in the Winter of 1885-6. 
523 
the addition of undecorticated cotton-cake to linseed-cake has 
not given a more profitable feeding result. 
Having considered the foods in respect of their cost and rela- 
tive feeding values, the further feature of their relative effects as 
manurial agents must not be overlooked. Doubtless the most 
satisfactory way of settling this would have been by the actual 
experiment of growing subsequent crops of barley, &c., by the 
manure from each pen. Previous experiments, however, having 
told how varying the soil of this field was, and that it could not 
be relied upon to give correct results, this plan was found to be 
impracticable. In the Tables of the manurial values of pur- 
chased foods, drawn up by Sir J. B. Lawes and Dr. Gilbert, we 
have, however, data which may be applied here. Taking the 
figures therein given, the following are the manurial values per 
ton of food consumed : — 
Manurial Value 
per Ton. 
£ s. d. 
Linseed-cake 3 18 6 
Undecorticated Cotton-cake 3 8 8 
Beans 3 3 5 
Oats 1 9 10 
Wheat 18 7 
Barley 16 1 
From these figures it is apparent that the manurial value of 
the mixture of linseed-cake and undecorticated cotton-cake is 
less than of linseed-cake alone, whilst, as regards the mixtures 
of oats and barley and of oats and beans, these are lower than 
either of the cake diets in manurial value, and also, in the 
case of the one, only equal, and in that of the other lower in 
feeding value. It will be only necessary, therefore, to compare 
the linseed-cake and wheat. 
Taking the figures of Lawes and Gilbert's Table, the 
manurial value of the 58B lbs. of linseed-cake used during the 
106 days would be 20s. Id. ; of the 588 lbs. of wheat 7s. Qd., 
or an excess of 13s. \d. in favour of the linseed-cake. As against 
this, we have to consider that in the case of the wheat 418 lbs. 
of increase were obtained at the rate of Id. for each lb., whilst 
the cost of 1 lb. of increase with linseed-cake was l'39c?. Hence 
the extra cost due to linseed-cake in producing 418 lbs. increase, 
would be 418 X 0"39 = 13s. Id. This gives over the whole 
period of 106 days a merely nominal advantage of 6fZ. in favour 
of wheat as against linseed-cake. Next in order comes the 
mixture of linseed-cake and cotton-cake, which has a higher 
manurial value than the remaining two, and an equal or better 
feeding value. Comparing oats and beans, when mixed in equal 
proportions, with barley, it will be found that in using 588 lbs. 
2 M 2 
