two 

 showed decrease in melting points during the second feeding when on peanuts 

 alone, and one showed increase. The detection of individual idiosyncrasies of 

 this sort is considered one of the advantages of the sampling method. 



[Feeding records of Canadian horses] (Cauadfi Expt. Farms Rpt. 1919, pp. 

 106, 107, 112, US). — The year's feeding records of a Percheron colt and a 

 Percheron filly at Ste. Anne de la Pocatiere, Que., are recorded by J. Begin 

 (pp. 106, 107). These are continuations of the records noted in the preceding 

 report (E. S. R., 41, p. 570). 



Feeding records at Cap Rouge, Que., Experimental Station are reported by 

 G. A. Langelier (pp. 112, 113). They include a colt and 4 fillies up to the 

 age at which they were broken to harness and also the records of 2 working 

 horses. 



Feeding vpork horses on corn silage, R. H. Wilxiams and W. S. Cunning- 

 ham {Arizona Sta. Rpt. 1918, pp. 328, 329).— It is reported that horses at the 

 Prescott dry farm consumed from 32.5 to 122.5 lbs. of corn silage per head 

 daily during the summer. The average daily consumption was nearly 75 lbs. 

 per head. No injurious results were noted. 



Oat straw as winter roughness for farm work horses, E. A. Trowbridge 

 {Missouri Sta. Bui. 172 {1920), pp. 15, 16, figs. 2).— Twelve horses doing winter 

 farm work were maintained for 70 days in satisfactory condition on oat straw 

 and a grain ration composed of corn, oats, and bran (2:2:1) plus a little linseed 

 meal. 



Marine algae as feed for work horses, Lapicqtte and Brocq-Roussetj 

 {Compt. Rend. Acad. Sd. [Paris], 170 {1920), No. 26, pp. 1601-1603).— Laminaria 

 flexicaulis, a seed weed, was found to be a satisfactory substitute for oats in 

 horse feeding. Much of the salt was removed before xise. 



