ith the greasy matter: those
parts will then appear in relief, exactly as you have drawn them.

_To give a ghastly Appearance to Persons in a Room._

Dissolve salt in an infusion of saffron and spirits of wine. Dip some
tow in this solution, and, having set fire to it, extinguish all other
lights in the room.

_To change Blue to White._

Dissolve copper filings in a phial of volatile alkali; when the phial
is unstopped, the liquor will be blue; when stopped, it will be white.

_Magical Transmutations._

Infuse a few shavings of logwood in common water, and when the liquor
is sufficiently red, pour it into a bottle. Then take three
drinking-glasses, and rinse one of them with strong vinegar; throw
into the second a small quantity of pounded alum, which will not be
observed if the glass has been recently washed, and leave the third
without any preparation. If the red liquor in the bottle be poured
into the first glass, it will appear of a straw colour; if into the
second, it will pass gradually from bluish-grey to black, when stirred
with a key, or any piece of iron, which has been previously dipped in
strong vinegar. In the third glass, the red liquor will assume a
violet tint.

_To make Pomatum with Water and Wax._

Water and wax are two substances that do not naturally unite together;
therefore, to those who witness the following process, without knowing
the cause, it will have the appearance of marvellous. Put into a new
glazed earthen pot, six ounces of river water and two ounces of white
wax, in which, you must previously conceal a strong dose of salt of
tartar. If the whole be then exposed to a considerable degree of heat,
it will assume the consistence of pomatum, and may be used as such.

_Iron transformed into Copper._

Dissolve blue vitriol in water, till the water is well impregnated
with it; and immerse into the solution small plates of iron, or coarse
iron filings. These will be attacked and dissolved by the acid of the
vitriol, while the copper naturally contained in the vitriol will be
sunk and deposited in the place of the iron dissolved. If the piece of
iron be too large for dissolving, it will be so completely covered
with particles of copper, as to resemble that metal itself.

_Iron transformed into Silver._

Dissolve mercury in marine acid, and dip a piece of iron into it, or
rub the solution over the iron, and it will assume a silver
appearance.

It is scarcely necessary