274 



On Chemical Tests. 



xxir. METHOD of examining a mineral, or compound substance, 



CONSISTING ONLY OF A BASE COMBINED WITH AN ACID ; OR OF A METAL 

 COMBINED WITH A NON METALLIC BODY; ITS CONSTITUENTS BEING AMONG 

 THE FOLLOWING SUBSTANCES. 



1 Potash 



2 Soda 



3 Ammonia 



4 Baiytes 



5 Strontian 



6 Lime 



7 Magnesia 



8 Alumina 



9 Protoxide of manganese 



10 Oxide of zinc 



11 Oxide of cobalt 



12 Oxide of nickel 



13 Protoxide of iron 



BASES, 



14 Peroxide of iron 



15 Oxide of c admium 



16 Protoxide of lead 



17 Oxide of bismuth 



18 Deutoxide of copper 



19 Oxide of silver 



20 Protoxide of mercury 



21 Peroxide of mercury 



22 Oxide of gold 



23 Protoxide of tin 



24 Peroxide of tin 



25 Protoxide of antimony 



ACIDS, AND NON-METALLIC BODIES. 



1 Sulphuric acid 4 Arsenic acid 



2 Nitric acid 5 Boracic acid 



3 Phosphoric acid (> Carbonic acid 



7 Chlorine ] 



8 Fluorine I combined with a metal of the above named bases, 



9 Sulphur J 



TO DISCOVER THE BASE OR METAL. 



xxiii. Reduce the mineral or substance to powder, and treat it first 

 Tri ill distilled water, and the remainder with dilute muriatic acid, assist- 

 ed by heat if neees-ary.* If it be a sulphuref, or if it contain silver, 

 mercury, or lend, dilute nitric acid must be used instead of muriatic acid ; 

 for muriatie acid combines with silver, mercury, and lead, and produces 

 an insoluble powder. The foregoing metals and bases may be dissolved 

 by this process, but Quartz, Hint, silex, and such like hard stony matter 

 cannot be, nor can the sulphates of barytes, sirontian, lime, and lead. 



« 



* The water may be tested fust, and afterwards the acid solution, or both may be mix- 

 ed together. 



