No, 7. 



DEPARTMENT OF AGRICULTURE. 



751 



being equivalent to per cent.; in goods sold by the ton of 2,000 lbs., 

 the unit is equal to 20 tbs., and 20 lbs., of ammonia contain 16.47 lbs. 

 of nitrogen. 



In the case of refuse bone-black, unacidulated, the mean, 28.25 

 per cent, of phosphoric acid, is assumed to represent the average 

 material on the market. 



Phosphate rock is sold by the ton of 2,240 lbs., and on the basis 

 of the bone phosphate of lime it contains, with drawbacks for in- 

 jurious constituents. Bone-phosphate of lime contains 45.8 per 

 cent, of phosphoric acid; therefore, each per cent, of bone-phosphate 

 in a long ton is equivalent to 22.4 lbs. and contains 10.26 lbs. of 

 phosphoric acid. 



In the wholesale trade, dried blood, azotine, concentrated tankage 

 and hoof meals are usually sold on the basis of ammonia, disregard- 

 ing the phosphoric acid present. 



Insoluble phosphoric acid in dissolved rock is likewise omitted 

 from consideration, contracts being based solely upon the "avail- 

 able" phosphoric acid; nor in rock phosphates is any claim made 

 for the small quantities of nitrogen and potash they contain, nor in 

 dissolved bone for the potash present. 



Under these conditions, the wholesale cost per pound in New 

 York of the valuable constituents of such materials as furnish but 

 a single fertilizing element, these materials being assumed to be 

 in the state of preparation and in the packing in which the manu- 

 facturer purchased them, are given in the following table; also, a 

 figure representing a fair retail price at the factory, the materials 

 having undergone no change in treatment or packing and the allow- 

 ance for expense and profit in retailing being 20 per cent. 



Wholesale Cost Per Pound of Fertilizer Constituents (New York). 

 I. Ingredients Supplying One Constituent. 



Material. 



c 

 o 

 o 



o 



J3 



3 



P. 



o 



C 



So 



Sulfate of ammonia 



Nitrate of soda 



Dried blood, high grade 



Concentrated tankage, 



Refuse bone black , 



Phosphate rock:* 



Tennessee, 78 per cent., 



South Carolina, 60 per cent.. 



Acid phosphate 



Double manure salts 



Sulfate of potash 



Muriate of potash 



Kainit 



Nitrogen 



Nitrogen 



Nitrogen 



Nitrogen, 



Phosphoric acid,, total, 



Phosphoric acid, total , 



Phosphoric acid, total, 



Phosphoric acid, available, 



Potash, 



Potash 



Potash 



Potash 



15.10 

 13.80 

 15.58 

 13.4 

 3.31 



.484 

 .53 

 3.19 

 4.25 

 4.31 

 3.60 

 3.26 



18.12 

 16.56 

 18.70 

 16.08 

 3.97 



.581 

 .636 

 3.83 

 5.10 

 5.17 

 4.32 

 3.91 



*The prices of phosphate rock are f. o. b. at the respective points of shipment, not New York, 

 and are taken from the reports of the Engineering and Mining Journal. The prices for potash 

 are taken from the schedule of the syndicate. The prices for concentrated tankage are taken 

 from the reports of Thos. J. White & Co., and those of the remainder from the Oil, Paint and 

 Drug Reporter. 



