444 
Argentum - 
Hydrargyrum 
Cuprum - - 
Ferrum 
Stannum - - 
Plumbum 
Niccolum 
Zincum - - 
Potaflium 
Sodium - 
Calcium 
Barium - 
Glucium 
Bifmutum - 
Stibium » - 
Tellurium 
MINERALOGY, 
foluble only in nitro-muriatic acid, and 
giving the folution a yellow colour. 
Silvery-white ; hard and tenacious; fono¬ 
rous'; exceedingly malleable and duc¬ 
tile ; melting in a white heat; foluble 
in nitric acid, and imparting no colour 
to the folution. 
Silvery-white ; fluid at the common tem¬ 
perature of the atmofphere : malleable 
when rendered folid by a fufficient de¬ 
gree of cold; evaporating in heat; fo¬ 
luble in mineral acids, and imparting 
no colour to the folution. 
Fine red ; hard and tenacious ; fonorous ; 
malleable and duCtile ; when expol'ed to 
a red heat taking fire and emitting a moll 
brilliant lively green light; exploding 
violently when melted and call intowater. 
Bluilh-grey; very hard, tenacious, and 
elallic; exceedingly malleable ; duCtile, 
attracted by the magnet; melting in a 
white heat; foluble in all acids, and 
giving the folution a black colour when 
vegetable aftringents are added to it. 
Silvery-white ; foftifli; very malleable and 
duCtile; not fonorous; flexible, and 
crackling when bent; melting eafily ; 
'foluble in all acids, and giving the fo¬ 
lution a bitter taf e. 
Bluiflr-white; foft; not fonorous; very 
malleable, and a little duCtile and tena¬ 
cious ; eafily melting, and during lique¬ 
faction exhibiting iridefcent colours on 
the furface; loluble in all acids, and 
giving the folution a fweetilh talle. 
Reddiflr-white ; hard ; malleable ; aflum- 
ing a green colour when heated, and ac¬ 
quiring a purple tinge if the heat be 
continued ; attracted by the magnet ; 
foluble in all acids, and giving the fo¬ 
lution a green colour. 
Brilliant white with a Ihade of blue ; hard- 
ifh ; a little malleable, but not duCtile ; 
flightly fonorous; of a fibrous or fcaly 
texture ; taking fire when heated to a 
firong degree, burning with a brilliant 
white flame and emitting light white 
flakes ; foluble in all acids, and impart¬ 
ing no colour to the folution. 
Newly-difcovered metals. Their bafes 
are the earths whole names they bear. 
Brittle. 
Reddilh-white, foft, brittle, of a lamellar 
texture; eafily melting ; taking fire 
when heated to a ftrong red degree, 
burning with a faint blue flame and 
emitting a yellow fmoke ; depofiting a 
white precipitate if its folution in nitric 
acid be diluted with water. 
Greyilh-white ; very brittle; of a lamellar 
and radiated texture ; melting in a red 
heat, and becoming firft a greyilh-white 
oxyd, afterwards an hyacinthine glafs, 
and at lalt evaporating in a white va¬ 
pour ; depofiting a white precipitate if 
its folution in muriatic acid be diluted 
with water. 
Bluilh-white; very brittle ; of a laminar 
texture; eafily melting, and boiling and 
evaporating if the heat be increafed ; 
burning before the blowpipe with a 
lively blue flame, the edges of which are 
green, and at laft evaporating in a white 
fmoke; depofiting a white precipitate 
if its folution in nitro-muriatic acid be 
largely diluted with water. 
Arfenicum - Bluith-white ; extremely brittle ; fublim- 
ingin a white powderin a moderate heat 
without melting, and emitting a ftrong 
fmell refembling garlic ; its fublimed 
powder giving its folution in water an 
acid tafte, and turning vegetable blues 
red. 
Cobaltum - Bluilh-grey with often afhadeof red, hard- 
ifh, very brittle; melting with difficulty, 
burning in a violent heat wfith red flame ; 
attracted by the magnet; giving a red 
colour to its folution in nitric acid, and 
precipitating a blue powder with the 
addition of potafh. 
Magnefiuin - Iron-grey or brown, opake, hard, very 
brittle, melting with great difficulty; 
attracted by the magnet when reduced 
to powder; mixed with nitre and ex- 
poled a fufficient time to heat, the mix¬ 
ture when thrown into water exhibit¬ 
ing a green, then a purple, then a fcar- 
let, colour, all which at laft difappear. 
Tungftenum Brownifh-red, internally bluifh, brittle, 
extremely hard ; not attracted by the 
magnet; melting with great difficulty, 
when heated is gradually con verted front 
a black to a yellow oxyd, which affumea 
a blue colour with the muriatic acid. 
Molybdxnum Iron-grey, brittle, compofed of fcaly par¬ 
ticles; melting with great difficulty, gra¬ 
dually becoming a white volatile oxyd 
when heated, which with the addition 
of borax is reducible to violet glafs. 
Uranium - Dark-grey inclining internally to brown, 
foft, opake, melting with extreme diffi¬ 
culty; convertible into a yellow powder 
by means of the nitric acid. 
Titanium - Orange-red, very hard, in minute aggluti¬ 
nated grains, not fufible by any known 
heat, forming a blue or purple oxyd 
when heated. 
Chromium - White with a Ihade of yellow, very bris¬ 
tle ; melting with difficulty, diflblving 
flowly in acids ; gradually becoming a 
green oxyd when heated in aclofe veflel. 
Columbium Dark brown-grey, hardifti, very brittle, of 
an imperfectly lamellartexture; yielding 
when pounded a dark chocolate-brown, 
powder, which is not attracted by the 
magnet; yielding a black powdery oxyd 
when expofed to a very violent heat. 
Tantalium - Blackilh-grey, foftilh, of a granular frac¬ 
ture, not foluble in any acid, nor alter¬ 
ing its colour when heated to rednefs 5 
yielding a white powdery oxyd. 
CLASS V. PETRIFACTIONS. 
Thefe are not foffils of themfelves, but animals and 
vegetables, or their parts, changed into a folfile fubftance. 
There are eight Genera, viz. 
Anthropolithus - Man or the parts of man. 
Zoolithus - - Mammalia or their parts. 
Ornitholithus - Birds or their parts. 
Amphibiolitlvus - Amphibia or their parts. 
IClhyolithus - - Fifties or their parts. 
Entomolithus - InfeCls or their parts. 
Helmintholithus Worms or their parts, 
Phytolitlius - - Vegetables or their parts. 
2. ' CLASS 
