%oi Arbor Veneris , or, the Copper Tree. 
portion of Nitre be in the Compofition of 
the Aqua Fortis. 
A like Solution, with the Addition of Salt 
Ammoniac % will (hoot fooner and ftronger. 
If forne Nitre and Alum powdered, and in 
equal Quantities, be put to the fame Solution 
of Copper, jnftead of Salt Ammoniac, Branch-- 
es will be produced, of quite another Fa*- 
(hion and Character* 
Difiblve 7 or 8 Grains of Tin Shavings in 
half an Ounce of Spirit of Nitre : this will 
be effected without great Ebullition, and the 
Metal be jntjrely fufpended. Put into the 
Solution a clean Halfpenny, which take out 
after 12 Hours ; then add a few Grains of 
Salt Ammoniac, putting it in by little and 
littles and trying the Mixture from Time to 
Time. This (hoots very well. 
Aqua Fortis fent me from Norwich p 
(made there by Mr. Finch) (hoots very well 
either with or without Tin . It dilfolves Tin 
without any Precipitation, and afterwards 
acquires a Confidence with Copper, like that 
of Mrs. C olembine .—Five Grains of Tin were 
put into 7 Pennyweight of this Aqua For¬ 
th; Inlefs than an Hour an Halfpenny was 
put into the Solution $ and two Hours after, 
a Nail being dipped in the Mixture, (y(hich 
was then as thick as Starch) and placed^ upon 
the Glafs with fome more of the Mixture 
round it, began to vegetate in five Minutes. 
* Salt Ammoniac with Aqua .Fortis 
makes an A^ua Me- 
An 
