EXPERIMENT STATION BULLETINS. 199 



Bones contain 25% carbonate, etc., of lime, as sulphate 350.0 



Moisture and excess of sulphuric acid 195.0 



Total 1,768.0 



Dirt, charcoal, etc 232.0 



2,000.0 



If we take a fertilizer with one per cent, of insoluble phosphoric acid, 

 three per cent, soluble potash, and no available nitrogen, the commercial 

 value, as estimated above, would be $4.00 per ton. If it had only one tenth 

 these amounts the value would be 40 cents per ton, if estimated in the same 



^ay- 

 Farmers can easily estimate the commercial value of fertilizers by using 



these data. 



LICENSE REQUIRED. 



A license is required from each dealer who sells or offers for sale any 

 commercial fertilizer, the price of which exceeds ten dollars per ton. This 

 license must be taken out each year for each brand of fertilizer offered for 

 sale. The amount sold is not contemplated by the law. The lawful sale 

 of any amount will require a license. The license is for one year in each 

 case, commencing with the first of May. The application for a license, 

 the fee for the same ($20.00), and the specimens of fertilizers, with the 

 affidavit, should be sent to Secretary H. G. Reynolds, at the college, by the 

 1st of May each year. 



R. C. Kedzie, 



Chemist, Experiment Station, Agricultural College. 



