306 
Milk. 
On tlie influence of food on the quantity and quality of the 
milk, we possess valuable practical experiments by the late 
Mr. Horsfall, of Burley Hall, Yorkshire, whose paper on Dairy 
Management in this Journal should be attentively studied by 
every dairy farmer ; experiments by Mr. Cunningham, of Audley 
(Cork), and a few others, may also be found recorded in our 
Agricultural Journals. For this reason I shall pass them by and 
direct attention to a series of valuable experiments, which were 
made in 1855, by Mr, Struckmann, of Wartburg, in Germany. 
Their object was to determine what quantity of brewers' grains 
are necessary to replace 1 lb. of rape-cake, and also the compara- 
tive practical effect of the same amount and quality of food upon 
good and bad milking cows. 
Accordingly four good and four bad cows, all of which had 
calved some weeks before, were put up on the 22nd of February, 
and fed as is stated in the subjoined condensed table. The 
weight of the animals was ascertained from time to time, the 
milk carefully measured each day, and the amount of butter 
which it produced noted down. The following were the 
results : — 
I, 
11. 
ill. 
IV. 
V. 
VI. 
Duration 
of each 
Experimeutal 
Period. 
122 Feb. 
I 1 March 
1 9 March 
27 March 
5 April 
14 April 
22 April 
Daily Food per Cow in 
each Period. 
lbs. 
(18 Brewers' grains 
36 Mangolds .. .. 
'25 Oat-straw .. .. 
|5'4 Rapecake .. 
36 Mangolds .. 
125 Oat-straw . . 
j4' 5 Kapccake .. 
36 Mangolds .. 
(25 Oat-straw .. 
[18 Brewers' grains 
(36 Mangolds .. 
( 25 Oat-straw . . 
[18 Brewers' grains 
45 Mangolds } , 1094 
1 25 Oat-straw .. 
112 Brewers* grains 
<45 Mangolds .. 
25 Oat-straw .. 
Average Weight 
per head. 
Superior 
Cow.s. 
lbs. 
1065 
1087 
1097 
1118 
1112 
1116 
Inferior 
Cows. 
lbs. 
1039 
104 
I) 
1072 
1085 
1118 
lOSG 
1098 
Daily Aver,ige 
yield of Mill£. 
Superior 
Cows. 
Litres." 
43-6 
46-5 
43-4 
40*9 
37-9 
33-9 
Inferior 
Cows. 
Litres. 
29- 5 
30- 5 
29-2 
28- 7 
27-7 
26-0 
Daily 
i'roduco 
in 
Butter 
from the 
Milk of 
s Cows. 
lbs. 
3-4 
3-8 
3-6 
2-9 
2-9 
2-7 
The brewers' grains contained 79 per cent, of water. 
It appears from these experiments : — 
♦ 1 Imperial Gallon = 4j Litres. 
