from the observed analogies of the bodies with 

 those whose molecular weight admits of proof. The 

 molecular weight of a compound is the sum of the 

 atomic weights. 



THE INORGANIC COMPOUNDS. 



The inorganic elements and officinal compounds 

 may be classified as follows: 



(Compounds to be classed under the metallic or 

 basic elements.) 



The Inorganic Bases. 



ALKALIES: Potassium; Sodium; Lithium; Am- 

 monium. 



ALKALINE EARTHS: Barium; Calcium; Magne- 

 sium; (Strontium). 



ARSENIC GROUP: Arsenic; Antimony; Bismuth. 



UNGROUPED: Zinc; Lead; Silver; Gold; Platinum; 

 (Copper and Mercury); (Iron; Manganese and 

 Chromium); Aluminium; Cerium. 



Non-metallic Elements. 



HALOGENS: Chlorine; Bromine; Iodine. 

 UNGROUPED: Hydrogen; Nitrogen; Oxygen 

 Sulphur; Phosphorus; Carbon; Boron; Silicon. 



The Inorganic Acids. 



Hydrochloric; Hydrobromic; Nitric; Nitro-hydro- 

 chloric; Sulphuric; Sulphurous; Phosphoric; Boric; 

 Arsenious; Chromic. 



CHEMICAL EQUATIONS. 



Illustrating the manufacture of some of the most 

 important inorganic acids and salts. 



34 



