388 



BOARD OF AGRICULTURE. 



Timothy hay, XXIII 

 Clovor hay, XXIV . . 

 Clover hay, XXXVII 

 Oat straw, XXVII.... 



Oat straw, XXVII 

 Potatoes, XXX 



Timothy, XXXIII > 

 Potatoes, XXXII $ 



Q 



00 



p • 



to 00 



Q3 



3 

 00 



a — I o „ _ 



g ^ o '.ti o .2 M 



o -^ 'iS X "" •'^ a ^ 



o — — ><- — — _'0 



K O o o .^ O " 



^^.2 c jja o a 2 



2; 



_ ii ® 'i- o ® 'I 



OS o 



320.4 1.23 



344. I 1.21 



I 



293.3 1.47 



158.6 



342.6 



422.5 



.75 



2.25 



2.16 



.38 

 .35 



.50 

 .47 



.65 

 .51 



Fecal nitrogen soluble in a pepsin solution before and after drying. 

 Pfeiffer* has made the observation that the nitrogen in the feces com- 

 ing from waste gall and intestinal products is completely soluble in a 

 pepsin solution onl}^ when the feces are treated in a fresh condition, 

 i. e., before drying. He found that when the dried feces of pigs 

 which contained no undigested food residue was submitted to a pepsin 

 digestion only about half the nitrogen was brought into solution, but 

 that all the nitrogen was extracted b}' this treatment when the dung 

 was kept in alcohol without drying. 



In the Station digestion experiments with sheep one-thirtieth of each 

 day's excrement was put into alcohol, and at the end of each ex- 

 periment the whole was filtered as dry as possible, thoroughly mixed, 

 and eight grams submitted to a pepsin digestion. 



One-tenth of the daily excrement was dried over a water bath, 

 ground, mixed, after which two grams were digested. The percent- 

 ages of undissolved nitrogen found bj^ the two methods, as given be- 

 low, are based upon the total dry substance in the feces. The 

 solubility of the nitrogen compounds does not seem to have been 

 affected by the drying. 



*Zeit. Phys. Chemie X, p. 568. 



