Experiments on the Feeding of Sheep. 
195 
With regard to the estimates given In the Tables of the amounts 
of food consumed during " Period 2," some explanations are 
necessary. As already stated, the sheep had, during about three 
months out of the seven or eight of the whole period, green clover 
or grass In the field, the amount of which was not weighed ; and 
it was only when they had not such green food that they were 
supplied with hay-chaff and roots. Whenever they had hay-chaff, 
which was during nearly five months out of the seven or eight, 
the quantity consumed was weighed. They had roots for the same 
time as hay-chaff; and In the cases of the Leicesters and cross- 
breds, these were weighed during the whole four or five months ; 
but in the cases of the Hampshlres, Sussex, and Cotswolds, the 
roots were only weighed during two months out of the four or 
five that they were employed. The oil-cake (or lentils) was, 
however, weighed in every case throughout the whole period of 
feeding. There is no difficulty, therefore, in calculating the 
amount of oil-cake consumed by the animal In relation to a given 
live-weight, or to produce a given amount of increase, during the 
whole seven or eight months of the feeding experiment. With 
regard to the hay-chaff and roots, the average rate of consumption 
is taken only over the period In which each was actually consumed. 
And in the estimates given in Table II. of the amounts of fresh 
food, or dry substance of food, consumed to produce 100 lbs. 
increase In live-weight, it is assumed, for the purpose of com- 
parison with the first period of feeding, that the green clover or 
grass eaten In the summer months, was equivalent to the hay-chaff 
and roots consumed when these were the foods employed. That 
is to say, in the Table, the green clover or grass is reckoned as 
hay-chaff and roots, in amount bearing the same proportion to 
the oil-cake as did the hay-chaff and roots, when these were 
actually consumed. The figures given In Tables I. and II. for 
the hay-chaff and roots of " Period 2 " must, therefore, be taken 
as only approximate estimates. They will probably be slightly 
too high, but they are undoubtedly quite near enough for the 
purpose of comparing, on the points in question, the results of 
the second period of feeding with those of the^rs^. 
In Table I., the first division shows that the amount of oil- 
cake consumed per head per week was In all cases considerably 
greater during the second period than the first. The estimated 
consumption per head per week of hay-chaff was also in most of 
the cases rather more, though in some less, in the second period ; 
and that of the roots was always greater in the second period 
than in the first. 
The second division, which gives the amounts of the several 
foods consumed per 100 Ihs. live-xceight per week, shows that, as 
o 2 
