AGRICULTURE AND DENDROLOGY. 
33 
Year. 
No. 8. 
No. 9. 
No. 
io. 
No. 
11. 
No. 
12. 
I. 
n. 
Aver¬ 
age. 
I. 
II. 
Aver¬ 
age, 
1S82 
_ 
_ 
— 
5.0 
5.6 
5.3 
6.4 
7.68 
8.88 
1883 
— 
— 
— 
G.4 
8.8 
7.6 
9.6 
12.24 
14.04 
1884 
— 
— 
— 
7,8 
11.0 
9.4 
12.0 
13.56 
14.76 
1S85 
— 
— 
— 
6.8 
7.4 
7.1 
10.0 
13.20 
14.16 
1886 
— 
— 
— 
— 
— 
— 
10.0 
12.72 
14.40 
1887 
4.9 
4.9 
4.9 
6.6 
6.6 
6.6 
8.8 
11.52 
13.44 
From these figures we see that the fluctuations of 
prices from one year to another affected all fertilizers alike, 
and that, consequently, the scarcity of one large group 
of them at once affects the price of all the others, it being 
very likely that the smaller or larger catch of fish is the 
standard for the retail cost of the other manures. In 1882 
and 1887, high prices prevailed throughout, while 1884 and 
1885 were remarkable for the cheapness of the manures. 
The table indicates furthermore that during the spring and 
in the beginning of summer, when the demand is high, the 
manures are more expensive than in winter, when the 
growth of the crops is at rest and less manure is needed. 
In calculating the average prices of nitrogen and phos¬ 
phoric acid it is requisite to know the contents of the above 
mentioned manures in these nutrients. Numerous analyses 
which have been made in our laboratory and to which 
also Mr. Hirata has contributed, have given the following 
results : 
