i3flf Extracts from tHe third Volume of 



And, according ta M^ Proust, 



Oxide of copper - , T&^% 



Muriatic acid - , . iqIsl 



Water . _ . . i^tl 



100 



Thtsc two analyses vary so little in their proportions tfeat 

 t!iey serve to confirm each other. 



ibatamit, according to Mr. Proust, contains 

 Oxide of copper - - 704^ 



Muriatic acid - , _ 11 jo 

 Water - - - . 18 V 



100 



Analysis of the Ore of Phosphate of Copper. 



The natural combinations of phosphoric acid liitherta 

 ^nown are those of the phosphate of lime in apatite and 

 Pt3 varieties; and those of some species of phosphate ot 

 lead, of phosjihate of iron, and of blue ferruginous earth. 



To- these must be joined that of copper discovered ia tlvis 

 new mineral, as a new species of copper ore. 



It is found at firneberg, near Rheinbreidbach, ao the 

 tanks' of the Rhine. Its green colour and its radiated tex.- 

 tGtre made it be taken, at lirst, for a kind of nialachite. 



When exposed to the blowpipe on charcoal it fuses into 

 tdark browrj scoria, which at first assumes a round foruv}, 

 but it soon divides and separates. After cooling it has a 

 <ib.ll metallic splendour, and a reddish grav colour. 



A hundred parts of this ore are composed of 



Oxide of copper - - 68* IS 



Phosphoric acid - - 3Q-9a 



i)9-08 

 PITCH STONE, 



jimhjsis of the Pitch Stone of Cijarselaeh, near Meissen^ 

 Under this name were formerly comprehended several 

 ipecies of stones, which at present are placed more conve- 

 niently among the semi-opals. This fossil is found in en- 

 tire masses of the moimtains r it exhibits several varieties 

 of colour. There are some yellow, green, cray, rcddi«h 

 brawn, and bl;.cki-;h. It is compact, and in tlie'inside has 

 the lustre of pitch. Its fracture is conchoid. Its substance 

 is penetrated by a vcvy fine-vemcd tissue which binds it to- 

 gctlier, as n>ay be distinctly seen by immersing the fossil in 

 ■'.vatcr, 



It.^ specific gravity is lG-15. M. Klaproth, in his analy- 

 1 ^s. 



