Experiments on the Feeding of Stock. 
449 
The nitrogen in oats was (mean of 4 analyses) .. 1"660 
„ ■ bran (mean of 6 analyses) 2"269 
„ straw (mean of all tlie analyses) .. .. 1'220 
The total of the food consumed was — 
lbs. grammes. lbs. grammes. 
Mangold .. 772-8 351-290 containing nitrogen 1-2364 562-064 
Oats^ .. .. 159-5 72-500 „ 2-6479 1203-500 ' 
Bi-an .. .. 145-2 70-570 „ 3-5222 1601-233 
Straw .. .. 84-6 38-460 „ 1-0218 469-212 . 
S-42S3 3836-009 
" From the 22nd of February to the 4th of May the two sheep 
produced of mixed excrement 342,360 grammes (753 2 lbs.), or 
on an average 4755 grammes per day (10-46 lbs.), or 2377 
grammes per head (5-23 lbs.) (The average weight of food was 
8*12 lbs. per head, of which 2.f lbs. was dry food.) 
" If in calculating the nitrogen in the excrement we take the 
mean of -635 per cent., deduced from analyses made from Feb- 
ruary 15 to February 21, and from ^Nlav 5 to Mav 9, we find 
that these 342.360 grammes of excrement ought to contain 2174 
grammes (4-78 lbs.) of nitrogen. 
"Each sheep, therefore, voided 15'097 grammes (■0332 1b.) 
in 24 hours as excrement. 
" The money value of the excrement produced ^n 24 hours 
(2377 grammes) is 0-039 of a franc (this comes to 2d. 'IS per 
week), taking as a basis for our valuation the price of guano or 
cake." 
granunes. lbs. 
Since the nitrogen in the food was .. .. 3836-009 8-42S2 
And that in the manure 2174-000 4-7828 
There remains to be accounted for .. 1662-009 3-6454 
The cost of the keep was thus estimated : — 
£. s. d 
7 cwts. of mangold, at 10s. per ton, nearly .. .. 0 3 6 
158J lbs. of oats, at 5?. 12s. per ton 0 8 0 
154 lbs. of bran, at 61. 8s. per ton 0 9 0 
83^ lbs. of straw, at 2?. per ton 0 1 6 
12 0 
The value of the manure at 4 centimes per head perl « 4. o 
day coraes to | t) 4 b 
Or about 21 per cent, of the cost of the food, 
leaving, as a charge against the sheep 0 17 4 
Since the increase in live-weight was 41-8 lbs., the cost of 
feeding is 4|e?. per lb. of live-weight gained. 
It thus appeared tliat of the nitrogen contained in the food only 
2 G 2 
