16 
ii dom .viil. iii dendritical figures on a slab of black clay slate, 
Nat, Hjst. probably a production of art ; vitreous and red 
silver ores. Lead ores: coin m on galena, vari¬ 
ously crystallized ; compact galena : slickenside ; 
brown, white, green, red and yellow lead ores ; 
vitriol of lead. Quicksilver ores ; dark and light, 
red cinnabar, he. 
(Div. 4.) Gold ores : native gold, massive, 
laminar, and filiform, in quartz, with needle-ore 
(bismuth sulfure plumbo-euprifere Hally), he. 
Sylvan ore, or Tellurium, Platina in grains (in 
a phial). • 
Petrifactions, he. : impressions of fishes in lime- 
stone ; glossopetrae, buffonites ; insects : fossil 
crab; various echinites ; shells : several petrified 
species of pecten, chama, anomia ; nautilus : 
belemnitae, commonly called thunderbolts ; cor¬ 
nua Ammonis ; fragments of encrinitas, and 
pentacrinitas, generally called star stones, he, ; 
petrified fruit of a palm, leaves of tropical ferns, 
he. in limestone. 
A collection of specimens of Roelis, arranged 
partly according to their natural affinities. 
{Div. 5.) Granitic and other rocks belonging 
to the slate formation of Mr. Werner. Gra¬ 
nites of the three usual constituent parts, (a 
fragment of the immense mass of granite con- 
... veyed 
