ANALYSIS OF tJEEDLE-OkEk ^$f 



Colour, where scraped, scarcely deeper than tli:dit of tli(* 

 Friesh and shining orev 



It is disseratnated) and trystalllzed in sixsided elongated ' 



prisms, ac<iuraulatfed in the forni of needles. These crys- 

 tals are sometimes curved, or jointed, always imbedded* 

 and frequently crossing each other. 



I'heir surface is striated longitudinaliyi 

 "They have seldom any percfeptible lustre On account o? 

 the coating. When this is Wanting^ their external lusti-e h 

 but little. Interiorly it is always metallic. 



Their fracture lengthwise is foliated, and very brilliant '" 

 transverse^ uneven and biilliynti 

 Fragments, unknown. 

 Opake. 

 Feels smooth » 

 Soft. 



JBxtremely heavy ; its specific gravity tjeing 6*i25» 

 It is found in the mines of Pi^hminskoi and Klintzefsko^* 

 near Ekaterinenbourg, in Siberia. 



Its component parts, supposing the gold and (Quartz to 

 be accidental mixtures, are 



Bismuth *.»*.».*..» 43'20 Cbmpotiettl 



Lead 24-32 P*"'* 



Copper ..**..i. la-lO 



Nickel ? * ^ . . i . 1 '58 



Tellurium? »...*. i**.^ 1-32 



Sulphur 11-53 



Loss (oxigenized sulphur ?) * » • » 5'90 



100-00 



th a note subjoined to the preceding paper Mr. Pairih patriri iiad 



observes, that wljen he was at those mines in 1786 the needle- considtered it 

 ,,.,,.- . as all ore c3r 



ore na«l just been discovered ;. and as its nature v/as not biNmuihJbng 



known lo the managers of it, they made a secret of the par- ^S"' 



ticnlar spot where it was found. With some difficulty hovv- 



ever he obtained a few fragments of it for their weight in 



gold. From such trials as the smallness of his specimens 



udmilted, he considered it as a sulphuret of bismuth^ 



by which name he dr-sciibed it in his Natural History 



of Minerald) published in Janvjary 1801, and reprinted in 



1803. 



Scientific ■ 



