. White Vitriol . 91 
diiTolved in Water, throws to the Bottom a 
ferruginous Sediment like the Green. 
It would be endlefs to enumerate all 
the Ufes of Vitriol. Sir Kenelme Digbys 
fyrhpathetic Powder, fo famous in its Day 
for the Cure of Wounds, was nothing elfe 
but Vitriol expofed to the Summer’s Sun 
for federal Days and powdered. But a- 
mongd all the reft, its being an Ingredient 
absolutely neceffary for the making of Ink 
is not the lead to be regarded. Any 
Vitriol that contains Iron will ferve to 
this Purpofe, of what Colour foever it be : 
the Green however is commonly preferred, 
as holding a greater Quantity of that 
Metal: but the White fometimes is not 
lefs docked with it, and then will do full 
as well. Galls unripe, or gathered when 
they are of a blueifh Colour, before they 
come to their full Growth, being beaten 
to Powder, and infufed in Water, give the 
Water a dip tic Tade, without altering its 
Colour much ; but a proportionable Quan¬ 
tity of powdered Vitriol, or a Solution of 
Vitriol, being mixed therewith, turns it in— 
dantly as black as Ink, and wants only 
a little Gum to make it Ink indeed. 
A Decohlion of the dried Leaves of red 
Rofes, of Sage, Oak Leaves, or the Rinds 
of Pomegranates, produces the fame Ap¬ 
pearance therewith. It alfo in like Man¬ 
ner blackens an Infulion of Green Tea^ 
and 
