24 



DAIRYING 



172. By dividing the lactation periods by five cows into 

 months which may have been at different seasons of the year, the 

 following results were obtained. 



Daily Average Milk Pounds and Fat per cent. During Each Month 

 of the Lactation Period of Several Cows in the Same Herd.** 



These records illustrate some of the peculiarities of different 

 cows in the changes in quantity and quality of their milk through 

 one lactation period. The milk of cow No. I decreased gradually 

 in flow and increased in richness during* an eleven month period. 

 No. 3 gave milk for 14 months ; and when she finally was dry the 

 richness of her milk had not increased to a very high figure. Cows 

 Nos. 4 and 5 had shorter milking periods and the decrease in flow 

 of milk was rather sudden, with not much increase in richness at 

 -the end of the lactation period. 



** Illinois Bui. No. 24. 



