Arbor Veneris , or , the Copper Tree. 199 
fo fine a Contraft to the Colour of the Cop¬ 
per, that when the Branches are forme it 
looks like the fineft Mocha Stoiie : and a 
Jeweller to whom I fiiewed one of thefe 
Produftions told me, a Stone like that would 
be worth an hundred Guineas. 
This Experiment feems of great Impor¬ 
tance ; ferving to explain how Ramifications 
of a like Appearance are produced, either on 
the Surface or in the Filures of Slate, Flints , 
Agates , Mocha Stones, Florentine Marbles, &c. 
and perhaps even in their very Subfiance at 
the Time of their Formation, by the Inter-* 
mixture of faline and metalline Particles $ and 
alfo how Metals, difiqlved by and incorpo¬ 
rated with the faline Juices of the Earth are 
formed into Branches and feem to vegetate 
It was discovered, accidentally, by the very 
ingenious Mrs. Colembine , of the City of Nor- 
* Of this Kind I fuppofe the Ramifications of Silver, Cop¬ 
per, and Iron to be that are met with oftentimes in Mines; 
either incorporated with the Stony Bed of the Metal, as'in 
the capillary, vegetative, or arborefcent Silver Ore from 
Potofi, or in Shootings or Branchings out from the Ores 
themfelves: in the Manner of an Iron Ore defended by 
Doctor Woodward, (Vol. I. Clafs IX. Part IV. N° 85.) 
having very fine Shoots or Ejfiorefcencies ; from a perpendicu¬ 
lar Fifiure in a vaftly high Mountain in Cumberland; where 
he fays, great Numbers of much finer Shoots than that in 
his PofTefiion, (but fo brittle and tender he* could not pre- 
ferve them) rofe like Vegetables, with a fingle Stem, which 
parted afterwards into feveral Branches, of all Sizes, to the 
Jdeight of near two Inches. The Stems were round, and 
fo were the Branches; but towards the Extremities they 
were fo jagged as to refemble common Heath . They were 
exaftly of the Complexion of Iron, a <fulky red with a 
ipaft of blue? * « :> ~ 
0 4 w ich 9 
