The Republican. [volume] (Oakland, Md.) 1877-current, 1889-09-28
SCIENCE AND INDUSTRY.

"A new marble saw cuts two anC y
half inches minute.
In Norway they build all winter
using unslaked lime, and the work il
superior to summer construction.
"A New England inventor, says the
Ironmonger, has perfected machine
that is warranted to make $4,000 nails
a minute, or three tons per day.
1t is fact that sculptors and
painters find the old daguerreotype
better to work from than the photo
graph, for the discarded daguerreotype
registered far better the true modelling
of the face.
Brick thing on fiat roofs can not
be made tight with cement. The tiles
will absorb water; the cement will also
open little by the sudden shrinkage
from the heat of the sun to the tenn
perature of falling rain.
ALL the horse skins used come from
Russia. The leather is clear and
beautiful white and makes the finest
mems gloves. The Russians have a
peculiar breed of horses and very fine
leather is made from their hides.
The first so-called lead pencils
were made in the United States in
1880. 1t is estimated that the con-
sumption in this country is 100000
day; that, at an average cost of five
cents each. amounts to So, 900. 900 paid
for pencils year.
AT the Greenwich observatory
LOGS hours of sunshine were recorded
in 1888. about $50 less than the aver
age of the preceding eleven years, and
1888 below that of 1887. The aggregate
number of hours the sun was above
the horizon was 4,465.
French scientists support the
theory that vegetable forms which now
cover our continents have spread
slowly and continuously from north to
south, recent species forcing back or
celebrating those of more ancient
origin.
According to French astrono-
mer, the cooling of the terrestrial
crust apparently goes on more rapidly
under the sea than with a land sur
face. From this he argues that the
crust must thicllen under oceans at a
much more rapid rate, so as TO give
rise to swelling up and distortion of
the thinner portions of the crust that
is forming mountain chains.
Frho TornA,1onl f,,ot,,
coal, called saccharine. has been con-
demned by Paris doctors, because it
seriously impairs digestion. They
recommend that its use as an article of
diet be forbidden by law, and an or
dinance to that effect is said to have
been enacted. The good old cane SUI
gar seems likely to retain its place for
q while yet, in spite of new inventions
and artifcially high prices.
During inactivity q person will or
dinarily breathe about $50 cubic inches
of air a minute, but while walking at
the rate of six miles an honr he will
breathe 3, 200 cubic inches. Singing is
an exercise which increases the action
VI Gue lungs, pSildpo ofSu lAoIO Ghdh
walking, and vocal music is a gymnas-
tic exercise which increases the expan-
sion of the lungs and the development
of the lung tissue. Those nations which
are given to the culture of vocal music
are strong, vigorous races with expan-
sive chests.
"A French electrician has submit
ted proposal to the municipality of
Paris with a view to supplying the
electric light in a novel manner, which
would tend to conciliate interests,
which at present enter into the ques-
tion-namely, by obviating the neces-
sity for laying down conducting wires.
The originator of the idea has, it APP
! pears, invented a miniature gas motor,
; which he proposes to fix in the lamp
; standard. and above or below, the same
as dynamo would be placed, to actu-
ate an arc lamp on the top of the COL
! umn.