16 PRACTICAL FARM CHEMISTRY. 



chlorine, magnesium, phosphorus, potassium, sili- 

 con, sodium and sulphur. Here we have all the raw 

 materials that enter into the structure of plants and 

 animals. The husbandman, as manufacturer of 

 grain, fruits, etc., will find a thorough acquaintance 

 not only with the machinery of nature which fur- 

 nishes him the motive power, but also with the 

 various raw materials of which he has to construct 

 his products, fully as indispensable to highest suc- 

 cess as the acquaintance with the various grades of 

 saccharine substances, with the dye stuffs and 

 flavoring extracts, is for the manufacturer of cane y. 

 He must learn their nature, peculiarities and modeb 

 of operation. 



