300 PRODUCTIVE FEEDING OF FARM ANIMALS 
ciably improved by the method of preparation; nor has it been 
shown that the amount of water fed in the slop of pigs has any 
material effect on the gains made or on the utilization of the feed. 
Swine Feeds.—The various feeds used in feeding swine have 
been previously discussed, and we shall consider here only a few 
of the main swine feeds, especially with reference to feeding prob- 
lems in different sections of the country. 
Indian corn is by far the most important single swine feed in 
this country. The States in the corn belt are growing more pigs 
than any other section, and there is, in general, a parallelism 
in the different States between the two industries, corn growing 
and pork production (Fig. 75). The corn is mostly fed «a the cob, 
and the labor and expense of shelling and grinding are thus saved. 
Trials at a large number of stations have shown that it requires, 
on the average, about 555 pounds of shelled corn per 100 pounds 
gain, or that a bushel of shelled corn (56 pounds) will make very 
nearly 10 pounds of pork. The pigs made an average daily gain of 
0.98 pound in these trials, which were conducted in more than a 
dozen different States and included thirty different series of ex- 
periments. 
Corn is, above all, a fattening feed, and stands at the head of 
desirable concentrates for finishing fattening swine. Both on 
account of its relatively low protein content and high starch content 
(N. R., 1: 9.5) and its low content of mineral matter, it is not well 
adapted for feeding alone to young growing pigs, and much damage 
has been done to our swine industry through the abuse of this grain 
as an exclusive feed for such pigs. The studies of this problem by 
Sanborn and Henry in the eighties were some of the earliest con- 
tributions of the Missouri and Wisconsin stations to the science of 
animal nutrition and have been of the greatest importance to 
American swine-breeders. 
Feeding for Fat and for Lean.—Henry’s striking experiments 
on “ feeding for fat and for lean ” ® were especially adapted to bring 
the attention of farmers to the danger of using corn as a sole feed 
for young pigs (Figs. 75 and 76). In these trials one lot of pigs 
was fed corn meal only, and the other received skim milk, wheat 
middlings, and dried blood or other combinations of protein feeds. 
The method of feeding followed greatly influenced both the gains 
made.by the pigs and the composition of their bodies. The corn 
Indiana Bulletin 86; see also Copenhagen Station Report 10, 1887. 
* Wisconsin Reports, 1886-1890, : c : 
