Sulphate of Ammonia, Dry Ground Fish, 



Nitrate of 8oda, Azotin, 



Muriate of Potash, Ammonite, 



Sulphate of Potash, Castor Pomace, 



Dried Blood, Bone and Tankage, 



Dried Ground Meat, Plain Superphosphates. 



A large percentage of commercial materials consists of refuse 

 matter from various industries. The composition of these substances 

 depends on the mode of mamifacture carried on. The rapid progress 

 in our manufacturing industries is liable to- affect at any time, more 

 or less seriously, the composition of the refuse. To assist the farm- 

 ing community in a clear and intelligent appreciation of the various 

 substances sold for manurial purposes, a frequent examination into 

 the temporary characters of agricultural chemicals and refuse mate- 

 rials offered in our markets for manurial purposes is constantly 

 carried on at the laboratory of the station. 



Consumers of commercial manurial substances do well to buy 

 whenever practicable, on guarantee of composition with reference to 

 their essential constituents ; and to see to it that the bill of sale 

 recognizes that point of the bargain. Any mistake or misunder- 

 standing in the transaction may be readily adjusted, in that case, 

 between the contending parties. The responsibility of the dealer 

 ends with furnishing an article, corresponding in its composition with 

 the lowest stated quantity of each specified essential constituent. 

 Our present laws for the regulation of the trade in Commercial 

 Fertilizers include not only the various brands of compound fertili- 

 zers, but also all materials single or compound without reference to 

 source, used for manurial purposes when offered for sale in our 

 market at ten dollars or more per ton. 



Copies of our present laws for the regulation of the trade in 

 Commercial Fertilizers may be had by all interested on application, 

 at the Massacluisetts State Agricultural Experiment Station, Am- 

 herst, Mass. 



INSTRUCTIONS TO 



MANUFACTURERS, IMPORTERS, AGENTS AND SELLERS 



OF COMMERCIAL FERTILIZERS OR 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 : 



