554 



ANNUAL REPORT OF THE 



Off. Doc. 



(e.) Advance of Lactation Period. — The following figures, showing 

 the variation of water m milk with advance of lactation of period, 

 are based upon averages derived from an aggregate of nearly fifty 

 lactation periods of individual cows, covering the first ten months 

 of lactation: 



We notice a general tendency for the water to increase for three 

 months, after whcih there is a constant decrease to the end of the 

 lactation period. A similar tendency is shown in the illustration 

 given below, which covers a large number of samples of milk ob- 

 tained from cheese factories, representing practically the first six 

 months of the lactation period. 



