44 AGRICULTUKAL EXPERIMENT STATION. [Jan. 



Conclusions. — A careful examination of the previously 

 recorded results of our inquiry into the respective particular 

 claims of cotton-seed meal, old-process linseed meal and 

 gluten meal as constituents of the daily diet of milch cows, 

 leads us to the following statements : — 



1. The substitution of three pounds of gluten meal by 

 either three pounds of cotton-seed meal or three pounds of 

 old-process linseed meal, at stated market prices, and under 

 otherwise corresponding circumstances, does not materially 

 effect the market cost of the daily fodder ration used in our 

 case. The difference in their market price amounts to 0.3 

 cents in favor of old-process linseed meal. Taking the 

 obtainable manurial value into consideration, as far as the 

 three stated grain feed constituents of the daily diet are con- 

 cerned, three pounds of cotton-seed meal are 0.94 cents 

 cheaper than three pounds of gluten meal and 0.22 cents 

 cheaper than three pounds of old-process linseed meal. 



2. The comparative nutritive effect of cotton-seed meal, 

 gluten meal and old-process linseed meal, as far as their in- 

 fluence on the yield of milk is concerned, in case of otherwise 

 corresponding fodder rations, depends evidently in a con- 

 trolling degree on two distinctly different circumstances, 

 namely, the individual disposition and constitution of the 

 animal on trial, and on the particular kind of coarse fodder 

 constituent of the daily diet. In case of rowen as coarse 

 fodder constituent, cotton-seed meal leads, in five out of six 

 cases, both gluten meal and old-process linseed meal, while in 

 case mixed ensilage or corn stover served as coarse feed 

 the gluten meal competes well with cotton-seed meal. Old- 

 process linseed meal has only been tested with rowen on the 

 present occasion ; it stands but little behind the gluten meal. 



3. The density of the milk in case of the same cow varies 

 but little during the experiment ; the notable changes are 

 apparently, in a controlling degree, ,due to the particular 

 condition and individuality of the cow engaged in the trial. 



