Courier Democrat. (Langdon, N.D.) 1891-1920, 1893-02-02
IN THE ELECTRICAL WORLD.


The Greenwich (Eng.) authorities
have found that the exact period of
transmitting an electric signal to Mon
treal, Canada, is about three-fourths of
a second.
The telephone line between New
York and Buffalo, distance of $50
miles, which has worked admirably for
a long time, is built of copper wire
weighing about 1875 pounds to the mile.
1t is proposed to run cars between
Boston and Lynn by electricity, and the
company has asked permission to in
the improvement into effect.
In the Wheatstone automatic
method of telegraphy, when transmit
ting at the rate of 600 words minute
there are $4,000 currents per minute
sent out, each having duration not ex-
ceeding 002 of a second.
Many explosions in Touring mills
are said to have been caused by electric
ity generated by belts Even ordinary
belts are found to generate sufficiently
strong currents to perform the common
experiments for which electric machines
are used.
Only three persons We're killed by
electric light plants in Massachusetts
last year. Eleven persons lost their
lives by not turning off the gas. Now
if we knew how many persons were
killed by kerosene explosions, and how
many died from sunstrol1e, we could
readily judge what kind of life is the
most hazardous.
The statistics of the Postes ct Tele-
graphes, which have just appeared,
give 1000 as the number of submarine
cables in use all over the world. The
cost of these cables is about 500, OO0,.
600. Of those which belong to govern.
ments. Denmark owns SO; England
104; Germany, IS; France, 46; Greece
As; Italy, %; Spain, s: Brazil, 10; India
~, and Norway, no less than 2S6.
Electricity is now being much usec
for the unloading of lumber and othe,
freight from vessels in conjunction
with a whip hosting drum. The power
used is an electric motor, which is con
nected by a belt with the shaft which
operates the drums. Each drum is
operated by lever and can be stopped
in an instant. When the lumber is
drawn from the vessel large hool
from the wharf derrick is attached ant
the sticks are transferred to any part O.
tho yard. The entire pulling, twist
ing and transferring is done by electric
power.
The erygmatoscope is an instru
ment designed by M. Trouve for the ex
animation of geological strata pierced
by deep boring. The apparatus consist:
simply of powerful electric incandes
cent lamp, inclosed in a cylindrical case
one of the curved sides of which serve:
as reflector, while the other, made O
thick glass, permits the illumination o
the bore hole. An elliptical mirror, Sc
at the bottom of the case, throws it.
images vertically upward through thu
open top of the case to the observer
who examines them with powerful
telescope. 1t is said that the appnratu
works satisfactorily ITO depth of LOO
feet" and that the Portuguese govern
ment supplied it to its Mozambique ex
| petition. Electrical Review.
Two immense travelling cranes. op
Grated by electricity, have within
brief period been in operation in tn
erecting shops of the Baldwin locomo
tive works. The shop covers almos
the entire block, a space OF 3337xl5G feet
Each crane is of TWEEN weight feet span
and fitted with two trollcys, each o
which is capable of lifting fifty tons
the capacity of each crane thus being
one hundred tons. It's the largest pal
of cranes in the world. and but on,
crane, that in the gun works at tn.
arsenal in Washington, excels either o
them in power. The electric power i!
furnished by two observation-disclosures
power generators, driven by Westing
house compound engines, which art
placed in a separate apartment, partly
walled off at the western end of thu
erecting building.