353] SCIENTIFIC MANUAL. 67 



TABLE OF ASH ELEMENTS WITH THEIR COMPOUNDS WITH 



OTHER SUBSTANCES. 

 Name. In combination with Forming. 



Chlorine.... Metals Chlorides. 



Iodine Metals Iodides. 



r Metals Sulphurets. 



Sulphur..,. J Hydrogen.... Sulphuretted Hydrogen.* 



(Oxygen Sulphuric Acid. 



Phosphorus Oxygen Phosphoric Acid. 



' f Oxygen Potash. 



" \ Chlorine Chloride of Potassium. 



.. fOx)'gen Soda. 



' \Chlorine Chloride of Sodium or > 



Common Salt. / 



f Chlorine Chloride of Calcium. 



Calcium < ^ T . 



I Oxygen. Lime. 



Magn esium Oxygen Magnesia. 



Aluminum.. Oxygen Alumina. 



Silicon Oxygen Silica. 



Iron and \.... Oxygen ( Oxides. 



Manganese) ....Sulphur I Sulphurets. 



-Called also Hydro-sulphuric Acid, 

 t Agricultural Chemistry. Johnson. 



Since plants can ti?ke up no solid matter, however finely 

 divided, all of these substances must be either in a soluble 

 condition in the soil, or readily rendered so by reagents 

 existing in the soil. As their character, and the sources 

 of each, have already been given, their further discussion 

 will be resumed under the heads of PLANT FERTILIZATION, 

 SOIL FERTILIZATION, and FERTILIZERS, 



CHAPTER IV. 



PLANT FERTILIZATION. 



There are two methods of ascertaining what elements of 

 food different plants require: 



1st. By the analysis of the plants themselves, the chem- 



