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New York AGrRicuLTuRAL Experiment Station. | 147 
\ 
which had entered upon their second period of lactation had con- 
sumed ‘between the first and second period of lactation a large 
_ amount of fat which may have been stored up for future demands. 
It will be seen by the table that while fourteen of the twenty - 
cOWws consumed an aggregate excess of fat in their food of 318 
pounds over that produced in their milk, that six of the cows 
yielded an aggregate of 284 pounds more fat in their milk than 
they consumed in their food; but in this connection, and perhaps 
explaining this fact, it will be seen that during the short interval 
which elapsed between the first and second period of lactation, 
eleven of these cows consumed and may have stored up as body 
fat, 275 pounds of fat consumed in their food, and it is not 
improbable that the demand made upon these six cows for the 
extra 284 pounds of fat which they produced in their milk may 
easily have been stored up by them during the period preceding 
their first period of lactation. 
It will be seen that the twenty animals consumed in all 5,421 
pounds of pure fat, and yielded in milk 5,108 pounds, an average 
of fat consumed 6.1 per cent. in excess of that produced in their 
milk. 
‘Also that fourteen of the cows consumed in all 3,570 pounds of 
pure fat and produced in milk 2,973 pounds, only 83.3 per cent. 
' of the amount consumed by them, while the remaining six con- 
sumed in all 1,851 pounds and produced in milk 2,135 pounds, or 
15.3 per cent. more than was consumed by them during this 
_ production. 
