Northern Wisconsin advertiser. [volume] (Wabeno, Wis.) 1898-1925, 1901-09-12

reached 4SO miles. Between Mombassa
and Nairobi, distance of about 80
miles. the communication is made by
three wires, and after the latter point
two wires are used. About forty-five
stations have been opened Between
Rialhead and Port Florence, the ter
minal station of Victoria Nyanza sec
ton, a temporary line has been con-
structed, but from Port Florence to
Eutebbe, the capital of the Uganda pro
tectorate, the line is in completed
state Instead of poles, living trees are
planted along the line. Experience
shows that the living trees are not
attacked by white ants like the poles.
The trees take root and only need to
have the branches cut off from time to
time. The wires are fixed simply by
well-tarred hemp cords, which take
the place of insulators.
Hot Boxes.
1t is commonly supposed that the
heatings of the bearings of machines
and of the axles of car wheels is due
exclusively to fiction, but Railway
and Locomotive Engineering puts for
ward the theory that it is due to an cleo
trio arc. This assumes that all re-
volving bodies generate a current Of
electricity, which, if not properly han
died, causes trouble somewhere. In
the case of a revolving shaft or axle,
it is assumed that the current gen
Grated will pass from shaft to bearing,
and IL any space exists between the
two, as it is practically bound to do,
unless the bearing is a perfect fit, an
arc is formed. AS the temperature OF
the arc is supposed to be 5000 degrees,
1t is said that. this is the reason that
many bearings heat the small size of
the arc being the reason the tempera-
ture is not raised more rapidly. Oil is
supposed to act sometimes as an in
sulator.
Acetylene for Heat and Light.
In the Mointeur Scientifique it is
stated by NJ Bourgerel that an acety
lene blowpipe with supply of oxygen
produces temperatures approaching |
those of the electric arc. The oxygen !
must however, be somewhat diluted |
The acetylene burns with a slightly |
luminous, but intensely hot flame,
which by adjusting the relative proper.
tons of oxygen and air, can be made |
either oxidizing or quite neutral. In |
the German army maneuvers an acety- |
lene light is used for optical telegra-
ply. Lime light is less convenient. |
Acetylene with oxygen gives three
times as much light as lime light, pro.
1ucing flame that is seen by day for
i've miles and by night for ten miles.
The oxygen is generated in a small re-
.ort as wanted.
Against Wrecks.
Consul Guenther, of Rockford, re-
ports an automatic system of signals
or warning vessels in stormy weather
against the proximity of reefs and
'ocks, the automatic part of theappara-
us consisting of a wheel with a num-
Der of cogs arranged at suitable inter-
Ials, which slide over a Morse appara-
us. The latter is connected with
| ladder placed vertically on ris-
ng ground on shore or on light
house. The electric waves emanating
ire taken up by receiving apparatus on
having such apparatus within
radius of seven miles. A bell sounds
md the receiver notes the spot against
which vessels should be warned.
Cheap Fuel Gas.
The gas invented by Ludwig Mond
IS to be sold at four cents per 1000
'eet 1t is made, it appears, from the
mouths of coal mines. and will be con-
veyed from the mines to consumers in
pipes. Its inventor says that by his
process ten million tons of coal will
produce as much steam power as fifty
million tons now produce. 1t is
thought that this will effect a revolu-
ton by cheapening electric power, and
1t will also have an important bearing
on the production of open-hearth steel