Orange County observer. [volume] (Hillsborough, N.C.) 1880-1918, 1891-02-21
SCIENTIFIC AID INDUSTRIAL.

An S'atmosphere' is a pressure II AZ
pounds to the square inch.
Doctor koch's lymph is described as
Of q rich amber color, covered VIII
foam.
A Pennsylvania manufacturer claims
that be can manufacture aluminium fof
fifty cents per pound.
The CITY or Denver, Col, IS discussing
tie possibility Of establishing a plant FOR
furnishing Is own electric lights.
Or the 1900 species OF flowers Tow
cultivated III Europe, it IS SAID that only
ten per cent. give forta any odor.
The experiment Of cnloroforninc a
person during sleep has been made sue
cessfully. 1t cannot b any means u
said TO be uniformly successful.
A good way to keep modelling clay
moist is 20 kncad dry clay with giycerine.
The mass thus obtained continues nois-
and plastic for 3 'ength OF t'ne.
The Hungarian Government favors a
scheme for an clecSfic railway between
Vienna and Bnda Pcsth, a distance OF
80 miles, to run single cars every tea
minutes.
Celluloid in solution IS now being ey-
ltcnsivcly used a. a lacquer Tor all kinds
Of fine metal work and IS a wool var
nish, with result that are said to be su-
perior to the old methods.
It IS said that the torpedo boat BATH
urst, that recently made q mean speed Of
24.4o knots per hour, represents the last
refinement of mechanical engineering,
and that it hardly seems possible to lrn-
prove upon her as long As steel remains
the CHIEF material of construction.
The apparently almost inevitable fail
urc Of some one Of the thirty, or there
abouts, machines employed in working
a full equipped great gun has caused u
reaction in England in favor Of smaller
guns and of doing away with as mucA
machinery as possible. The Thundcrer's
100-tonncrs have been taken OUT and re-
placed with 29-tonncrs, worked entirely
by hand.
Many authoritative disclaimers have
been recently made against the inIis-
crlmlnatc use Of such ~prescrvatives as
borax, boric acid and s%alicylic acid, more
especially % applied to milk, cream, and
other articles Of food and drink. Their
actual in juriousness is not asserted, but
in many cases it is believed that their
function can be performed better and
more safely by refrigeration.
The steam engines of the world repre-
sent, approximately, the working power
Of 1000, 000, 900 of men, or more than
double the working population Of the
world, the total population Of which is
usually estimated at 1,45o, 923, 900 in
habitants. Steam has accordingly cna-
bled man to treble his working power,
making it possible for him to cconomize
his physical strength while attending to
his intellectual development.
A prize has been given in France by
the Society for the Encouragement OF
National Industry, for a process for re-
covering tin contained III the wash OF
water from silks which have been treated
with bichloride of tin, for the purpose
of giving weight. BY adding milk OF
lime to the water, and by properly agi-
tating, the tin settles down in a few
hours in the state of oxide, which car
be readily collected aud disposed Of.
A quick and easy method for deter
mining whether or not a fabric is cal
WOOL IS given in the London Lancet
This is to separate the warp from Tx
wool and TO hold each to a flame. Woo
burns INTO "a shapcless mass and NJ
threads can be traced in its asa. If re
moved from the fire before it is al
burned it ceases to blaze; cotton. on tn,
contrary, continues to burn steadily, an,
its ash retains the shape OF the thread.