f ART III. Of SKdetdls. 
fubterraneal fire may be queftion d. Of the reft, 'tis plain to 
the contrary. 
Pure MASSY COPPER from the Mine. Given by the 
fame Hand. It grows to a white and femiperfpicuous Spar, 
which cuts Glafs eafily, and deep. 
YELLOW COPPER-ORE, from the Mine at Hern- 
grunt. Given by Dr. E. Brown. Tis of a rediih yellow, 
mixed with fome fparks of the colour of Gold, both with- 00 p. 108; 
out and within. It yields ordinarily, ^ th part Copper : fbme- 
times ? ths or above half. See his Travails. ( a) 
Another piece of YELLOW COPPER ORE. Given 
by Mr. Oldenburg.'Tis immerfed in fmall fparks in a brown 
Stone 3 to which adhere fome very green Flakes of the na- 
ture of the Turcois. 
BLACK COPPER ORE, holding SILVER. There are 
fome Grains of a dark Purple mixed with it. Given by 
Dr. Brown. 
Another Piece, with fome efHorefcence of white Vitriol 
upon it 5 perceived efpecially by the Tail. 
A Third piece, with natural Verde griece. 
BLACK COPPER ORE, immerfed in a Blackifti Stone, 
which is flaked fomewhat like Lead-Ore 3 probably acourfer 
fort of Cinnabar. Given by Sir Rob. Moray. 
Of Copper, with the addition of Calamy, is made Brafs 
with increafe, in the proportion of * d or more, according 
to the Stone, and manner of operation. Of the making of 
Brafs, fee Agricola. 
Of Copper are prepared, the Calx, Crocus, Quintefcens, 
Tintlure, Oil, Vitriol and Flowers. Some of them much, 
and well ufed outwardly againft ill natur'd Vlcers. And 
alfo juftly to be reckon'd among the beft Remedies for 
the Eyes. That the Labourers in the Copper-Mines, have 
them always good, is an obfervation of Macrobiw* 
CHAR 
