202 AGKICULTUKAL EXFKKIMENT STATIf)N:- 



It seems to be generally aeknowledged that tlie ether aodf' 

 alcohol remove onls' hiliar\ prodactp. This assumption may safely 

 bn regarded as correct, unle-s the feces contain amide*, certai»' 

 acid amides at least being soluble in both these liquids. If amides, 

 or peptones are present, then the extrac,ti(^n with hot water is also 

 not allowable ; oilierwise it would seem to be, for it is not probable 

 that treatment of the feces for ten minutes with hot water would 

 dissolve any alliurainoids that had with.-?tood the long-continued' 

 action of the digestive fluids. 



In fact Dr. Armsb\ 's work on the separation of alluuninoids from' 

 amide nitrogen in hays shows that treatment with hot water extracted" 

 no more nitrogen than Siiitzer's method where a precipitant is used' 

 to bring down any all)uminoids that might be in the water solution. 



It seems haidly pi'oi)able that the feces contain peptones or' 

 amides. 



Thf^se are compounds soluble in water, and are those into which 

 the albuminoid"' of the food are transformed in or'der that they may 

 be le^oilitd. It seems as probable that these substances should be 

 wh'.lly iv^orbed as that sugar should be, which is either in the food, 

 or is formed from the starch of the food, and as can be seen later,- 

 the feces examined in these experiments were found to contain OO' 

 sugar 



In future work, however, tests will be made for peptones and> 

 amides. 



An examination of the figures given shows that the action of cold- 

 lime water tor six hours i-emoved considerable nitrogen not taken' 

 out by the other three solvents. Did any of this nitrogen come- 

 from the albuminoids of the feces? 



The results of an experiment with two hays indicate a npgative- 

 answer to this question 



Hays XLII and LI were submitted to an ordinary pepsin diges- 

 tion for twenty-four hours, and also to the usual pepsin-pancreas- 

 digestion, after which they were allowed to stand for different 

 lengths of time in a cold saturated solution of calcium hydrate.- 

 Below are the figures showing the nitrogen in the hays before and^ 

 afttr standing in the solution. 



