Savannah morning news. [volume] (Savannah) 1868-1887, 1886-07-05
POPULAR SCIENCE.

A process has been patented for making
paper pulp from the refuse Of hulled cot
ton seed.
Proctor argues that every celestial body
must at some time pass through a life
supporting period.
BY Japanese process seaweed is made
into paper so transparent that it may
be substituted for window glass.
Edward Bowditch gives the heat units
in | pound of coal as $4,000 and in coke
L., 800, best quality in each instance.
Cayenne pepper blown into cracks
where ants cOnsTegate will drive them
away. The same remedy is also good for
mice.
Asphaltum dissolved in oil of turpen-
tine is recommended as one Of the best
varnishes for smOke-stacks or steam
pipes.
Recent observations Indicate the exist
ence OF submarine volcanic crater be-
tween the Canary Island and the coast of
Portugal.
1t has been demonstrated that caterpil-
lars are affected by magnetic currents =,
which binder their development and even
Kill them.
A mass of lead in an elevated furnace
in Paris was completely dissipated by a
stroke of lightning, no trace OF the metal
beng found atterward.
The great horse-car company of Berlin
pays the municipality 6 per cent. of its
gross earnings. The income which thus
accrued to the city in 1888 was $l3S, I20.
Cod baths are dangerous to the old or
feeble. Warm baths are relaxing, and
should not be taken IN the morning. The
morning is the best time for a cold bath,
the evening for warm one.
The first printing done in America was
in the city of Mexico. There were then
200 printing offices in Europe. The sec
oud press was set up in Lima, Peru, and
the third IN Cambridge, Mass, in 1899.
Anaccident in a Melbourne foundry led
to the discovery that plunging iron cast
ings into mixture of treacle and water
sOftens the metal TO such a degree that il
can be worked as readily as wrought
iron.
Galvanized water tanks are forbidden
to be used on board French men-ot-war.
1t has been shown that water passed
through 300 yards of galvanized iron
pipe took up APO grains of zinc carbonate
per gallon.
The number of inventions on electricity
during 1885 was 1853, or 579 per cent. Of
the whole number of inventions Of all
kinds. The number of the last patent s-
sued in 1888 was 1913, 493. or these about
265.612 are now IN force.
A cement which is proof against boil
ing acids may be made by a composition
Of India rubber, tallow, lime and red
lead. The India rubber must first be
melted by a gentle heat, tfen TO per
cent. by weight Of tallow is added to the
mixture while it is kept well stirred;
next day slaked lime is applied until the
fluid mass assumes a Conscience similar
to that OF soft paste; lastly, 20 per cent. O
red lead is added in order to make it har-
den and dry
Escaping gas may come along the out
side OF pipes communicating with the
main street supply pipes or directly from
the mains themselves, through loose soil.
in quantity sufficient to produce admiX
lures with atmospheric air Of great eX-
plosive energy within buildings. 1t may
be well, then, to see to it that adequate
provision may be made against such con-
tingency by the proper application Of
asphalt or concrete between the mains and
the foundations of houses.
Some Of the best bolt fitting is being
done with taperng holes instead OF
straight holes. The holes are drilled
straight, but are reamed with a reamer
that is slightly tapering. The bolts are
turned by fixed gauge to fit. The taper
IS really more than .Ol Of an inch-or on 3
inches .O3 of an inch-butis just sufficient
to make a perfect Gt when the bolt is nome
and is enough to allow a slight tap Of a
hammer, TO start 1t back. Better fits can
be made IN this way than by straight holes,
and work can be put together and Ia ken
apart much more rapidly.
A paste that will not draw engravings
when pasted down on paper must be thin.
A mixture of gumtragacanth and gum
ARABIC forms, with water a thinner mu-
clage than either OF these TWO gums
alone. Rice -four Is said to make an ex-
celent paste for fine paper work. A go
luton Of , ounces aud half gum arabic
in quarts Of warm water is thickened to
a paste with wheat -four; to this is added
a solution of alum and sugar OF lead, one
ounce and half each, in water. The
mixture IS heated and stirred until about
to boil and then cooled 1t may be thinned
with gum solution.