28 



DAIRYING 



any, in amount, and in richness of milk of the two milkings. When 

 farmers are busy during the long days of the year, the cows are 

 often milked at 4:00 A. M. and at 8:00 P. M. At such times there 

 is an interval of eight hours between night and morning milkings, 

 and 16 hours between the morning and night milking. Under 

 such conditions the morning milk is the richer, as the longer the 

 time between milkings the thinner the milk. 



179. Fleischmann made careful observations on the weight 

 and composition of milk from a herd which averaged 129 cows 

 during a year. His figures show the following: 



Average richness of morning and night milk of herd of 129 cows 



No. of Cows Morning Milk Night Milk 



Oct. to Jan 126 



Jan. to April 117 



April to July 139 



July to Oct 136 



Fat % 



3-15 

 2.97 



3-32 

 3.60 



Average 129 3.26 3.18 



This shows that with herd milk, where there is not much dif- 

 ference in the number of hours between the night and morning 

 milkings, the richness is very uniform. 



180. The variations that may occur in the night and the 

 morning milk of one cow are shown by the following figures : 



Daily Average and Extremes in the Milk of One Cow.* 



Month of | 

 Lactation Milk 

 Period Extr. 



Night milkings 



Morning milkings 



Ibs. j Fat per cent. 



Milk 



Ibs. 



Ave. 



Extr. 



Ave. 



Extr. 



Ave. 



Fat per cent. 

 Extr. I Ave. 



Illinois Bui. No. 24. 



