28 
RESEARCHES ON THE COMPOSITION 
Alumina . 
In the fresh substance. 
. 1.42 
Ill 100 p, 
3.85 
Phosphoric acid ... 
. 0.92 
2.49 
Carbon dioxide. 
. 3.67 
9.94 
Silica and sand ... 
. 17.98 
48.72 
Chlorine . 
0.02 
0.06 
As these figures show, the indigo residues have only a 
low manorial value ; they chiefly consist of a sandy mass 
containing a considerable quantity of calcium carbonate 
but only very little of nitrogen, phosphoric acid, and potash, 
and will act chiefly as an indirect manure by their content 
of lime. 
The percentage of water in the residues is subjected to 
variations, we found in the 5 specimens a minimum of 
87.3, a maximum of 57.9°/ 0 of moisture. 
XII. Astragalus lotoides, a Green Manure. 
This plant, known in the country as (tenge, grows 
spontaneously on paddy land in many places, covering the 
whole area of the fields and flowering at the time when the 
farmers commence to prepare the latter for the cultivation 
of rice. A specimen of the plant cut in blossom and dried 
in the air was sent to us from Gifu prefecture and analyzed 
by Mr. Y. Mori. It had the following composition : 
Per mille, fresh substance. Per cent, dry matter. 
Water . 820 — 
Crude Protein. 
30.26 
16.81 
,, fat . 
10.89 
6.05 
,, fibre . 
56.92 
31.62 
Nitrogenfree extract . 
72.14 
40.08 
Ash, free from CCP and sand 
9.79 
5.44 
Total nitrogen. 
4.S4 
2.689 
Albuminoid nitrogen . 
3.85 
2.410 
