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CONTENTS. 



BOOK VL 



OF MINERAL SUBSTANCES, AND THE STRUCTURE OF 

 THE EARTH. 



CHAP. I. page i. 



Of Salts in general. 



Introductory Obfervations. Definition of Salts, Salts Jimple and 

 compound, What are called Jimple Salts are in reality compound Bo- 

 dies. Oxygenous Principle. 



CHAP. II. 

 Alkalies. page 5. 



Mineral fixed Alkali ; 'where found. Vegetable fixed Alkali ; how ob- 

 tained. Uje of the fixed Alkalies in the Arts. Ufe of Alkalis in 

 making Glafs. Procefs cf making Soap. Volatile Alkali; hovj ob- 

 tained; a compound Body. Alkaline Air. 



CHAP. III. page 10. 



Acids. 



Of Acids In general.* Vitriolic Acid; honu obtained, &c. -Nitrous 

 Acid; how obtained. Muriatic Acid; how obtained, and its Ufe in 

 the Arts. Flour Acid; diffolves Glafs; employed to make Etchings 

 on Glafs. Acid of Borax. Phofphoric Acid. Acid ofAmbtr. 



CHAP. IV. page 20. 



Neutral Saks. 



he Union of an Acid and Alkali dejlroys the corrcfive Quality of each. 

 Neutral Salts do not communicate the f aline Quality to other Bodies. 

 Crystalline Form ; hovj decompo/ed. 



A z CHAP, 



857811 



