858 Professor Necker on Mineralogy consider-ed 



Order XII.— CARBONIDEOUS. 



Chenu Nat. — Carbonates. 



Soluble, with etFervescence, in acids, cold or warm ; (sometimes the mine- 

 ral must be reduced to powder, and sometimes the acid must be diluted with 

 water, in order that the characteristic property may manifest itself). Scratch- 

 ing at most calcareous spar, generally gypsum. 



Sub. Ord. I.— SULPHO CARBONIDEOUS. 

 With the blowpipe colouring brown a glass of silica and soda. 



Gen Sulphato-carbonate of lead ; cupreous sulphato-carbonate of lead ; 



sulphato-tricarbonate of lead. 



Sub. Ord. XL— PURE CARBONIDEOUS. 



With the blowpipe not giving out any colour to a glass of silica and soda, 

 not colouring the flame when melted with salt of phosphorus and deutoxide 

 of copper. 



Gen Carbonate of lead ; Witherite ; Strontianite ; baryto-calcite ; Arra- 



gonite ; Great Genus Spar, (comprising, a, calcareous spar ; J, Gioberite, or 

 carbonate of magnesia ; c, carbonate of iron ; d, carbonate of manganese ; 

 e, carbonate of zinc ; and the compound carbonates, such as dolomite ; brown 

 or pearl spar ; ferriferous carbonate of lime ; manganesiferous carbonate of 

 lime ; sparry and earthy calamine, composed of carbonates of zinc and of 

 lime;) malachite; azurite. 



Sub. Ord. III.— MURIO-CARBONIDEOUS. 



With the blowpipe melted in the salt of phosphorus, mixed with deutoxide 

 of copper, giving a green colour to the flame. 



Gen Murio-carbonate of lead ; lead spar from Mendip ? or peritome bley 



baryt? 



Order XIII.— CHLORIDEOUS. 



Chem, Nat. — Muriates, or chlorides. 



Not effervescing with acids ; with the blowpipe, in the salt of phosphorus 

 " mixed with deutoxide of copper, giving to the flame a bright green colour ; 

 soft ; scratching only talc or gypsum. 



Gen. — Muriate of silver, muriate of copper ; muriate of mercury. 



Order XIV.— MELLATIDEOUS. 



CJienu Nat. — Mellates. 



With the blowpipe on charcoal becomes black, bums, then becomes white, 

 and diminishes in size ; in the matrass gives out water and becomes opake. 

 Soluble in nitric acid. Scratch gypsum. 



Gen. Mellite, or honey-stone. 



Order XV.— OXALIDEOUS. 



Chem. Nat — Oxalates. 



Bums before the blowpipe, leaving for residue a dark porous mass, which 



