^5 



III. 



INSTRUCTIONS TO MANUFACTURERS, IMPORTERS, 



AGENTS AND SELLERS OF COMMERCIAL 



FERTILIZERS AND MATERIALS USED 



FOR MANURIAL PURPOSES IN 



MASSACHUSETTS. 



1. An application for a certificate of compliance with the regula- 

 tions of the trade in commercial fertilizers and materials used for 

 manurial purposes in this state must be accompanied : 



Firsts with a distinct statement of the name of each brand 

 offered for sale, the name of the manufacturer and place of 

 factory. 



Sciond, with a statement of the amount of phosphoric acid, of 

 nitrogen and of potassium oxide guaranteed in each dis- 

 tinct brand. 



The statement of the percentage of phosphoric acid should in- 

 clude its several forms when present as follows : Soluble 

 in distilled scaler, a//d reTerfed, as 7vell as total pJiosphoric 

 acid. The potash should be guaranteed as potassium 

 oxide, and not as sulphate or muriate, although the source 

 from which the potassium oxide is derived may be men- 

 tioned on the tag or stencil. 



In all cases the guaranteed percentage of nitrogen should be 

 stated. The ammonia equivalent of nitrogen maybe stated 

 at the option of the manufacturer.* 



IViiid, with the fee charged by the State for a certificate, which 

 is five dollars for each of the following articles : nitrogen, 

 phosphoric acid and potassium oxide guaranteed in any 

 distinct brand. 



2. The obligation to secure a certificate applies not only to com- 

 pound fertilizers, but to all substances, single or compound, used for 

 manurial purposes offered for sale in this State. 



3. The certificate of compliance with our State laws must be se- 

 cured annually before the first of May. 



* To reduce ammonia to nitro'^en, multiply the per cent, of ammonia by 14 and divide 

 that product by 17 (or multiply the per cent, of ammonia by the factor .824). 



