408 REportT OF THE INSPECTION WORK OF THE 
(83) Available Phosphoric Acid. The 309 brands of complete 
fertilizers contained available phosphoric acid varying in 
amount from 1.72 to 12.00 per ct., and averaging 8.62 per ct. 
The average amount of available phosphoric acid found by the 
Station analysis exceeded the average guaranteed amount by 
().91 per ct., the guaranteed average being 7.71 per ct. and the 
average found being 8.62 per ct. 
In 277 brands of complete fertilizers, the amount of available 
phosphoric acid found was equal to or above the amount guar- 
anteed, the excess varying from 0.02 to 7.32 per ct. and averaging 
1.11 per ct. 
In 32 brands, the available phosphoric acid was below the 
euaranteed amount, the deficiency varying from 0.02 to 1.50. per 
ct. and averaging 0.31 per ct. In 25 cases the deficiency was 
below 0.5 per ct. 
The amount of water-soluble phosphoric acid varied from 0 
to 9.80 per ct. and averaged 5.46 per ct. 
(4) Potash. The complete fertilizers contained potash varying 
in amount from 0.55 to 13.83 per ct., and averaging 4.67 per ct. 
The average amount of potash found by the Station analysis 
exceeded the average guaranteed amount by 0.22 per ct. the 
guaranteed average being 4.45 per.ct., and the average found 
being 4.67 per ct. ; 
In 222 brands of complete fertilizers, the amount of potash 
found was equal to or above the guaranteed amount, the excess 
varying from 0.01 to 4.04 per ct., and averaging 0.57 per ct. 
In &7 brands, the potash was below the guaranteed amount, 
the deficiency varying from 0.01 to 4.45 per ct. and averaging 
0.48 per ct. In 57 of these cases, the deficiency was less than 
0.5 per ct. 
In 50 cases among the 309 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 
from $16 to $44 a ton and averaged $26.14. The retail cost of 
the separate ingredients unmixed averaged $20.76, or $5.38 less 
than the selling price. 
