APPENDIX. 



635 



DOM.V. 



VI. 



VII. 



VIII. 



IX. 



X. 



XL 



XII. 



XIII. 



XIV. 



XV. 



XVI. 



XVII. 



XVIII. 



XIX. 



XX. 



IRON. 



TIN. 



LEAD. 



MERCURY. 



ZINC. 



ANTIMONY. 



ARSENIC. 



BISMUTH. 



COBALT. 



NICKEL. 



MANGANESE. 



MOLYBDEtfA. 



TITAN*. 



CHROME. 



SCHEELE. 



URANIUM, &c.&c. 



Dr. Thomson observes that all 

 metals are found in the following 

 states: 1. Metallic, either alone 

 or combined. 2. Combined with 

 sulphur. 3. Oxyds, that is, united 

 with oxygen. 4i Combined with 

 acids. Each order therefore, as 

 he adds, may be divided into the 

 four following Genera. 



1. Alloys. 3. Oxyds. 



2. Sulphurets. 4. Salts. 



But Haiiy has, on the contrary, 

 considered 'each metal as a ge- 

 nus; and Werner, an excellent 

 judge of metallogy in particular, 

 considers each metal as a genus, 

 and the various combinations as 

 species. 



But as Mode chiefly implies 

 the mode of chemical combina- 

 tion, it is evident that these pre- 

 tended genera and species, which 

 are wholly vague as being dcriv ed 

 from an analo ry merely im agi- 

 nary between inert and animated 

 nature, are most properly and 

 peculiarly Modes. The Aspects 

 are equally applicable as in Petra- 

 logy and Lithology. 'the Struc- 

 ture is also applicable to the com- 

 position in general; as in struc- 



* Another name would be prefer- 

 able. Jn the Greek titan is lime. 



tura verborum it is classically ap- 

 plied to very small objects*. 



METALLOGY. 



DOMAIN I. 



GOLD. 



NOME L ALLOYS. 



MODE I. Pure, or rather en- 

 tire, for it always contains 

 silver or copper. 



STRUCTURE I. Massive. 

 Diversities, 1. in rocks; 2. in 

 pepitos, or detached masses found 

 in clay or sand, &c. 



STRUCTURE II. Disseminated 

 in rocks, sands, &c. 



STRUCTURE III. Crystallised. 



Aspect 1. In cubes, or other 

 regular forms. 



Aspect 2. Dendritic, like 

 branches, leaves, &c. 



STRUCTURE IV. Earthy, of a 

 brownish red, like Spanish 

 snuff. 



MODE II. Electrum, or 

 greatly alloyed with silver. 



STRUCTURE I. Compact. 

 Dendritic. 



MODE III. Alloyed with an- 

 timony. 



MODE IV. Alloyed with the 

 Sylvanite of Kirwan, so call- 

 ed from Transylvania, where 

 it is found ; the Tellurium 

 of Klaproth : but Kirwan' s 

 appellation is received by 

 Werner. 



* See Linn. p. 14 (as already quoted), 

 where he says the natural knowledge 

 of stones arises from their structure, 

 the chemical from analysis. 



