EXPERIMENT STATION BULLETINS. 453 



FERTILIZER ANALYSES 



Bulletin No. 278. 



ANDREW J. PATTEN, E. F. BERGER, A. E. SMOLL AND E. A. DeWINDT. 



The inspection and analyses of commercial fertilizers offered for sale 

 in Michigan are made nnder anthority of an act of the Legislature ap- 

 proved March 10th, 1885, and as amended during the session of the 

 Legislature for the year 1913. The principal points in the law of in- 

 terest to manufacturer, dealer and consumer may be summarized as 

 follows : 



MANUFACTURER. 



Materials subject to license. The term "commercial fertilizer" shall 

 be held to include any and every substance, imported, manufactured, 

 prepared or sold for fertilizing or manurial purposes, the retail price 

 of which is ten dollars or more per ton. (Sec. 1.) 



Statement of analysis. Before any commercial fertilizer can be 

 legally sold or offered for sale in the State the net weight of the pack- 

 age, the name of the brand and name and address of the manufacturer 

 must be printed on the bag or on a card attached to the bag together 

 with the guaranteed analysis in the following form : 



Nitrogen % 



Available Phosphoric Acid % 



Total Phosphoric Acid % 



Potash (K2O) % 



No other form stating the guarantee is permissible. The attention of 

 manufacturers who use the sliding guarantees and the equivalent guar- 

 antees is particularly called to the above form of stating the guaranteed 

 analysis. (Sec. 1.) 



Registration. Before any commercial fertilizer is sold or offered for 

 sale, the party selling or offering the same for sale shall file with the 

 Chemist of the Experiment Station a certified copy of the analysis and 

 also a sealed glass jar containing not less than two pounds of such 

 fertilizer, with an affidavit that it is a fair sample of the article to be 

 sold or offered for sale. Registration blanks for this purpose will be 

 furnished on application. . Registrations must be made on all brands 

 each year but samples are required only at the time of the first regis- 

 tration. It is the ruling of this Department that any change in the 

 brand name or in the guarantee constitutes a new brand. (Sec. 2.) 



License fee. A license fee of twenty dollars for each brand of fertilizer 

 sold or offered for sale should be paid on or before May 1st of each 

 year or before the fertilizer is offered for sale in the State. All checks 



