St. Tammany farmer. [volume] (Covington, La.) 1874-current, 1891-06-27
m THE eLEcTR,cAl WORLD.

An expert electrician insists that
an electric train. making l25 miles an
hour. would require 1900 feet in which
| 70 come to standstill
jim the new Anglo-American tele.
phone cable tho four cores sre wound
around each other in spiral or strand
to obviate the effects of induction.
As pendant to tine opening of tel~
ephonic Communication between Paris
and London preparations are being
made for creating similar facilities OF
intercourse between Berlin and Vienna.
The national powder mill 1t St
Medard-en-Jaile in France has recently
been lighted BY incandescent lamps and
Il believed TO be the first mill of its
class on the continent to use electric
lighting.
1t Is quite likely that the executive
board of Rochester. N. Y. will decide
70 operate all of the lift bridges over
the Erie canal in that city BY electric
power. It is estimated that the neces-
sary machinery can be installed for
ts5, ,0ooI
Great interest 10 being mani-
tested by the citizens of Warrington in
the successful trial of the Edco electric
car, which is moved by . storage bat
terry called the ''accumulator." The car
moves steadily over the track and at
very rapid speed when desired. 1t will
be . succesA-Inventive Age.
AT the last meeting Of the Physical
Society in England an electric lamp
was exhibited which lighted itself when
darkness came on and extinguished
itself when daylight or another strong
light was brought into the field. Tho
lamp = worked BY selenium cell on
the principle that the strength Of the
current varies with the intensity Of
light falling ON the sslenium.
Two years and over must elapse be-
fore the worlds fair will be thrown
open to the public. says the Western
Electrician, and yet hundreds Of appli-
cations and inquiries for space have n.
ready been received BY the electrical
department This fact Is significant -
giving IN idea Of the magnitude Of tho
coming display. which II sure TO SUR
pass any exhibition Of the kind ever
given. ...,.fs
The electric lighting of Pittsburgh
IL about to be increased There arc
about 900 arc lights distributed over tho
streets Of the city. but that number has
for some time been . great deal too
small, owing to the rapid growth of tho
city. To supply this demand the de-
partment of public il now making ar
rangements for IN increase Of 16O arc
lamps, which are TO be placed on tho
thorOughfares of the south side Of tho
city.
-Aecording TO 8. z. DeFerrant's last
report on his work at Deptford. Eng
land, the distribution Of alternating
currents with . primary pressure of TO-
900 volts II now demonstrated success.
Four Fersnti coneentric mains having
. total length of about . miles. now
connect the London system with Dept
ford station. These eonduetoss havo
throughout their entire length - many
@ 6,5oO joints, and II Is stated. arc in
daily service under . pressure Of 1000
volta
"A Washington Star reporter has
been interviewing . watchmsker OF
that city in regsrd TO the effect Of elec-
tromagnetism On watches. He was
told that imagination was the principal
factor In tie ease of electric railways.
There il not one watch in 1.oe0, 900.
said the matchmaker, that il affected
By the current on IN electric street-car.
OF course there are plenty Of eases where
watches have been nagnetized BY dy-
namos and other electric machines. but
do not believe that the current Of .
street-car line can possibly eject .
watch. Some watches you can not af-
fest ss Ill By electricity, while others
70 TO pieces, - Il were, - sooo q they
are brought within ten 1eet 0eo dynar