table matter, unless the contrary is ascertained. The insoluble 

 phosphoric acid is valued in this connection at two cents. 



The above trade values are the figures at which in the six months 

 preceding March, 1894, the respective ingredients could be bought 

 at retail for cash in our large markets, in the raw 'materials, which are 

 the regular source of supply. 



They also correspond to the average wholesale prices for the six 

 months ending March 1st, plus about 20 per cent, in case of goods 

 for which we have wholesale quotations. The valuations obtained 

 by use of the above figures will be found to agree fairly with the 

 retail price at the large markets of standard raw materials, such as : 

 Sulphate of Ammonia, Dry Ground Fish, 



Nitrate of Soda, 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 manufacture carried on. The rapid progress 

 in our manufacturing industiies 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 tiade 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 

 markei at ten dollars or more per ton. 



