760 



ANNUAL REPORT. OF THE 



Off. Doc. 



Composition of Raw Materials. — In order to form a correct idea 

 of the cost per pound of tlie fertilizer constituents of these ma- 

 terials, it is needful to determine their composition or, in other 

 words, the quantities of valuable constituents each contains. The 

 following table shows the composition of the raw mateiials used 

 in the manufacture of fertilizers. Very few analyses of these 

 materials, with the exception of ground bone and dissolved rock, 

 have been made in Pennsylvania. The figures in the following 

 table include the averages of the results of analyses made in Con- 

 necticut, Massachusetts, New Jersey and Pennsylvania 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.) 



o 

 09 



o 

 a 

 a 



CQ 



o 



fi 

 p. 



O 

 Eh 



Sulfate of ammonia 



Nitrate of soda 



Dried blood 



Ground bone 



Tankage 



Ground fish 



Cotton-seed meal 



Castor pomace, 



Sulfate of potash, high grade, 



Muriate of potash, 



Kainit 



Double sulfate of potash and magnesia, 



1.90 

 1.00 

 49.09 

 50.44 

 12.72 

 26.98 



22.92 



14.20 

 6.72 

 3.15 

 1.90 



Composition of Acidulated Fertilizer Ingredients. (Per cent.) 



o 

 Si 

 a 



CO 



o 

 Si 

 a 





•Also contains 2.62 per cent, nitrogen. 



These figures indicate no great change in the composition of the 

 raw materials used in fertilizer manufacture. 



Cost per Pound of Fertilizer Constituents. — With the composition 

 of these raw materials and their price per ton, hundred weight, or 

 other unit of measure as a basis, the wholesale cost per pound of 

 the valuable constituents can be readily calculated. In many cases 

 the amraoniates are quoted ''per unit of ammonia," the term unit 



