AGRICULTURE AND DENDROLOGY. 
11 
ventilation. Salnples were then taken from time to time 
after a vigorous stirring of the fermenting dung ; about 3 
liters were transferred from the centre of the vessel into a 
capacious bottle in which the mass was strongly shaken 
until no lumps, however small, could any longer be 
perceived. The specimens for the analyses were then 
at once measured. For the nitrogen determination 50 c.c. 
of the dung were oxydized according to the method of 
Kjeldahl and diluted with water, from which solution 1 / 10 was 
taken, after cooling, for the distillation of the ammonia. 
The chlorine was estimated in the gravimetric way accord¬ 
ing to Neubauer’s method. The entire analytical work was 
performed in these researches by Mr. Y. Mori. 
To ascertain whether the temperature has any in¬ 
fluence on the loss of ammoira, we carried out 3 such 
trials, in winter, in spring, and in the hot season (July 
and August). There was found in grams per 1000 c.c. of 
the dung :— 
First Trial. 
Original 
Fermented night-soil. 
night-soil 
Febr. 20th. 
February 27th, 
after 1 week. 
March 11th, 
after 3 weeks. 
Nitrogen . 
7.90 
7.76 
7.55 
Chlorine . 
6.05 
6.11 
6.16 
Loss from 1000 c.c. of 
original dung : 
o o 
Water . 
— 
8.2 
16 2 
Nitrogen . 
— 
0.204 
0.472 
Loss of nitrogen, per cent of 
the nitrogen applied .. .. 
- - 
2.58 
5.98 
