18 BULLETIN OF THE BUSSEY INSTITUTION. 
Twenty-five cents per pound may be allowed for the nitrogen in 
tankings and in bone-meal. 
Twenty cents per pound may be allowed for the nitrogen of unknown 
quality concealed in the superphosphates. Nitrogen of fair quality 
can, in fact, be bought in this vicinity for much less money than this 
in the form of unground fish-pomace, as will be shown directly. 
Calculating from these data the approximate values of the samples 
of fertilizers analyzed, we obtain the following table ;—_ 
No. of the sample. Calculated value per ton. Price charged per ton. 
I. $29 —30 $55 
iL 23 -—25 55 
III. 344 - 363 50 
IV. About 44 50 
V. 41 —43 60 
VI. / 37 -383 60 
VII. About 44 60 
VIII. 204 — 22 60 
1D.¢ 334 — 344 60 
X, 39 -40 60 
XI. About 48 50 
SAE 50 
xi * 40 -45 60 
XIV. 50 
XV. 32 — 
AVI. 30 30 
XVII. 68 : € 70 
XVIII+ | 63 | me 
XIX.+ 30 — 
XX.t 39 — 
XXL+ 854-389 _ 
XXIL 364-39 40 
XXIV. (See beyond.) 34 -35 15 
The estimates of the value of the pound of nitrogen given above, 
and particularly those relating to the nitrogen contained in tankings 
* Good bone-meal contains on the average 22 per cent of phosphoric acid and 
3.8 per cent of nitrogen. Hence the value of the samples analyzed may be taken at 
from $40 to $45, as above. 
t The samples marked with a dagger were experimental products. They were 
not for sale. | 
