ILLINOIS STATE DAIRYMEN'S ASSOCIATION. 243 



ences are inconsiderable and notably less than the corresponding differ- 

 ences in fat production. In the six remaining cases the rate of manu- 

 facture is the same for both periods or slightly in excess for the longer. 

 This substantially agrees with the yield of milk as a whole rather than 

 with the secretion of fat which tends- much more strongly to be higher 

 for the shorter period. So true is this that the following table show- 

 ing the average per cent of solids not fat for the morning and evening 

 milking exhibits only inconsiderable differences, which, moreover, are 

 by no means constant as between morning and evening milk. 



Table 8. The average per ceni; of solids not fat, morning and even- 

 ing milk. 



JOCK DOLLY EVA JANET r^.^^^I. 



Pietertje 

 a. m. p. m. a. m. p. m. a. m. p. m. a. m. p. m. a. m. p. m. 



May 9.42 9.51 9.45 9.33 9.07 9.11 8.98 8.85 9.00 9.05 



June .... 9.92 9.88 9.46 9.48 9.03 9.10 9.19 9.02 9.03 9.02 



July 9.69 10.07 9.30 9.39 9.19 9.09 9.01 9.05 9.16 9.08 



VARIATION IN TOTAL SOLIDS. 



It now seerns well to combine the fat and solids not fat and study 

 the rate of production of total solids. 



Table 9. Yield of total solids calculated per hour, morning and even- 

 ing milk. 



JOCK 

 a. va. 

 May ..... .142 



June 098 



July 017 



Average . .085 .094 .113 .115 .084 ,091 .117 .119 .151 .159 



With four exceptions the- production of total solids' calculat^idi per 

 hour was' higher during the shorter period. Of these exceptions three 

 were in favor of the longe-r period; and in one the hourly prodiuction was 

 equal in both periods. Notwithstanding these exceptions, however, the 





DOLLY 



EVA 



JANET 



Lady 

 Pietertje 



3. m. 



a. m. p. m. 



a. m. p. m. 



a. m. p. m. 



a. m. p. m. 



.144 



.118 .115 



.093 .102 



.122 .118 



.176 .180 



.110 



.119 .116 



.086. .091 



.124 .124 



.155 .160 



.028 



.103 .115 



.070 .080 



.104 .114 



.122 .139 



