The Gompodtion of Milk produced on English. Dairy Farm.^. 185 
P.M. Meal 
A.M. Meal 
Date 
1888' 
Yield 
lbs. 
Percentage composition 
Date 
1888 
Yield 
"lbs. 
Percentage composition 
Total 
solids 
Non- 
fatty 
sol ills 
Pat 
Total 
solids 
Non- 
fatty 
solids 
Fat 
Dexter Kerry, No. 192.— Date of Birth not known ; Calved, 2-12-87. 
.•)1-1 
n 
13-7 
9-3 
4-4 
1-2 
13i 
12-6 
9-1 
3-5 
11-3 
lOi 
15-1 
9-2 
5-9 
12-3 
14^ 
12-3 
9-2 
3-1 
20-4 
lOJ 
14-5 
9-4 
5-1 
21-4 
13 
12-8 
9-1 
3-7 
28-5 
H 
14-5 
9-7 
4-8 
29-,') 
m 
12-6 
9-4 
3-2 
26-6 
8 
13-0 
8-9 
4-6 
26-G 
lOJ 
12-6 
8-6 
4-0 
22-8 
7 
13-7 
9-0 
4-7 
23-8 
8 
12-4 
8-6 
3-8 
28-9 
64 
13-3 
9-0 
4-3 
29-9 
8 
12-G 
8-8 
3-8 
19-10 
6 
14-4 
9-4 
5-0 
20-10 
9 
13-3 
9-2 
4-1 
9-11 
■5i 
13-8 
9-4 
4-4 
10-11 
8f 
8 
12-7 
9-2 
3-0 
22-11 
6 
13-9 
9-2 
4-7 
23-11 
12-7 
8-9 
3-8 
19-12 
4i 
14-2 
9-3 
4-9 
20-12 
8 
13-1 
9-1 
4-0 
' The first figure in the date column gives the day of the month, and the 
second the number of the month (e.ff. 2-5 = 2nd May). 
So far nothing has been said about the quantitative j'ield of 
milk, a factor which by many will be considered of higher 
importance than quality. If possible, the two ought to be con- 
sidered together, which is the case in the tables on pages 183-85, 
showing the variations which milk undergoes during the period 
of lactation. As space permits of only a ver}^ limited number of 
specimens being given, I must refrain from drawing definite 
conclusions from them. 
In conclusion, I wish to draw attention to the great stability 
of the specific gravity of milk, which in the case of the mixed 
yield of a number of cows rarely falls outside the limits of 1-030 
and r034 (water = 1 -000). Looking at the considerable varia- 
tions, e.g. between Shorthorn and Jersey milk, this seems curious 
enough, but finds a ready explanation in the fact that the 
higher percentage of fat, which tends to lower the specific 
gravity, is generally accompanied by an increased amount of non- 
fatty solids, exercising an influence in the opposite direction. 
In the case of milk of individual cows one would naturally 
expect larger variations, and they certainly do occur. However, 
among the 1,652 samples of Shorthorn, Jersey, and Kerry milk 
upon which the diagram on page 202 is based, there are only 50 
samples of specific gravity laelow 1-030, and only 73 — notably 
Jersey milk — of specific gravity above 1-034. By far the 
greater number of these exceptional specific gravities are not 
lower than 1-029, nor higher than 1-035. The lowest and 
highest figures observed were 1-0240 and 1-0365 respectively. 
