New York AqGricuLTuRAL Experiment Station. 123 
Although it was found possible, when using a large number of 
foods in contrasted rations of these kinds, to have the ordinary 
groups of organic compounds in approximately equal proportions 
there was always a much larger amount of mineral matter in the 
one ration owing to the bone of the animal meal. So there was 
sometimes nearly three times as much phosphorous in the one ra- 
tion as in the other. Calculating all the phosphorous as phos- 
phoric acid, there was in the animal meal ration fed to chicks and 
hens generally about 3.9 per ct. of phosphoric acid, while in the 
ration of vegetable origin there was about 1.4 per ct. In the con- 
trasted rations for ducklings there were 4.0 per ct. and 1.9 per ct. 
of phosphoric acid, respectively. 
By using bone ash in another series of experiments, the amount 
of phosphorus was made to equal and sometimes slightly exceed 
that in the animal food ration, although all the organic matter 
was still derived from vegetable food. ‘There was in the animal 
food ration fed to chicks, phosphorus equivalent to about 3.9 per 
et. of phosphoric acid and in the contrasted ration to about 4.0 
per ct. The animal food ration for ducklings contained about 
3.6 of phosphoric acid and the vegetable food ration about 4.0 
per ct. Both rations for laying hens contained about 3.6 per ct. 
of phosphoric acid. Practically the same relative amounts of 
protein, fats and carbohydrates existed in the contrasted rations. 
The vegetable food ration, thus supplemented by the mineral mat- 
ter of bone ash, when fed to chicks, proved fully equal to the 
ration containing animal meal, so far as rapidity of growth was 
concerned. In economy it was even somewhat superior, for con- 
siderable less food was required for equal results. For laying hens 
the rations were equal in efficiency for some months, but the ration 
containing animal food proved somewhat more enduring in its 
effects. With ducklings the ash-supplemented ration of vegetable 
food proved decidedly inferior to the corresponding ration con- 
taining animal food. 
From these results it appears that rations containing a neces- 
sary amount of protein and having the relation of the ordinarily 
