New YorK AGRICULTURAL EXPERIMENT STATION. SI 
pounds. The low phosphorus ration carried in all cases more 
digestible protein than did the other ration. The supply of nutrients 
was abundant in all periods. (See Table 13.) 
2. The amounts and forms of ingested phosphorus in the two 
rations—The quantities of phosphorus compounds which the two 
rations carried were not so greatly unlike as was the case in the 
arst experiment. In both periods of the higher phosphorus feeding 
the amount of ingested phosphorus was 37.3 grams, while in the 
other two periods the quantity was 18.2 grams and 20.2 grams re- 
spectively. The proportions of the various classes of phosphorus 
compounds in the two rations were quite unlike what was found in 
the first experiment. Approximately 57 per ct. existed in forms 
insoluble in dilute hydrochloric acid or what we believe to be 
chiefly nucleins and nucleo-proteids. Thirty per ct. existed as 
soluble organic phosphorus in ration 1 and from 23 to 24 per cent. 
in ration 2. The inorganic phosphorus remained practically a con- 
stant quantity in the two rations, viz. 4.7 grams daily. This experi- 
ment was also unlike the first one in that the two rations differed 
chiefly in the quantities of insoluble phosphorus compounds which 
they carried rather than in the proportions of phytin. (See Tables 
18-21.) 
3. The relation in amounts and forms of the ingested and the 
outgoing phosphorus.—In no period was the quantity of ingested 
phosphorus equal to the outgoing amount. With ration 1 this de- 
ficiency was from 2.5 to 4.7 grams daily, while with ration 2 it was 
I2 grams in one period and 9g grams in the other. These data fur- 
nish another illustration of the fact that a cow is able to make good 
a phosphorus deficiency in the ration from the store contained in 
her body. We regard it as unfortunate that in this experiment we 
were not able to feed an excess of phosphorus compounds in the 
high phosphorus ration. 
In regard to the proportionate distribution of phosphorus com- 
pounds in the ingesta as compared with the egesta, the facts are 
essentially similar to what was found in the first experiment. The 
quantity of excreted phosphorus increased and decreased with the 
amount fed, and as in the first experiment the variations in the out- 
going amount were found to occur chiefly with the proportions of 
inorganic forms in the egesta. (See Tables 18~21.) 
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