Year: 1863

tion Of gold in nitro-muriatic acid taqUa
regal and pour into It a quantity Of sui
pburic ether; the ether will take up the
gold and float upon the denser acid. The
article IS then to be washed with this au-
riferous ether with hair penciD; the
ether fiies off and the gold adhereS.


To SILVER BRAss.-Take part chloride
of silver (the white preeipitate which fails
when a solution of common salt is poured
into solution of nitrate Of silver or lunar
caustic), 3 parts Of Pcarlash, l Of whiting
and IL Of common salt, or part chloride
of silver and 10 parts cream of tartar, and
| rub the hrSss With =, uNoisteRsd piece Of
fcOnk dipped IA kAI' rsE6.1! (.


PIERCING A HOLE IN GLAss.-The most
simple method Of making q hole in glass
is, II possible, to pick out place where
there is a bubble in the glass. A very
hard steel point is then taken, and worked
round in the place, where it generally
soon makes hole down to the bubble,
and by a repetition Of the process the
hole is completed, which is then enlarged
at pleasure by a rat.tail tiie. Care must
be taken that tie file is smaller than the
hole, for if it should stick in the hole the
endeavor 70 disengagef it would certainly
crack the glass.


TO STAIN PINE BLAcE.-The pine must
be perfectly free from knots (as they will
not color), and strong solution Of hot
logwood rubbed carefully all over the
board and then it is alluS ed to dry. An
other coat may be given, or number,
according TO the shade wanted. Aftcr
the logwood is dried, solution of cop
peras should be applied in the same way
as the logwood.


Poison BALLS FOR RATS AND ROAcuEs.
Put q drachm of phosphorus in bottle
along with 2 ounces of water cork it and
plunge it into q vessel OF boiling water
till the phosphorus is dissolved, then pour
it into . mortar along with three ounces
of lard, and rub it briskly, adding some
water, about half pound Of flour and 2
ounces Of sugar. The whole is made into
n paste and divided into balls about the
size of marbles. This is laid down on the
floor or shelves for rats, cockroaches or
other vernin, who eat. and are destroyed.
For rats cheese is better than sugar, and
tallow better than lard. The cockroaches
are fond Of anything sweet, hence sugar
is a bait for them. Potatoes will answer
as we'll as the -four. These balls should
be laid down at night and carefully lifted
in the morning, taking care not to let any
be touched by a child. They should be
locked up through the day.


To REMOVE Foul AIR FROM WELLs.-It
is well known that nanny accidents occur
to persons going down into wells to clean
them, owing to the noxiouS gas in such
places. To remove the gas before descent
is made into any well, a quantity of burn
ed but unslacked lime should be thrown
down. This, when it comes in contact
with whatever water is below, sets free
great amount of heat in the water and
lime, which rushes upwards, carrying all
the deleteriouS gases with *; after this,
descent may be made with perfect safety.
The lime also absorbs carbonic acid in the
well.


PERMANENT TNK.-Shell.lac, 3 ounces
bOrax. / ounce; distilled or rain water,
Is ounces; boil the whole in a closely
covered tin vessel, stirring it occasionally
with glass rod or small stick, until the
mixture has become homogeneous; filter,
when cold, through a single sheet of blot
ting paper; mix the filtered solution,
which will be about 10 fluid ounces, with
one ounce of muciage of gum arabic, and
add pulvcrized indigo and lampblack ad
libitcm. Boil the whole again in cover
ed vessel, and stir the fluid we'll to effect
the complete solution and admixturc of
the gum arabic; stirring it occasionally
while it is cooling,and after it has remain
ed undisturbed for two or three hours,
that the excess of the indigo and lamp
black may subside, bottle it for use. The
above ink, for documentary purposes, is
invaluable, being, under all ordinary cir
cumstances, indestructible it is also par
ticulArly well adapted for the use Of the
laboratory. Five drops of kreosote added
to pint of ordinary ink will effsctuauy
prevent its becoming mOldy.-[Scienti6c
American.