Orange County observer. [volume] (Hillsborough, N.C.) 1880-1918, 1892-09-10
SCIENTIFIC AND INDUSTRIAL.

Cooking by electricity is increasing.
TIE d-cne bees eyes each contains
1890 mirrors.
The common caterpillar has 1000 mus
c,cs in MS body.
A-te~ian borings have recently proved
:, be verv successful in the Saharsa
Desert.
steam launch has just been built
which makes q mile in two minutes and
one second.
\ London firm finds a windmill the
most economical means Of securing the
motive power necessary to run q dy-
aAmo.
Il mas been computed by competent
authorities that in a single cubic foot of
ether there are locked up 10, 900 feet Of
energy.
1t j. calculate tina. IN London nearly
40. 900 tons Of sulphur are produced
annually by coal consumption and thrown
iato the air.
Recent experiments in France on the
velocity Of propagation OF electric waves
give axinesn velocity which is almost ex-
act!y that Of light.
The best way to clean wells and els
terms of foul air is to throw down a peck
Of uasIacked lime. Tue heat so causo1
carries out the fou. air with q rush.
Experiments made by II Hungarian
physician on animais seem to show that
permanganate of potash acts as an eff
Gent antidote in acute phosphorus poi
sonlnE. {
According to DR.. Ha asen, the red in
flowers isa single pigment soluble IN
water ard decolorized by alcohol, but
capable Of bsing restored by the addition
OF acids.
The dynamo is replacing the battery
to such an extent in telegraphy That its
use VIA, il is thought, be universal in a
few years. 1t is both cheaper aud more
efficient.
Investigations Of rain drops lead to
the conclusion that some of the large
drops must be more or less hollow, as
they fail when striking to wet the whole
surface enclosed within the drop.
Many Of the small lakes Of the alkali
and saline regions Of California, Nevada
and other parts Of the world are sat
urated and deposit tueir salts when any
of the water is removed by evaporation
or when salts are added from the inflow.
A watch for the blind is among the
newes inventions. A small peg Is set
ia the middle of each figure. Wnen the
hour haud reaches a given hour the peg
for that hour drops. The sightless W
er, when he wants to know the time,
finds which pc, is down aud then counts
back to twelve.
A new alloy for use in the manufac-
ture of wire sheets and castings has been
introduced by New England firm. The
wire made Of this material resembles Or
binary copper wire on the outside, has q
pinkish white tin1e at the surface of
fractvre, and is very strong without
losing much ductillty.
There is still a chance for invention
in electric railway controlling switches.
The awkwardness OF regulating a cars
speed BY a brake which turns one way
and "a rheostat crank which turns the
other is evident. Sooner or later a love:
arm or some similar device will replace
some q the confusing number OF crank
motions with which manufacturers at
present equip their cars.
The color Of the water of the Medi-
terranean Sea varies considerably. Du-
ring storms it is deep green aud seme-
times brown, and when calm of q aeep
blue. In the Bosphorus and among tho
archipelago. it Is of varying tiuts, in
some places being of a liquid blue grad
uating into a brighter green, aud in
others assuming a blue so deep as to al
most approach a purple.