EXPERIMENT STATION BULLETINS. 



293 



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 a ton. If it had only one-tenth 

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

 way. 



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 a 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), 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. 



Fertilizers in Michigan for 1891. 



Composition of Fertilizers as Claimed by Manufacturer and as Found on Chemical Analysis. 



Percentage Estimation. 



