Avas omitted at this point which prevents a direct comparison of 

 the Southern corn ensilage and the Northern. There should 

 have been two or three periods of feeding and the same grain 

 ration as that used in Period 6. Instead of this the grain ra- 

 tion was reduced to a very small amount, i^ lbs of gluten and 

 corn and cob meal. With this reduction the yield fell off in a 

 few cases, but in the majority of the records it increased, reach- 

 a maximum during the seventh period in the total yield. The 

 new ration gave an increase of 13%. reducing the cost of a 

 quart of milk from 2.83 cents to 2.17 cents, thus nearly reach- 

 ing the level of the first period. 



Period eighth shows a marked falling off in yield of milk in 

 all cases. The total for herd falls off 12%, the total for the 

 ten cows whose individual record was kept drops 11%. The 

 only change of food in this period was the substitution of two 

 pounds mixed corn and oats in place of the gluten and corn 

 mixture of Period 7, but as only i^ pounds of the latter had 

 been fed the two pounds would be fully equivalent, hence we 

 must look for some other cause for this sudden decrease. In 

 Cut I, Sec. 3, I have plotted a curve representing the average 

 •temperature for each period. This curve is made up from Ta- 

 'ble C. 



TABLE C. 

 Period 123456 78 9 10 11 12 13 14 15 16 17 



Av. temp. 



in degrees, 35 30 27 15 19 ii>^ o -i i8>^ 12 17 31 12 i8>^ 3i>^ 24 28 



These are out door and not stable temperatures. 



It was noticed that the temperature was not sufficiently va- 

 ■riable to make any appreciable difference in-doors during the 

 first six periods, but during the 7th period there were two days 

 •of very cold weather followed by a few days of warm weather. 

 These two days brought down the average temperature but did 

 not affect the milk flow as the stable temperature was not great- 

 ly reduced, but in the eighth, a severe period of windy days, un- 

 usually low temperature, made the stables very cold. This con- 

 dition of affairs undoubtedly caused the falling off in product, 

 and therefore the food cannot be charged with being of less nu- 

 tritive value. During Periods 9 and 10 there was an increase 

 of milk, but only slight. From 10 to 15 there is a comparatively 

 iuniform falling off amounting to 2% per period. 



1 1 



