OF SEVERAL JAPANESE FERTILIZERS. 35 
The crude ash prepared by simple incineration of the 
above materials was composed as follows :— 
Potash . 
Soda . 
Oak 
leaves. 
% 
4.40 
o 21 
Pine 
leaves. 
% 
2.04 
1.74 
Grasses 
(straw). 
% 
2.80 
0.92 
Lime . 
.39.48 
28.50 
5.48 
Magnesia. 
. 7.72 
8.15 
0.31 
Ferric oxide and alumina. 
1.95 
8.57 
1.43 
Phosphoric acid. 
. 3.S8 
14.24 
1.14 
Sulphuric acid .. 
. 1.33 
2.45 
1.02 
Silica and sand . 
.32.57 
28.70 
82.60 
Chlorine* 
Carbon dioxide . 
. 1.15 
1.65 
0 
Carboi t . 
. 1.03 
1.00 
2.81 
Total ash in the air dry substance. 
4.51 
2.08 
7-80 
The ash from the pine leaves ranks accordingly first, next 
comes that from oak leaves, while the ash from the grasses 
(straw) is the poorest. 
When we review the results of the analyses on the 
preceding pages and also those contained in No. 3 of the 
Bulletins of this College, we find that there exist among 
the Japanese fertilizers many which, with due regard to 
their composition as well as copiousness, are well suited to 
supply the demand of the cultivated land for nitrogen. An 
improved and extended system of taking marine animals, a 
more extended cultivation of leguminous plants, especially 
the introduction of leguminous forage crops for the working 
animals, and the large supply of green manures from the 
uncultivated land, would render the country independent 
from without for a supply of nitrogenous fertilizers. Con- 
* Not determined. 
