Orange County observer. [volume] (Hillsborough, N.C.) 1880-1918, 1890-09-13
SCIENTIFIC AND INDUSTRIAL.

There are thlrty-two compositions On
the market to prevent submarine growth
on iron ships, and nore of them does the
work.
The extraordinary feat of t~elephoning
between St. Petersburg, Russia, and
Boulogne, France, a distance of 2465
miles, has recently been accomplished.
Carriage wheels are now being made
from cold rolled steel. The spokes are
tubular and adjustable. The wheels are
so put together that any par. can BE-
replaced without taking off the tire or
f~elfoe.z
A. Hunt sunk an ~artesian we'll $50 fee.
two miles from San Bernardino, Cal. re
Gently. The water rises thirty snches
above the top of the casing, and stones
Of eighteen pounds weigh. are occasion
ally thrown out.
Eg means Of tvs instruments, which
re calls the acknowledgement and the
"neomatchomete," Professor Dooders
# Utrecht, has discovered that it takes
the brain one .067 of a second to elabor-
ate a single idea.
Asearch light now costs about SO, 900
and weighs 1000 pounds, new search
light weighing $50 pounds, of 1000 can
die power, and said to be able to pene-
trate the thickest fog for the distance Of
one-oighth Of a mile, costs less than
$500.
A system of steno-teleeraphv has been
shown to the French Chamber of Dcpu-
tie, invented by NJ. Cassagnes, by which
shorthand reports of speeches can be
sent any distance as they come from the
stenographer. The speed Of this instru-
ment IS also said to be unparalleled,
An Austrian engineer has tried the eff
feet Of adding crystallized soda to Port
land cement mortar and exposing the
same to the action Of frost. The specl-
mems were afterward placed IN a hot
oven where they remained for three
hours. At the expiration of this time it
was found the extreme cold had had no
Instantaneous effect on the setting Of
the specimens.
A new French clock contains a novel
application of the magnet. The clock is
shaped like a tambourine, with a circle
y W pdlnlCo Ou lIS uCdu. ATOu01
the circle two bees crawl, the larger one
requiring twelve hours to complete the
circuit, while the smaller one makes it
every hour. Different flowers represent
the hours, and the bees, which are of
iron, are moved by the magnets behind
the head Of the tambourine.
A firm in Munich has made a carriage
which is propelled by gas generated from
benzine of analogous material. The mo
tor, which is not visible from the out
side, is placed in the rear of a three
wheeled carriage over the main axle,
and the benzine used is carried in a
closed copper receptacle secured under
the seat, from which it passes drop by
drop to the generator. The speed is
regulated by a lever. Ten miles an hour
| can be made.
patented in England. In apparatus en-
pioyed for the collection Of sound trans
mitted through water, particularly be-
tween ships, some difficulty is expert
enced in properly recording the sounds
on account Of the instrument being al
fected by other causes, such as the move
ment Of the ship. This defect has now
been remedled by constructing the appa-
ratus SO that any pressure caused by the
increased density of the water has no eff
feet upon it.
In answer to an inquiry regarding safe
ty water gas as an illuminant the Board
of Health Of the City of Mexico publish
a long report covering the result of their
Investigations during a period Of a year
and a half. They declare water gas to
be both poisonous and explosive. and
while reserving their opinion ~reqardinca
possibly safer use OF tins gas if gas appli
ances are improved SO that there can b.
no leakage, they only recommends use in
public streets. uncovered places. and
apartments we'll ventilated.
En- a recent lecture on ..Flameless Com
bustlon" T. Fletcher said The apnear-
ance Of flame IS misleading. and the
greater the flame the smaller the work
done, other things beng equal. have
been asked by a well known engineer if
| could explain why certain boilers gave
such Al exceedingly smalt duty fol the
tlel consumed when the tlucs were, as he
saId. filled from end to end with u1ar-
nlfcent flame, The fact was that hi.
so-called magnificent flame was a delusion.
hollow AUD cold inside, and no. comin1
II contact With his boiler At all. When
the salue ffl=l vas burned With i ver{
small flame hardly visible over ths
bridge. the duty decreased some thirty
Der cent