136 



FARM ARITHMETIC. 



What was the per cent increase of milk when the ration 

 was changed from hay to hay and silage ? 



446. This experiment was continued at the same sta- 

 tion, the cows being fed first the silage and hay ration 

 and then changed to the hay ration. The total yields were 

 as follows : 



On silage and hay, 

 Changed to hay, 



1,200 pounds 

 1,100 pounds 



What is the per cent of decrease of milk when the ra- 

 tion was changed from silage and hay to hay? 



ANGUS STEER SHOWING BEEF TYPE. 



Cost of producing butter fat. A herd record that 

 includes cost of feed for each cow and amount of milk 

 and butter fat she produced, enables the owner to estimate 

 the cost of production with exactness. 



The results for some cows at the Cornell Station were 

 as follows: 



