Smyrna times., 1884-07-23
Science.

Oil of wintergreen mixed with an
.qual quantity of olive oil is recon- {
nended as a rheumatic painkiller.
The sawdust and the refuse of saw
lust is now made to yield fourteen
gallons of turpentine, three to four
gallons of resin, and quantity of tar
per cord.
DIR. Roller says that if silk tissues
are impregnated with chromate of cop
per and then exposed to the direct sun
shine, various shades of brown may be
and the fabric is rendered
waterproof.
Wire cables from the Fairmount sus-
pension bridge were found-pieces of
them being tested-to possess as much
electricity, ductility and tenacity as
they did forty years ago, when they
were first used.
Mr.. Bradlee, an architect has proved
beyond all dispute that Portland
cement does expand. He filled three
glass bottles with cement, and closely
sealed them. One of the bottles burst
in two days, another in eight days, and
the third in ten days.
The aluminium process for the deco
ration and preservation Of iron and
steel is intended to take the place of
nickeling, Timing and coppering. The
coating leaves the sharpness of the
outline unimpaired, and adheres close
ly to cast and wrought work.
A proprietor of a chain works says
that in 1866, when he first commenced
making chains, he got over 81 a pair
for trace chains, seven years later 65
cents, and now 35 cents. For coil
chains, in 1872, he got % cents a pound,
against little over 81 cents now.
Leather car wheels are made in
France. The inventor is NJ. de la
Roche. Untanned buffalo hides are
cut into strips, and these are built up
into solid disks, which are strongly
held together by two iron rings after
they have been subjected to hydraulic
1 pressure.
A French savant, NJ. Chevreul, be-
lieves the action of rolls for grinding
wheat is better calculated to preserve
intact the cells of the interior of the
wheat berry than is the action of
stones, which disOrganize the cells by
their tearing action instead of disinte-
grating them.
An oil for betting is recommended
which consists of nine parts of linseed
oil and four parts Of litharge, ground
in water. These, boiled to a plastic
consistency, then liquefied by an addi-
tion of turpentine, furnish an oil which
it is claimed, possesses many admirable
qualities.
An electric bouquet was presented tC
the Crown Princess of Austria, a short
time ago, at Vienna, which consisted ot
a group of snowy globes, inside o
each was an incandescent lamp, fec
from small storage batteries in the vase
The capacity of the battery was founC
sufficient to maintain brilliant illu
mination for three days.
/ The decline in the price of coppe
makes it probable that it will be uset
as roofing, among other new purposes
1t does not require to be painted lik
the tin roof every two or three years
as it is not subject to rust. Even a
| present prices, though copper roo
might cost two or three times as mucl
as tin roof, in the end it would b
much less expensive.
/, Rubber rings, such as are used Ol
fruit cans, often become hard an,
brittle. They can be restored by let
ting them lie in water in which yol
have put little ammonia. Mix il
, this proportion; one part ammonia an,
two parts water. Sometimes they d
not need to lie in this more than fiv
minutes; but frequently a half-hOur
needed to restore their elasticity.