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TABLE IV. ANALYSES OF COTTONSEED MEAL-Continued.
II. RAW MATERIALS CHIEFLY VALUABLE FOR
RAW ROCK PHOSPHATE.
Only one sample was analyzed.
Sold by W. L. Mitchell, New Haven, and sampled by the Station agent from stock of H. O. Daniels, Middletown.
It was guaranteed to contain 28 per cent of total phosphoric acid and 30.95 per cent was found.
PRECIPITATED BONE PHOSPHATE.
The bone phosphate of commerce is obtained as a by-product in the manufacture of gelatin and consists largely of dicalcium phosphate. The phosphoric acid in this material is practically all "available."
Four samples were analyzed, all of which exceeded their guaranties. At the price quoted, available phosphoric acid has cost 6.3 cents per pound. The ton price was $50.00.
Analyses are given in Table VI.
DISSOLVED ROCK PHOSPHATE OR ACID PHOSPHATE.
This material is the product made by treating raw rock phosphate with sulphuric acid whereby the phosphorus is largely converted into "available" forms. In acid phosphates most of the available phosphoric acid is soluble in water.
The prevailing guaranty is 16 per cent of "available" phosphoric acid, and this amount was exceeded in all of the twenty samples examined.
As regards "available" phosphoric acid this material has varied in composition within the limits of about 50 pounds per ton. The price, however, has ranged from $14.00 to $30,00 and the cost per pound of available phosphoric acid has accordingly varied from 4.2 to 9.2 cents. On the average, acid phosphate this year has contained 16.78 per cent of available phosphoric acid, which at the average price ($21.11) per ton has made the cost of this constituent 6.3 cents per pound, or $1.26 per unit.
Analyses are given in Table VII.
23064 American Agricultural Chemical Co.,
23184 Apothecaries Hall Co., Waterbury.
99 International Agricultural Corpora-
22936 Olds & Whipple, Inc., Hartford.
23194 Virginia-Carolina Chemical Co., New
23196 Wilcox Fertilizer Co., Mystic.
Sampled by Purchaser: 22230 E. D. Chittenden Co., Bridgeport.. 23139 The L. T. Frisbie Co., New Haven..
C. F. Allen, Warehouse Point.
Sampled at Factory....
E. O. Chapman, North Haven.
A. B. Lapsly, Pomfret Center.
16.83 16.68 16.00 23064 1.38 17.68 16.30 16.00 23184