999 REport oF THE CHEMIST OF THE 
(3) Available Phosphoric Acid. The 482 brands of complete 
fertilizers contained available phosphoric acid varying in amount 
from 1.20 to 15.12 per ct. and averaging 8.76 per ct. The aver- 
age amount of available phosphoric acid found by the Station 
analysis exceeded the average guaranteed amount by 0.98 per ct., 
the guaranteed average being 7.78 per ct. and the average found 
being 8.76 per ct. 
In 418 brands of complete fertilizers, the amount of available 
phosphoric acid found was equal to or above the amount guaran- 
teed, the excess varying from 0.03 to 6.32 per ct. and averaging 
1.23 per ct. 
In 64 brands, the available phosphoric acid was below the guar- 
anteed amount, the deficiency varying from 0.02 to 3.68 per ct. 
and averaging 0.46 per ct. In 44 cases the deficiency was below 
0.5 per ct. 
The amount of water-soluble phosphoric acid varied from 0 to 
10.28 per ct. and averaged 5.40 per ct. 
(4) Potash. The complete fertilizers contained potash varying 
in amount from 0.48 to 12.95 per ct. and averaging 4.86 per ct. 
The average amount of potash found by the Station analysis ex- 
ceeded the average guaranteed amount by 0.30 per ct., the guar- 
anteed average being 4.56 per ct. and the average found being 
4.86 per ct. 
In 331 brands of complete fertilizers, the amount of potash 
found was equal to or above the guaranteed amount, the excess 
varying from 0.01 to 3.07 per ct. and averaging 0.59 per ct. 
In 151 brands, the potash was below the guaranteed amount, 
the deficiency varying from 0.01 to 4.36 per ct. and averaging 
0.50 per ct. In 105 of these cases, the deficiency was less than 
0.5 per ct. 
In 85 cases among the 482 brands of complete fertilizers the 
potash was contained in the form of sulphate free from an excess 
of chlorides. 
(5) The retail selling price of the complete fertilizers varied 
fmom $17 to $45 a ton and averaged $26.66. The retail cost of 
