TREATISE 



MINERALOGY, 



OR THE 



NATURAL HISTORY OF THE MINERAL KINGDOM. 



BY 



FREDERICK MOHS, 



PROFESSOR IN THE MINING ACADEMY OF FREIBERG. 



Translated from the German, with considerable Additions, 



BY 



WILLIAM HAIDINGER, F.R.S.E. 



VOL. III. 

 UNIVERSITY 



OF 



R\AM^ r 



EDINBURGH : 



PRINTED FOR ARCHIBALD CONSTABLE AND CO. EDINBURGH 

 AND HURST, ROBINSON, AND CO. LONDON. 

 1825. 



