AUKICULTUIVL KXPEIKMKNT STVPION. 



i99 



As is well known, the dig^'stibility of protein, as shown in tables 

 of fodder analyses, is calculated l)y assuming that all the nitrogen 

 of the feces belongs to the undigested residue. The coefficients of 

 digestibility previously given were so calculated. 



In the next table these cocffi ;ieiits are compared with those ob- 

 tained by reckoning as undigested nitrogenous material, that left in 

 the feces after successive extraction with ether, alcohol, hot water 

 and cold lime water, anci after digestion with a pepsin S(;lution, and 

 also with the coefficients from a pepsin solution. 



For convenience the four methods are designated as A, B, C, and 

 D, respectively. 



DiGKSTlBILITY OF PKOTHTN BV DIKFKRKNT METHODS. 







A. 



B. 



After correc- 



C. 



D. 









tion by ex- 



Alter correc- 











trnction of 



tion bv diges- 



Artificial 







fe : 



feces with 



tion of leces 



pepsin pan- 







2 "3 



ether, alcohol. 



with pepsin 



creas diges- 









hot w.iter and 



solution 



tion. 









Cold lime 













water. 











© -y. 



a 3 . 













s 



u 1 





9 

















> 











: >^m 



T3 O >> 





>. . 







'n J2 — 



c S 



T, '- 'C 



CO) m i: "* 





00 ;:■« 























5 = 2 



% 



Z. ^ 

 % 



111 



2 S ® .5 -■= 

 a,^ W = 3 



£ so 



Exce 

 ordin 

 metb 







% 



1 % 1 % i 





% 



XXIV... 



Alsike clover 



5« . 1 



65.2 



6.2 



69.6 10.5 



j:,,. 



—6.6 



11 



'< 



5S.1 



64.7 



6,H 



68.9 10 8 



XL! 





64. 

 73.3 



72. 1 



81.5 



8.1 

 8.2 



77.9 13.9 



80.3 

 81.8 



16.3 



XLII 



White cliiver 



84.5 



11.2' 



8.5 



XLIII.... 



Blue juiiit 



56.4 



69. 



12.6 



73.9 



17.5 



67 3 



10.9 



XL 



Orchard grass 



58 5 



73.3 



14.8 



75. 7| 17.2 



70.8 



12.3 



XXVII... 



Oat straw 



— 15. '2 



13.1 



28.6 



19. ' 34.2 



^45 6 



1 

 [-78.6 



1 





(t 



1. 



—•2.5 

 '25.9 



27.7 

 i 45.4 



30.2 

 19.5 



38.4 40.9; 



59.5 33 6 





XXVII.. 

 XXX 



< Oat straw and ) 

 f Kaw potatoes \ 



51. 



XXVII... 

 XXX. .. 



( Oat straw and , 

 I Raw potatoes J 



29. 



52.7 



23 7 



68.1 39.1 



L 



Ked top 



^ 60.4 



68 4 



8.0 



72.6! 12.2 



64.1 



3.7 



xxin.... 



Timothy 



45.6 

 44.9 

 60.4 



' 60.2 

 57.9 

 ti9.8 



14.6 

 13.0 

 9.4 



65.8 20.2 

 61.6 16.7 

 74.8 14.4 



^56.6 

 74.2 









11.4 



XLIV 







13.8 



LI 



(( 



44 5 



48 5 



! 56.7 

 63.4 



12.2 

 14.9 



64. 19.5 

 68. 19.5 



63. 



65.4 



18.5 



XLV. . 



Wild oat grass 



16.9 



XXXIX . 





64.2 



57.8 



73.9 



! 67.5 



9.7 

 9.7 



80.5 16.3 



72.6 14.8 



78 7 

 75.8 



14. 5 



XLVl ... 



Buttercup 



18.0 



XLVII ... 





58.4 



65.7 



8.3 



72.8 14 4 



1 



73.3 



14.9 









