119 



Samples of the milk of newly-calved cows were collected 

 lay Mr. J. McLaren, Junr., the superintendent of the station, 

 and forwarded to Mr. S. H. Collins, M.Sc., F.C.S., Lecturer 

 in Agricultural Chemistry at Armstrong College. The results 

 of Mr. Collins's analyses of these milks are given in the tables 

 annexed. 



The foregoing figures give a good idea of the composition 

 of colostrum for the first whole day after calving. On the 

 average, normal milk contains about the following : Water, 

 87 per cent. ; casein, 3 per cent. ; albumen, -4 per cent. ; 

 milk sugar, 4' 75 per cent. ; fat, 3'6 per cent. ; and ash, '75 

 per cent. The average specific gravity of milk is 1'032. 

 In all Mr. Collins's results the fat was very irregular and the 

 results with this constituent were worthless to further the 

 objects of this enquiry. The high total amount of albumen 

 and casein is entirely due to abnormal albumen, while milk 

 sugar is considerably under, and ash considerably over, the 

 average. 



In the following cases the determinations were continued 

 until the sixth or seventh days after calving. The mixed milk 

 is a mixed sample of the two or three milkings of .one day. 

 The following contractions are used : M, morning ; N, noon ; 

 E, evening: 



COW No. 2. CALVED 20-ra MAY, 1907. 



