by feedingjmore meal we made milk at a cost of 2.47,2.70, 2.68 

 and 2.36 cents. The upward tendency of the curves in periods 



3-5 show increased cost. Period 6 shows that a substitution of 

 .gluten meal instead of the grain previously fed had the effect of 

 materially reducing the cost. Period 7 marks a low cost and a 

 high yield. With the loss of yield in Period 8 we note an 

 increased cost, and then follows several periods of dimish- 

 ing yield and slowly increasing cost. Period 16 shows an 

 unusual circumstance ; the sudden falling off of milk would 

 •under most circumstances be attended by an increased cost per 

 ■quart, but in this case both quantity and cost go down at the 



13 



