586 
The Comparative Feeding Values of 
bullocks, to be fed on decorticated cake, were kept in the left-hand 
boxes, and the other four, to be fed with common cotton-cake, in the 
right-hand boxes. The bullocks were selected with care, there being 
only 2 lb. difference between the total weights of each set of four. 
The foods given to each lot were as follows : — 
Left-side boxes. 
Decorticated cotton-cake. 
Linseed-cake. 
Barley. 
Eoots and hay-chaflE ad lib. 
Right-side boxes. 
TJndecorticated cotton-cake. 
Linseed-cake. 
Barley. 
Eoots and hay-chaff ad lib. 
Thus, the only difference between the foods was in the kind of 
cotton-cake used in either case. Samples of the foods were taken 
weekly, and the monthly portions analysed. The following table 
gives the average composition of the foods throughout the whole time 
of feedincr ; — 
Decor- 
ticated 
cotton- 
cake 
TJndecor- 
ticated 
cotton- 
cake 
Linseed- 
cake 
Barlej, 
g^ittled 
Hav- 
chaSE 
Boots 
Moisture ..... 
' Albuminous compounds . 
Sugar, starch, digestible fibre, &c. 
Woody fibre .... 
Mineral matter (ash) . . 
' Containing nitrogen . 
9Ci 
14-82 
44-31 
20-56 
4-42 
6-25 
13-85 
4-63 
24-21 
30-76 
21-63 
4-92 
1219 
10-95 
27-25 
33-53 
8-89 
7-19 
18-55 
1- 91 
10-74 
63-28 
3-12 
2- 40 
15-06 
9-90 
41-43 
24-76 
8-85 
8912 
-98 
8-36 
•85 
•69 
100-00 
100-00 
100-00 
- 
100-00 
10000 
100-00 
7-08 
3-87 
4-37 
1-72 
1-58 
•16 
By making, as was done here, all the foods alike with one 
exception, it enabled, as far as was possible, any difference in the 
final weights to be attributed to the cotton-cake, the only varying 
constituent. At the same time, it is undesirable in a feeding e.^peri- 
ment to bind animals down to eat this or that particular quantity of 
food ; therefore, while the additional or artificial foods were indreased 
equally in both cases, the bullocks were allowed to have both roots 
and hay-chaff in the quantities wliich they would clean up well, i.''. 
practically ad libitum. The amounts given were, however, weighed 
out to them, and any not consumed at the end of the day was 
weighed back. The experiment lasted the somewhat long periotl of 
145 days, viz. from December 20, 1SS8, to May 14, 1 889, and was 
divided into three portions, at the end of each of which, viz., 
February 20, March 28, and May 14, the beasts were weighed. They 
began feeding with 4 lb. of barley (grittled), 2|lb. of linseed-cake, 
and 2 1 lb. of either kind of cotton-cake per head daily. During the 
second pericnl the barley was kept the same, the linseed-cake in- 
creased to 3 lb., as also the cotton-cake. In the final period the 
barley and linseed-cake were kept the .same, but the cotton-cake was 
increased gradually until on April 14 it reached 5 lb. per head 
