MENACANE, AND ITS ORES. 129 



contains have been so fully developed, and satisfactoriljr 

 ascertained, by the united exertions of Kirwan, Klaproth, 

 Vauquelin, and Lampadias, that little is left to wish for, so 

 far as the chemical characters are concerned. As an object 

 of natural history, it has, as yet, been little attended to. It- 

 is therefore hoped, the following attempt, to supply in some^ 

 measure that deficiency, so far as the present data allow it, 

 will prove acceptable to the naturalist. It is scarcely neces- 

 sary to observe, that I follow Werner's method most ex- 

 actly : as it is to him that we are indebted for the successful 

 vindication of Mineralogy, as an independent province in. 

 the fcederal state of natural history; and which acknow- 

 ledges, in Chemistry, the powerful and indispensable ally, 

 not the imperious and arbitrary law-giver. 



Of the genus Menac we are already acquainted with five Five species, 

 species or ores. It is, however sufficiently probable, that 

 several new species will, at no distant period, be added to 

 the list ; and that this metal is more widely distributed, and 

 more generally diffused, and plays, perhaps, a more impor- 

 tant part, than is at present suspected. 



MENAC, GENUS. 



3. Nigrine. 

 Tribe of Menacane..-^ 4. Menacane, 

 Iserine, 



{t 



FIRST SPECIES, 

 RUTILE*. 



Titanite of Kirwan. Rutile. 



Rutil of Werner. 

 Sagenite of Saussure. 



EXTERNAL CHARACTERS. 



The colour varies from light hyacinth to dark brownish External cha- 

 red. Is found crystallized. 1. In right angled four-sided "*^^^'"^' 



* Probably the anatase of Hauy is a variety of Rutile — R. J. 

 Vol. XVI.— Feb. 1807. N prisms, 



