NATIVE NICKEL. 129 



NATIVE LEAP. 



Ge<liegen-Blei. LEONH. S. 223. Plomb natif. BOURNON. 

 Cat. p. 333. 



Massive. Fracture hackly. 



Lustre metallic. Colour pure lead-grey. Streak 



shining. 

 Malleable. Hardness = 1-5. Sp. Gr. =11-3523, 



HAUY. Disagreeable odour by friction. 



It melts easily before the blowpipe, and covers the char- 

 coal with a yellow oxide. Octahedral crystals may be ob- 

 tained by fusion. Metallic lead, as it occurs in nature, is 

 almost in every instance accompanied by such substances 

 as betray its having once been in a state of fusion. It was 

 first noticed by RATHKE from the island of Madeira, where 

 it is imbedded in vesicular masses, considered as slags by 

 some, and as volcanic rocks by others. Many other localities 

 are of a similar kind. It has been found in a rolled mass of a 

 stone weight in Anglaise river, North America, traversing 

 hexahedral Lead-glance in narrow veins. It has been 

 quoted also from some abandoned mines in the vicinity of 

 Carthagena in Spain, as occurring in capillary and other 

 imitative shapes, engaged in a blackish clay. Lately me- 

 tallic lead has also been found near Alston in Cumberland. 

 It is associated with hexahedral Lead-glance, rhombohe- 

 dral Quartz, &c., but also with litharge, and a fused mass 

 resembling a slag. It fills a vein near the surface of the 

 earth, in compact limestone. 



NATIVE NICKEL. 



Native Nickel. JAM. Syst. VoL III. p. 559. Man. p. 326- 

 Native Nickel. PHILL. p. 282. 



Delicate, capillary crystals. 



VOL. III. I 



