452 Experiments on the Feeding of Stock. 
1st Period. 
2nd Period. 
3rd Period. 
4th Period. 
Food. 
Nitrogen. 
Food. 
Nitrogen . 
Food. 
Nitrogen. 
Food. 
Nitrogen. 
lbs. 
grammes. 
lbs. 
grammes. 
lbs. 
gi-ammes. 
lbs. 
grammes. 
Mangold 
1 on 
117 
290 
237 ' 5 
779 
.562 
1 7^ 
I/O 
118 
1144 
59 
426-5 
159 
1203 
53 
411-5 
65 
701-5 
145 
1601 
35 
376 
60 
346-3 
85 
470 
2 
U-5 
Total .. .. 
1161 
1711-8 
3826 
925 
Excrements .. 
835 
986-3 
2174 
457-6 
Difference (3 sheep) 
326 
Difference for 2 sheep 
218 
725-5 
1662 
467-4 
To leave no doubt on this point, M. Reiset renewed his direct 
experiments, and found that a stock ewe expired daily 5*4 
grammes of nitrogen, and a store wether 4-3 grammes. 
M. Boussingault * has put on record that a horse exhaled 23 
grammes, a cow 27 grammes per day, and a pig of 9 months 
4-4 grammes. 
M. Barral,! pursuing Boussingault's method with three different 
sheep for 4 or 5 days, found that they severally exhaled 2 "89 
grammes, 9"38 grammes, and 6-19 grammes of nitrogen in 24 
hours. 
M. Reiset thus sums up his experiments : — 
" Of 100 parts of nitrogen put into circulation by the food — 
58-3 is recovered in the excreta. 
IS'T is recovered in the meat, tallow, and skin. 
28-0 is lost by respiration. 
100-0 " 
The money value of the manure per head per day was — » 
Centimes. 
1st Period 1-8 
2nd Period 3-4 
3rd Period 3-9 
4th Period 3-3 
or, on tlie average of the three last periods, 3"6 centimes (nearly 
2d.) per week. 
The excrements contained from 67 to 85 per cent, of water. 
M. Reiset does not pretend to be able to combine a scientific 
experiment with the greatest possible economy of production ; 
* 'Eeonomie Rurale,' 2iid edition, vol. ii. p. 383. 
f 'Statique Cheiniiiue des Auimaux ' (1850), p. 311. 
