MANUAL OF OATTLE-rEEBIKG. 



175 



cows we have three investigations, carried ont respec- 

 tively by Voit ^ in Mxmicli, E. v. "Wolff f in. Hohenlieim, 

 and G. Ktilm and M. Fleischer :|: in llockern. 



In the first a rich fodder was given, in the two others, 

 on the contrary, one less rich in albuminoids* 



In the following table the sum of the fat of the fodder 

 and the fat which might have been formed from the pro- 

 tein of the latter (61.4 per cent, of the protein consump- 

 tion) is compared with the amotmt actually found in the 

 milk. The numbers are grammes per day and head : 





Fat of 

 fodder. 

 Grms. 



Fat from 

 protein. 

 Grms. 



Total. 

 Gims. 



Fat of 



the milk. 



Grms. 



Munipli, Experiment a 



S18.8 



401.8 



730.6 



577.5 



*' " b 



276.0 



308.5 



584 5 



337.3 



Hobenheim, " I. . . ,. . 



170 5 



160.1 



330.6 



303.3 



*' II 



166.5 



171.3 



337 8 



290.5 



Mockem, " I 



183.5 



79,5 



263.0 



277.5 



'* " 11 



183 5 



69.6 



253 



292.0 



In the Munich and Ilohenheim experiments, the fat 

 available from the two sources named was more than 

 sufficient to account for that produced in tlie milk In 

 Mockem, on the contrary, a small excess of milk-fat was 

 found; but even if this excess had been considerably 

 greater, no definite conclusions in regard to its source 

 could be drawn. Equilibrium between the supply and 

 excretion of nitrogen was, indeed, established in the Mock- 



* Zeit. f. Biologie, 1869, p. 113. 



t Emahrmig Landw. Nutzthiere, 34.9. 



fLandw. V. St., XIL, 451. 



