IS 
Specimens from Torre del Greco . 
as produced by the union of sulphur from the lava with lead, but 
rather as the effect of a depuration of the lead in consequence of 
long exposure to heat. The uncommon softness of the metallic 
lead in these specimens, is a circumstance certainly favourable to 
this theory. 
Nos. 28, 29, 30, are specimens of compact minium, with a 
glimmering lustre, and a semi-crystalline structure. The latter of 
these has evidently been a mass of common shot. 
