icle to be
cleaned should then be laid upon a linen cloth on a table; and having
provided a clean sponge, dip it into the potatoe liquor, and apply it to
the article to be cleaned, till the dirt is made to disappear; then wash
it in clean water several times. Two middle-sized potatoes will be
sufficient for a pint of water. The coarse pulp, which does not pass
through the sieve, is of great use in cleaning worsted curtains,
tapestry, carpets, and other coarse articles. The mucilaginous liquor
will clean all sorts of silk, cotton or woollen goods, without hurting
or spoiling the colour. It may also be used in cleaning oil paintings,
or furniture that is soiled. Dirtied painted wainscots may be cleaned by
wetting a sponge in the liquor, then dipping it in a little fine clean
sand, and afterwards rubbing the wainscot with it.

SILVERING. For silvering glass globes, and such kind of articles, one
part of mercury, and four of tin, are generally used. But if two parts
of mercury, one of tin, one of lead, and one of bismuth, are melted
together, the compound which they form will answer the purpose better.
Either of them must be made in an iron ladle, over a clear fire, and be
frequently stirred. The glass to be silvered must be very clean and dry.
The alloy is poured in at the top, and shaken till the whole internal
surface is covered.

SILVERING OF IVORY. Prepare a diluted solution of nitrate of silver, and
immerse in it an ivory paper knife. When the ivory has become yellow, in
that part where it is in contact with the fluid, take it out and immerse
it in an ale glass containing distilled water, placed in a window. In a
short time, by exposure to the rays of the sun, it will become intensely
black. Take it out of the water, wipe it dry, and rub it with a piece of
leather. The silver will now appear on the ivory in a metallic state,
and the knife will retain its silvery coat for a long time.

SILVERING ON SILK. Paint flowers or figures of any kind on a white silk
ribbon, with a camel hair pencil, dipped in a solution of nitrate of
silver. Immerse this whilst wet in a jar of sulphurous acid gas, by
burning sulphur under a jar of atmospheric air. The penciling will then
assume a beautiful metallic brilliance.

SINAPISMS. The sinapism is a poultice made of vinegar instead of milk,
and rendered warm and stimulating by the addition of mustard,
horseradish, or garlic. The common sinapism is made of equal quantities
of b