CHAPTER XXXV. 
COMPOSITION OF FEEDING STUFFS. 
Tue table which follows has been taken mainly from Prof. 
Henry’s ‘‘ Feeds und Feeding.” The table is not complete, 
but it covers most of the feed-stuffs which are at all likely to 
be used for hogs, and a number which are not suitable for hogs 
are included for purposes of comparison. 
It will be noted that the table gives the composition of the 
feed-stuffs, and not the digestible constituents. There are 
three main reasons for using this style of table in preference 
to one showing digestible constituents. In the first place, 
digestion trials are usually conducted with ruminants (sheep 
or cattle), and the digestive powers of ruminants, in some 
cases at least, are different from the digestive powers of the 
hog; consequently the table might be misleading if it purported 
to show the digestible matter only. In the second place, digestion 
trials have not been made with all of the feed-stuffs mentioned. 
Finally, in the case of feed-stuffs which are sold under guaran- 
tee, it is the composition and not the digestible matter which 
is shown in the analysis, therefore, when purchasing feeds, a 
table showing the composition of feed-stuffs would be much 
more valuable for purposes of comparison than one showing 
digestible matter. 
Ash represents the mineral matter in the feed, and is useful 
in building up the skeleton of the growing animal. 
Crude protein is the nitrogenous part of the feed, and is 
useful in forming muscle or lean meat, blood, milk, and nearly 
all tissues. 
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