Arbor Veneris, or, the Copper Three, 207 
Copper cannot perhaps be brought to ve¬ 
getate foftrongly anyWay as by being diffolv- 
ed in acid Spirits ; but having in the Courfe 
of my Experiments difcovered other Means 
of bringing it to produce very elegant Branch¬ 
ings, tho’ fo fmall as to require being viewed 
with Glades, I fhall not conceal them from 
the Reader. , 
Diffolve as much of the blueft and clean- 
eji Vitriol in warm Water as it can poffibly 
fuftain. Put a very little Salt Ammoniac in 
fine Powder upon the Glafs Plate, to which 
add two or three Drops of the Vitriol Solu¬ 
tion. When the Salt Ammoniac is diffolved* 
place in the Mixture upon the Glafs a fmall 
Brad filed bright, wet it all over with the 
Liquor, and fpread the Liquor round it, as, 
in the foregoing Experiments : It will im¬ 
mediately attract the Copper in the Vitriol, 
and foon begin to (hoot out Branches, the 
Form of which, as the Microfcope will fltew, 
very much refembles HeathSublimate 
inftead of Salt Ammoniac caufes a different 
Kind of Shootings.--If the Copper Solu¬ 
tion be overcharged with Salt Ammoniac or 
Sublimate it will not fhoot at all, but turns 
yellowifh round the Nail. A few Trials 
will fettle the Proportion, which is accord¬ 
ing to the Quantity of Copper in the Vitriol* 
An exceeding fmall Drop of Spirit of Wine 
will raife a Fermentation with the Vitriol, 
but 
