AGRICULTURE AND DENDROLOGY. 
31 
erals, or guano, bave not yet been discovered within easy 
reach of this country, the ratio will be a little more narrow. 
Hence we may take it to be 1 : 2.5 in all ordinary vege¬ 
table and animal fertilizers, such as brans, oilcakes, refuse 
materials from the manufacture of sake, alcohol, shoyu and 
tofu, and in the coarse hsh manure.—The price of the potash 
can be approximately determined on account of the trade 
value of the straw ashes, of which TOO kuwamme cost in 
Tokyo with slight variations about 3 Yen, and which con¬ 
tain, on an average of several analyses, 8.13 °/„ of potash and 
1.06 °/ n of phosphoric acid. As according to our subsequent 
researches 1 kuwamme of the latter ingredient has the average 
value of 0.608 Yen, a simple calculation shows that the 
same unit of potash is worth 0.290 Yen. 
With the help of the above ratio for the relative value 
of phosphoric acid and the price of potash it will be possible 
to calculate how much is generally paid in Tokyo for nitro¬ 
gen and phosphoric acid, provided that we know the prices 
of commercial fertilizers with sufficient accuracy. Infor¬ 
mation on this latter subject has been communicated to me 
by Mr. K. Jfirata, who compiled from a magazine (Tokyo- 
Keizai-Zasshi) the prices paid in Tokyo during the last 7 
years (1882-87) for the following materials : 
No. 
General name. 
Special name in the 
Tokyo market. 
English. 
Japanese. 
1 
Dried herrings. 
Shime kasu. 
Uchi nmi kasu. 
2 
55 
55 
Sendai „ 
3 
5> 
55 
Isomura „ 
4 
55 
55 
Hachinobe „ 
5 
55 
55 
Tarumai „ 
6 
15 
55 
Koshinaga „ 
7 
Dried sardines. 
5* 
Ni shin „ 
8 
55 
55 
Atsugishi konisliiu „ 
9 
Dried herrings. 
Hoshika. 
Honba hoshika. 
10 
Rape cake. 
Tane kasu. 
Tane kasu. 
11 
Rice bran. 
Nuka. 
Zomei. 
12 
75 55 
55 
Hachiken. 
