12 
IMPERIAL COLLEGE OE 
Second Trial. 
original 
Fermented night-soil. 
Night- 
soil, 
April 
24th. 
May 8 th, 
after 
2 weeks. 
May 
15th, 
after 
3 weeks. 
May 
29th, 
after 
5 weeks. 
J une 
12th, 
after 
7 weeks. 
July 9th, 
after 
11 weeks. 
Nitrogen. 
7.97 
7.62 
7.56 
7.28 
7.05 
6.73 
Chlorine. 
5.86 
5.88 
5.94 
5.99 
6.02 
6.05 
Loss from 1000 c.c. of 
original dung : 
Water . 
3.4 
13.2 
21.7 
26.5 
• 31.4 
Nitrogen. 
— 
0.369 
0.504 
0.842 
1.109 
1.607 
Loss of nitrogen, per 
cent of the nitrogen 
applied . 
— 
4.63 
6.32 
10.57 
13.92 
20.17 
Third Trial. 
Original 
Fermented night-soil- 
night-soil, 
July 6th. 
July 23rd, 
after 2 weeks. 
August 13th, 
after 5 weeks. 
Nitrogen . 
722 
695 
6.46 
Chlorine . 
5.62 
5.70 
5.76 
Loss from 1000 c.c. of 
original dung : 
Water . 
— 
14.4 
24.3 
Nitrogen . 
— 
0.367 
0.916 
Loss of nitrogen, per cent of 
the nitrogen applied .. .. 
■ - 
5.09 
12.70 
These results show plainly that the quantity of am¬ 
monia which evaporates at and after the putrefaction and 
fermentation of human excreta, while storing them, is not 
