Daily Republican., 1884-12-18
8CIEN rIFIC.

Paper labels for acid bottles should
be fastened on with strong glue, and
Afterwards soaked with melted paraffi ne,
which can be easily applied with he
aid Of Q hot glass rod. Bottles contain.
ing sulphuric acid need not be labelled
ut all, as the high specific gravity of the
liquid IL sufficiently distinctive to one
accustomed to Its use.
1t is we'll known to electricians that
the best steel makes the best permanent
magnet. But the magnetism of steel
depends upOu how hot or how cold the
metal ia. For example, steel loses its
magnetism ifsubjected to q temperature
Of 1000 below zero; 1t also loses Its
magnetism when heated TO yellow heat
that Is, between red and white heat.
An excellent tinctuie to remove spots
from woOllen cloth Is made of alcohol
ninety Per cent, sulphate Of naphthaline,
French oil of turpentine, spirits of sal.
ammoniac, and soapwort. The latter
must be boiled, sieved, mixed with the
other four ingredients and bottled. 10
remove spots OF tar, resin or wax SOAP
work can be dispensed with, the other
chemicals being sufficiently effective.
We extract from foreign journal
the following formula for . cement,
which is very nearly colorless Seventy
parts dne-cut, pure India rubber,
solved in 10p0arts of chloro form whom
the rubber Is thoroughly dissolved, add
fifteen parts gum mastic. 1t will re.
must he kept In stoppered bottle, out
of the reach Of heat.
1t Is said that the sand used in the
a., 81 mi tox hxy
Paris company to make white bricks
and blocks, said not to be injured by
frosts, rain, ETC., and to be very light,
the specific gravity being only l.50 TO
1 Us 0fciay bricks. The sand is first
8 rongly pressed by hydraulic power,
aud then baked in ovens at very high
TEN perature. Tue bricks are almost
pure silica
There is a movement on foot to de-
velop the oil fields of Canada. Oil
taken from place 100 miles north OF
Edmonton gave, according to an analy-
sis by Professor Chapman, Of Toronto,
the following result Infiammable
volatile matter, 9i.53 per cent, and fix
ed carbon and ash, 8. 43 per cent. The
volatile matter CONT lists Of hydro car
bons. The gum presents the usual
II
petroleum"
Dull gold can be cleaned with the
following solution Eighty gramme.
each of calcium hypochlorite and sodi
um bicar Donate, and twenty gramme,
Iof common salt In three quarts Of dis
TITLED water. Preserve in corked bottles
Articles to be cleaned should be pu
Into o basin and covered with the mix
Iture Al ter n tiuus thew should be takeI
Tout, washed, rinsed in alcohol and driet
in sawdust. The IA. ticles viii then lool
as good as new.
A tunnel, measuring about 5000 feel
long, and constructed at least MINI
cen Iuries before the Christian era, ba
, lust been discovered by the governor o
1.-The Island of Samof. Herodutus men
tions this tunnel, which served fo
providing the old seaport with drink
ling water 1t ia completely preserv ed
and contains water tubes OF about Tel
Inches in diameter, each one provided
with q literal aperture for cleansing
purposes. The tunnel is not quit
straight.
Channels may be cleaned in veal
solution Of soda In warm water. Ru
plenty of soft soap into the leather. ant
allow it to soak for two hours. Tbel
rub it we'll until it in quite clean, ant
rinse 1t we'll in a weak solution com
posed of soda, yellow soap and warn
water. II rinsed in water only 1t be
comes hard when dry, and unfit 70
use. After rinsing, wiring iG we'll In
coarse towel and dry quickly I; the
pull it about and brush it we'll, and
will become softer and better than MOI
, IneW leather,