1470 FEEDS AND FEEDING 



Experiment I. Retention of caseinogen nitrogen on the carbohy- 

 drate-rich fat-poor diet. 



Experiment II. Retention of caseinogen nitrogen on the intermediate 

 diet. 



Experiment III. Retention of caseinogen nitrogen on the fat-rich, 

 carbohydrate-poor diet. 



Experiment IV. Retention of gelatin nitrogen on the carbohydrate- 

 rich, fat-poor diet. 



Experiment V. Retention of gelatin nitrogen on a fat-rich, carbo- 

 hydrate-poor diet. 



The conclusions were as follows : 



1. Nitrogen in the form of protein added to a carbohydrate diet 

 is retained in greater amount than when added to a fat diet of equal caloric 

 value. 



2. Nitrogen given in the form of caseinogen is more completely 

 retained than when given in the form of gelatin. 



3. The addition of meat extract to gelatin does not increase the 

 amount of nitrogen retained. 



The paper does not deal with the problem as to how the carbohydrate 

 acts, but it will possibly be treated in another paper. 



1090 - The influence of Phosphates on the Feeding of Cattle. — piccinini mario in La 



Clinica Veferinaria, 3glh j'ear, Xo. 13-14, pp. S'^^S-.-.gi- Milan, July 30, i()i6. 



Investigations were carried out on the influence which the dijBferent 

 compounds of phosphorus have on the growth of young animals . As it 

 was intended to treat the latter from their birth, a preUminary investiga- 

 tion was made to determine whether it is possible to influence the amount 

 of phosphorus in the milk of the mothers by the administration of different 

 phosphorus compounds. This preparatory work was carried out on three 

 cows belonging to the Zootechnic Institute of the Royal Veterinary School 

 of Naples. The phosphorus was administered in the form of bone powder 

 (23 per cent phosphoric acid), dicalcic and tricalcic phosphate (44 per cent 

 phosphoric acid), calcium glycerophosphate (25 per cent phosphoric acid) 

 and a cereal decoction. During the course of the investigation the three 

 cows always received the same diet. The milk from each stage was exact- 

 ly weighed, from it a sample proportional to the quantity produced was 

 withdrawn and this was employed for the estimation of the phosphoric 

 acid. 



The trials covered five periods, each of which can be divided into three 

 parts. In the first, lasting eight days, the animal received the ordinary diet 

 and this period served to render constant the phosphoric acid content of 

 the milk produced. In the second, lasting from three to six days, the com- 

 pound, of which it was desired to determine the influence, was administer- 

 ed. In the third, lasting eight days, the feeding reverted to the normal and 

 the administration of phosphorus was suspended. The last period served 

 to indicate how long the influence of the phosphatic substance adminis- 

 tered in the preceeding period persisted. 



From the amounts of phosphoric acid found in the milk before, during 



