178 PRINCIPLES OF POULTRY FEEDING 
Relation of Feed to Character of Product.—Table V shows the 
composition of various poultry feeds and of finished products. 
Note the relatively high proportion of protein in the egg and in 
the mature pullet; also the high fat content of the capon and the 
large percentage of water present in the egg. Admitting the close 
relationship which exists between the composition of feed consumed 
and the products resulting therefrom, the feeder is able to select 
those feeds which will be the most productive of the results desired. 
For example, the richness of corn in fat and carbohydrates would 
lead to the selection of that grain as the basis of a ration for the 
feeding of capons. In like manner meat scrap and green clover 
would occupy a prominent place in feeding the mature hen for 
egg production, because of the large amount of protein and water. 
TasLe V.—Compesition of Feeds and of Finished Poultry Products. 
. Crude Carbo- 
Materials and products. Water. protein. Fat. hydrates. Ash. 
Feeds: 
COrtiichisee os aici penis ch 10.6 10.3 5.0 72.6 1.5 
Oa taioverereis sete Ste eo ache ex tele 11.0 11.8 5.0 69.2 3.0 
Meat scrap..............- 10.7 60.2 25.0 std 4.1 
Green clover.............. 70.8 4.4 1.1 21.6 2.1 
Finished products: 
OM sic seii oad SEE SOR 55.8 21.6 18.8 3.8 
Pullet 55.5 21.2 18.9 3.4 
Capon 41.6 19.4 35.3 3.7 
Fresh egg.............-.55 66.7 12.2 8.9 12.2 
Evolved and first used by Prof. Rice of Cornell University to show the relation between 
feed and product. 
Table V also shows why a high egg yield cannot be reasonably 
expected from birds that are fed on an exclusive corn diet, and 
why other feeds than corn are required to bring tne pullet to ma- 
turity in good laying condition. The importance of a properly 
balanced ration is also manifest, which simply means that the 
ration must show a proper relation between its nutrient content 
and the compounds desired in the product. When eggs are con- 
sidered as the manufactured product, it is plain that raw materials 
of the right kind and in proper amount are essential to their abun- 
dant production. 
A bird is in reality a machine, which may be compared to 
an automobile whose engine must be kept running at a low 
speed but which must have reserve power available when needed. 
The fuel required for maintaining the ordinary speed may he 
likened to the feed required for the bird’s maintenance. When 
