'Arbor Veneris , or , the Copper Tree. 203 
An Halfpenny was put into four Penny^ 
weight of the fame Aqua Forth: four 
Hours after a Nail was dipped therein, and 
placed upon the Glafs, and in 15 Minutes 
the Copper fhot itfelf all round. Salt Am¬ 
moniac added to it quickens the Experiment 
and makes the Shootings ftronger. 
A Solution of Copper in Aqua Regia fhoots 
out pretty Branchings of Copper, and better 
ftill if fome Salt Ammoniac be put to it after 
the Copper is taken out. 
Tin will diffolve and be fufpended in Aqua 
Regia: it blackens the Liquor during the 
Ebullition, but leaves it at laft clear without 
any Precipitation.—Diffolve 7 or 8 Grains of 
Tin in half an Ounce of Aqua Regia, then 
put in an Halfpenny, which let remain 24. 
Hours. This Mixture will have the Con- 
f hence of Starch, and will vegetate round 
the Nail; it is of a dark green Colour. ’Twill 
be improved by a little Salt Ammoniac . 
I could give many other Experiments of 
this Nature, but the Curious and Ingenious 
will be able from thefe Hints to make Dif- 
coveries themfelves of a great Variety of 
Branchings, by difFolvirig Copper in diffe¬ 
rent Menftrua, and by adding Mercury, Tin, 
Nitre, Alum, blue Vitriol (which contains 
Copper,) Corrofive Sublimate, Saccharum 
Saturni, Borax, &c. This may eafily be done, 
by adding which they pleafe to a Drop or two 
pf the Copper Solution upon a Plate of Glafs, 
and trying it with a Nail; and if they 
like 
