IQISI 



Edgar G. Miller, Jr. 



203 



B. ABSTRACTS OF PAPERS FROM THE COLUMBIA BIOCHEM. DEP'T 

 146. Stiidies in goat metabolism. O. C. Bowes. The fol- 

 lowing data relate to the preliminaries in a study of goat metab- 

 olism. The animal was placed in a cage of the kind in regulär use 

 in this laboratory in experiments on dogs. For the collection of 

 the excreta certain modifications of the cage were made. The 

 meshes of the wire platform, for example, on which the animal 

 stood, were 7/8 in. Square. A special deep drip pan conveyed the 

 excreta to a short chute with a screen of wire netting in the bottom, 

 through which the urine passed into a Container, the feces rolling 

 to the end of the chute into a separate receiver and thus affording 

 a very satisfactory Separation of the latter from the former. 



A separate analysis was made of each feed in the ration, which 

 included weighed quantities of hay, oats, bran, corn meal and lin- 

 seed meal. The coefficient of digestibility, as recorded below, was 

 for the entire ration. A small quantity of bone ash in the diet was 

 found advantageous for hardening the feces and thus facilitating 

 their collection. Aliquot portions of the daily feces were promptly 

 dried and subjected to analysis in composite samples for the whole 

 period. 



The results for 12 days of feeding the above mentioned rations, 

 which followed a preliminary period of two weeks on the same 

 diet, are summarized in the f ollowing table : 



Intake, 

 grams 



Output in 

 feces, grams 



Coefficient of 

 digestibility, per cent 



Total nitrogen 



Total lipins 



Total carbohydrates 

 Total ash 



199.03 



261.65 



9,006.68 



459-35 



77.42 



9467 



3,698.20 



353-92 



61. 1 

 63.8 



59-9 

 22.9 



147. On the precipitation of proteins with Solutions of Chro- 

 mates. Ruth S. Finch. Following the suggestions of Dr. Gies, 

 I have continued some unpublished work by him and Dr. Wm. H. 

 .Welker on the precipitation of proteins from acid Solutions by 

 Chromates. In these preliminary experiments I have endeavored to 

 determine the completeness of precipitation, the scope of applica- 

 tion, and the possible practical uses, of this method. 



When 5 cc. of fresh watery extract of liver are treated with 5 



