302 



BOARD OP AGRICULTURE. 



[Jan., 



to move about seven or eight times as far to reach, the surface with 

 deep setting as they do with shallow setting. 



Between June 12th and July 1st, 1877, a second series of experi- 

 ments was carried out at Raden on the same plan as the first. The 

 results were as follows : 



In round numbers, it took 1 lb. of ice for every 2 lbs. of milk ^o 

 keep the water at the required temperature. That the morning 

 milk was a little richer in butter than the evening milk may be ex- 

 plained by the fact that the cows grazed at pleasure through the 

 night while by day they were driven slowly through the fields, and 

 also by the fact that the lower evening temperature is more favor- 

 able for the milk secretion than the heat and sultry air of the day- 

 time. The milk for these trials was drawn from the vat holding 

 the whole milking of the herd, and may not have been a perfectly 

 accurate sample of the whole. 



Taking the average result of these experiments we find that the 

 yield was : 



12 hours. 



Deep setting, at 40.2°, 82.5 



Shallow setting, at 57.2°, . . . 80.1 



With deep setting the yield of fat was about two per cent, more 

 than with the Holstein method at the end of twelve and also at 

 the end of twenty-four hours, but after thirty-six hours there was 

 very little difference between the yield by the two methods. The 

 average increase was : 



12-24 hours. 



Deep setting, 7.0 



Shallow setting, 7.3 



24-36 honre. 

 0.8 



3.5 



