16 
Nat, Hist, 
room vrif. in dendritical figures on a slab of black clay slate 
(probably a production of art); vitreous and red 
silver ores. Lead ores : common 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, &c. 
• (Div. 4.) Gold ores: native gold, massive* 
laminar, and filiform, in quartz, &c. Sylvan ore* 
or Tellurium. Plafina in grains (iri a phial) t a- 
sipoon of the same metal for experiments with' 
t‘he blow-pipe. 
‘-Petrifactions, he.: a turquois, set with dia¬ 
monds in a ring; impressions of fishes in lime¬ 
stone ; glossopetrse, hufonites ; : insects : fossil 
crab ; various echini tes shells : several petrified 
spscies ; of peeten, Obama, anomia;. nautilus: 
helemnitae, commonly called thunderbolts ; cor¬ 
nua Ammonis; fragments Of encrmitae, and 
pentacriiikm, generally called star stones, &c. ; > 
petrified fruit of a palm, leaved of tropical ferns, 
he. in IhilestonC. 
A toMectwn of specimens of Rocks, arranged 
per Up according to their natural affinities. 
(Did. b.) Granitic and other rocks belonging 
to the slate formation of Mr. Werner. Gra¬ 
nites of the three usual constituent parts, (a 
foment of the immense mass of granite eon-' 
o o 
; - ** veyed 
