ANIMAL PRODUCTION. 577 



at all. In many cases, however, the raising of sheep is itsejf a by-product of 

 general farming. Here there at once arises before us a most intricate mass of 

 interdependent factors, all of which should be taken into account by the farmer 

 iu determining the size of his flock." 



Experiments in feeding' raw pptatoes and potato products to swine, 

 E. Haselhoff {FUhling's Landiv. Ztg., 59 (1910), No. 10, pp. 329-3. 'il).— Figs 

 weighing about 54 kg. each were fed a basal ration of skim milk, ground maize, 

 wheat bran, and sesame cake for 84 days. The lot receiving a supplementary 

 ration of raw potatoes made an average daily gain of 0.G5G kg. per head, at a cost 

 of 0.7725 marks per kilogram (about 8.4 cents per pound). The corresponding 

 gain on a supplementary ration of dried potato chips was 0.6GS8 kg., at a cost 

 of 0.8895 marks per kilogram. On a supplementary ration of raw potatoes and 

 potato chips, which had been treated with diastase so that a portion of the 

 starch had been changed to sugar, the gain was 0.703 kg. per head a day. at 

 a cost of 0.7890 marks per kilogram. On a repetition of the experiment, the 

 corresponding values on raw potatoes were 0.508 kg. at a cost of 0.9124 marks 

 per kilogram ; on dried potato chips, 0.541 kg. at a cost of 0.9549 marks ; and on 

 potato and sugar flakes, 0.583 kg. at a cost of 0.8935 marks. 



Hog raising in North Carolina, R. S. Curtis (North Carolina Sta. Bui. 207, 

 pp. 133-18^, figs. 12). — This bulletin on the breeding, feeding, and management 

 of swine was prepared in response to numerous inquiries regarding the possi- 

 bilities for swine raising in North Carolina. The natural advantages of the 

 State for swine growing are discussed. It is pointed out that the hog is nat- 

 urally a grazing animal, and that consequently for successful swine production 

 forage crops should be grown. The date and rate of sowing, and approximate 

 period of grazing, for the various forage crops are presented in tabular form. 

 Several types of hog houses are illustrated and described. The common ail- 

 ments of swine are discussed from the standpoint of prevention rather than 

 cure. 



Swine husbandry and bacon curing, L. M. Douglas (Trans. Highland and 

 Agr. 8oc. Scot., 5. ser., 22 (1910), pp. 107-117).— A statistical article in which 

 it is shown that there is a shortage of pigs for bacon-curing purposes throughout 

 the world. Attention is called to the opportunities for pig breeding and bacon 

 curing in the United Kingdom. 



Decorticated peanut cake for feeding horses, J. E. Lucas (Rev. Gen. Agron., 

 n. ser., 5 (1910), No. 5, pp. 225-229) .—When the bran and alfalfa in a ration 

 for horses were replaced by peanut cake, straw, and a small quantity of 

 molasses, the cost of the ration was reduced about 10 per cent, yet it gave 

 fairly good results. 



Feeding sugar to horses to increase working capacity, Bartiiel (Ztschr. 

 Veterindrk., 22 (1910), Nos. 5, pp. 210-226; 6, pp. 265-278).— The author reviews 

 the experimental work which has been done on this topic and contributes his 

 own experience. Although more expensive than many other feeding stuffs, he 

 considers sugar a valuable food for increasing the working capacity. The lit- 

 erature on the subject is appended. 



Experimental demonstration of the mechanism of extension and inflection 

 in the horse, Zwaenepoel (Ann. M6d. V6t., 59 (1910), No. 6, pp. 322-331,, figs. 

 6). — A description of a mechanical contrivance designed to illustrate the dy- 

 namics of locomotion in quadrupeds is given. 



The schooling of horses, J. Swire (Live Stock Jour. [London], 72 (1910), 

 No. 1891, pp. 7, 8).— A comparison of the English and French methods of train- 

 ing cavalry horses in riding-school work, in the steeplechase, iu long-distance 

 rides, and in jumping competitions. 



