EXPERIMENT STATION BULLETINS. 191 



materials found in the results of analysis. One per cent means 20 pounds 

 in a ton, and if the material is worth 5 cents a pound, then each per 

 cent equals $1.00 for a ton. 



The prices here given would represent the wholesale price of the mate- 

 rials bought in eastern markets, such as New York or Baltimore. This 

 does not include the freight from those points or the cost of mixing, sift- 

 ing and sacking, which would amount to $3.00 to $5.00 a ton. 



I must again remind the reader that this trade valuation is not the 

 agricultural value, but it may afford a means of comparing the trade 

 value of different brands of fertilizers. 



This Bulletin is submitted to the farmers of our State in hope that 

 it may aid them to a better understanding of a somewhat complicated 

 subject, yet one of great importance. 



Most of the analyses for this Bulletin have been made by Mr. Thorn 

 Smith, B. S., Assistant in Experiment Station. 



R. C. KEDZIE, 

 Chemist of Experiment Station. 



Agricultural College, July 8, 1897. 



