AGRICTILTURAL EXPERIMENT STATION. 



201 



.XXIV .... Alsike clover. . 



xLi ; «' 



XLir White clover.. 



XLILI.... Blue joint 



. XL Orchard grass . 



XXVrr ... Oat straw 



XXVII . . . Oat straw and raw pota- 

 XXX toes 



L Ked top . 



XXIII.... Timothy. 

 XLIV ...' " 



LI 



XLV Wild oat grass. 



XXXIX ..I Witch grass... 



XLVI .. 



Buttercup 



XLVII ... White weed. 





70.4 



88.8 

 103.8 

 64.3 

 52.5 

 12.5 



38.9 



59.8 



41.6 



52.5 



41. 



48. 



59. 



63. 



59, 



H-S 



344.0 

 349.5 

 374.0 

 251.5 

 323.7 

 158.6 



342.6 



347 6 

 320.4 

 408.9 

 276.2 

 378.9 

 360.1 

 331,3 

 340.7 



Nitrogen extracted from 



feces by succesfiive treat- 

 ment with ether, alco- 

 hol, hot water and cold 

 lime water. 



CM 



.€8 

 1.14 

 1.40 

 1.27 

 1.22 



.60 



1.33 



.76 

 .99 

 .79 

 .82 

 1.09 

 .95 

 .92 

 .72 



o .2 2 



O M.- . 



0) o . - 



o 2 3 S 



!^ bo9 bo I 



.20 

 .33 

 .37 

 .50 

 .37 

 .38 



.39 



.22 

 .31 

 .19 

 .30 

 .29 

 .26 

 ,28 

 .21 



.96 

 1.30 

 1,32 

 1,97 

 2.32 

 4,80 



3.42 



1,27 

 2.38 

 1.50 

 2,00 

 2,27 

 1,59 

 1,45 

 1,22 



The value of the foregoing observations as an aid in solving the 

 problem of protein digestion must be decided according to the 

 answer given to the following question : Do the solvents used in 

 methods B and C extract from the feces any of the undigested 

 protein? If not, then there seems to be good reason for applying 

 some method of correction to the coefficients of digestibility of 

 protein as usually determined. If nitrogenous waste products are 

 present in the feces to the extent these methods indicate, the error 

 they cause is too large to be ignored. 



Let us first consider method B, The solvents used are ether, hot 

 alcohol, hot water and cold lime water. 



