201 
OF CORNWALL. 
Fig. xiv. The fmooth, folid, high-bliftered copper, (fe&ion hi. 
page 198) from Huel-fortune in Ludgvan, the moft pure and beau- 
tiful of the green kind. 
xv. The fame fort, mamillary with a drop at the bottom, formed 
probably in a pendulous pofition. 
xvi. Virgin leaf-copper, branchy. 
xvii. Ditto. 
xv 111. Ditto. 
xix. Virgin- ore branched, and fibrous like the anatomy of a leaf. 
xx. Virgin-ore, fringed at the edges. 
xxi. This elegant fpecimen of virgin-ore run into hollow filagree, 
confifting entirely of fo many branchy filaments, terminating in 
little aftroite tufts, and the ends of the branches tipt with pa- 
pilla , all of pure copper, came from the Tolvaen copper- work in 
the parifh of St. juft, Penwith, 17 54 b . 
xxii. Brighteft virgin-ore fhot into daggers, cufpides , branches, 
and fprigs, as <2, /£, c, dj e. 
xxm . The pureft virgin-ore from Mullion formed into drops. 
XXIV. D°. fpread into regular leaves, and bunchy. 
The two laid fpecimens are of the richeft, moft fparkling, and 
beft naturally polifhed copper-ore which any mine affords ; fome 
years fince it was raifed in the parifh of Mullion in large lumps of 
feveral pounds weight, one lump of it weighing forty pounds: 
what heightens the beauty of this ore is this, that in moft places it 
is enamelled with that green flaky azrugo , which age alone gives to 
coins and medals, and art in vain endeavours to imitate. 
Copper covets not geometrical or angular figures. 
It may feem a little furprizing that we fhould find copper native sect.x. 
and malleable fo much more frequently than any other metal, and aUe copper," 
in fuch a variety of colours and fhapes. The reafon is this : Cop- andof ^ 
per in the mine is more eafily diffolved and ftripped of its ftony from the 
involucrum than any other metal : it is foluble by all the lalts known, nune - 
both acid, alkaline, and nitrous c , nay even by common water, and 
in fome ftates by the air itfelf. What makes it yield fo to almoft every 
fluid, is, that there is little ftone, but much vitriol incorporated with 
copper; and vitriol, being no other than a free foluble fait, is always ready 
to mix with every kind of moifture which attempts it. Hence it 
comes to pafs, that copper is frequently liquified in the earth, and 
every time the vitriol melts, and becomes fufpended, the incorpo- 
rated copper deferts its priiiiceval bed of ftone, and when it becomes 
too heavy to be born along by the fluid vehicle, diftills from 
b This feems to be what the Spaniards in their page 85. 
Peruvian mines call Machacado. Alonfo Barba, c Boerh. page 88, 
Ff f 
higher 
