1116 EXPERIMENT STATION RECORD. 



corn meal and linseed-oil' meal 5:1. The gain on corn meal, linseed-oil meal, and 

 gluten feed 10: 1: 1 was also large, being 1.574 lbs. per bead per day. In the rase of 



all the lots the grain eaten per pound of gain ranged from 3.77 lbs. with lot 1 on corn 

 meal and linseed-oil meal, 5: 1 to 9.45 lbs. with lot 8 on corn-and-eob meal. 



When the animals were sold and slaughtered data were recorded regarding the loss 

 in weight in dressing; the weight of head, leaf, and facings; price received, etc. 

 With the lots fed in the spring the dressed weight ranged from 76.5 per cent of the 

 live weight with lot 7 fed corn meal and wheat bran, 4: 1 to 84.3 per cent with lot 

 10 fed soaked whole corn. With the lots fed in the summer and autumn it averaged 

 about 82 per cent. The principal conclusions follow: 



"The nutritive ratio alone does not determine the economy with which the nutri- 

 ents will be used. A ration which is poor in protein, but is palatable, digestible, and 

 concentrated may be greatly more efficient and profitable than a balanced ration 

 not possessing these characteristics. Palatability may in a measure compensate for 

 a lack of protein. 



" Hogs fed on corn and linseed-oil meal ate more feed, made greater increase in 

 weight, with a smaller amount both of food and of digestible nutriment and at less 

 expense than with any other grain ration tested in these dry-lot feeding experiments 

 [the balanced ration of corn and oil meal being the most efficient and profitable of 

 the rations tested]. The quality of the pork produced was unsurpassed and the 

 tendency of these feeds to make real growth, as well as fat, was greater than that of 

 any other ration tested. One pound of oil meal replaced from 3.85 to 7.1 pounds of 

 corn, according as it was fed with five or twenty pounds of corn. 



"Bone meal fed with whole corn effected a marked saving in the grain require- 

 ments per pound of gain. Oats were not as satisfactory as other supplements used. 



"All of the supplements used with corn except oats reduced the grain require- 

 ments per pound of gain to a smaller amount than that required of corn alone. 

 . . . The advantages of the supplemented rations over those of corn alone increase 

 with the cost of feeds. 



"The higher grains are in cost the greater is the profit from the use of supple- 

 ments with corn, though oil-meal, middlings, and bran were well worth the cost for 

 dry-lot feeding, even when corn was as low" in value as thirty cents per bushel; that 

 is, the supplements do not double in cost as corn doubles in selling price. 



"Poorly fattened corn-fed hogs dressed higher percentages of carcass to live 

 weight than much fatter hogs which had been fed on more nearly balanced rations. 

 Unduly bulky foods lower the profit for both the farmer and packer; the hog that 

 returns the greatest profit to the farmer is the one that eats the greatest amount of 

 digestible nutriment; the hog that returns the greatest profit to the packer is the 

 one that eats the smallest amount of the most concentrated ration. 



"Milk, or grass, or water mixed with the feed, tend to produce a sbrinky hog; so 

 does indigestible substances like the fiber of bran and corn cob. 



"The packer can afford to pay more for a hog that has had a concentrated grain 

 ration during finishing than for a hog that has had bulkier rations from whatever 

 cause. 



"Summer feeding in the dry lot in Missouri appears to cost much more for each 

 pound of increase than dry-lot feeding in spring or fall." 



Conversion of waste, W. H. Clarke (Agr. Gaz. New South Wales, 15 (1904), No. 

 10, pp. 953-962, Jigs. 25). — The system of pig feeding at a large charitable institution 

 where a herd of about 300 animals are fed the kitchen and table waste is described. 

 The industry is regarded under the conditions as profitable. Brief statements are 

 also made concerning the institution dairy. 



The enzym content of the mucous membrane of the pig's stomach and its 

 changes during digestion, F. Bengen and G. Haane (Arch. Physiol. [Pfli'<ger~\, 

 106 (1905), No. 6-7, pp. 267-285). — According to the investigations reported, the 



