536 



ANNUAL, REPORT OF THE 



Off. Doc. 



Pennsylvania. The figures in the following table include the averages of the 

 results of analyses made in Connecticut, New Jersey and Massachusetts during 

 the past year, except in the case of ground bone and dissolved rock phosphates, 

 where Pennsylvania results alone are included. 



Composition of Non-Acidulated Fertilizer Ingredients. (Per cent.) 



Sulphate of ammonia 



Nitrate of soda, 



Dried blood 



Ground bone, 



Tankage 



Ground fish, 



Cotto.T seed meal, 



Castor pomace 



Sulphate of potash, H. G 



Muriate of potash 



Kainit 



Double sulphate of potash and magnE-sia. 



1.90 

 1.00 

 49.90 

 51.14 

 13.50 

 24.86 



21.44 



13.52 



7.15 



3.15 



1.90 



Dissolved bone blackt 3 



Dissolved bone,* U 



Dissolved rock phosphate, | S8 



16.74 

 15.09 

 15.19 



11.95 

 4,6t 

 S.97 



3.06 



4.59 

 4.52 



tl905 figures. 



*Also contains 1.90 per cent, nitrogen. 



1.73 



0.86 

 1.70 



Cost per pound of Fertilizer Constituents.— With the composition of these 

 raw materials and their price per ton, hundred weight, or other unit of meas- 

 ure as a basis, the wholesale cost per pound of the valuable constituents can 

 be readily calculated. In many cases the ammoniates' are quoted "per unit of 

 ammonia," the term unit being equivalent to per cent.; in goods sold by the 

 ton of 2,000 lbs., the unit is equal to 20 lbs., and 20 lbs. of ammonia contain 16 47 

 lbs. of nitrogen. 



In the case of refuse bone-black, unacidulated, the mean, 2S.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 injurious 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 wholseale trade, dried blood, azotine, concentrated tankage and hoof 

 meals are usually sold on the basis of ammonia, disregarding the phosphoric 

 acid present. 



Insoluble phosphoric acid in dissolved rock is likewise omitted from consid- 

 eration, contracts being based solely upon the "available" phosphoric acid; nor 

 m rock phosphates is any claim made for the small quantities of nitrogen and 

 potash they contain, nor in dissolved bone for the potash present. 



