Huntsville gazette., 1891-05-23
IN THE ELECTRICAL WORLD.

IN THE ELECTRICAL WORLD.
Laundry irons are now heated by
electricity, to the great satisfaction OF
the ironers-
1t is stated that excellent wool has
been made from the fiber of the fir tree
by means of electricity.
The submarine cables of the world
stretch over 100, 900 nautical miles, and
have cost $500. 600, 900.
The steam turbine has been applied
recently at the United States torpedo
station at Newport, R. l., to the run
ing of dynamo for electric light The
dynamo is intended for normal speed
of 5000 to 10, 900 revolutions a minute.
The appliance is regarded as success.
The king of 1yurtemberg has be-
slowed the gold medal for art and
science upon Paul Reisser, a noted
Stuttgart electrician. Mr.. Reisser is
one of the pioneers of electric lighting
in Germany. He has successfully car.
ried out a large number of public and
private installations in every part OF
Wurtemburg, and the electric lighting
of the royal residence at Friedrich
shafen is under his personal charge.
The Elektro-Technische Zeitung
says that any safe, however strong, can
be opened in the space of thirty min
utes through the use of electricity.
Connect the safe with one pole of the
electric machine, put a carbon point on
the other pole, place the latter against
the safe, and in few minutes the iron
will be quite soft and easy to cut. The
whole affair can be managed in very
short time, and without any noise or
smell Burglars, as rule, would not
even have to cucumber themselves
with tools, as many banks are fitted
with the electric light, thus providing
all the requisite Implements
The first electrical launch ever
built for the English government was
recently sent off the stocks into the
Thames, near Kew Bridge Station. The
Electric, as the pinnace is called, is to
be used for the conveyance of troops
between the dock-yards of Chatham and
Sheerness. The Daily News describes
the motion of the boat as delightfully."-
smooth-the very poetry of motion. F"
With her forty fully equipped soldiers,
she can run at a speed of eight knots an
hour. A single charge of electricity en-
ables her to run for ten hours.
A method for testing the hardness
of iron and steel while in process of
manufacture has been invented by Mr..
G. A. Caspersson, Forsbacka Ironworks,
Margretshill, Sweden. The inventor,
it is said, conducts current of cleo
tricity through test piece of iron or
STEEL letting it melt the same, upon
which the strength of the current ne
cessitated in the operation is compared
with the strength of current required
for the fusion of standard piece Of
metal of determined degree of hardness,
and of the same diameter as the piece
to be tested The hardest piece will
resist longest, but will melt if the cur
rent be maintained sufficiently long.
By the aid of an ampere meter, metals
of varying hardness may be tabulated,
so as to furnish scale, it is said, of
hardness.
-Ferranti's last report on his work at
Deptford, Eng, which was published
in the London Electrical Review, is re-
produced in several American electrical
papers. According to this document the
distribution of alternating currents
with a primary pressure of 10000 volts
is now demonstrated success Four
Ferrenti concentric mains, having a to-
tai length of about 25 miles, now con-
| meet the London system with the Dept
ford station. These conductors have,
through their entire length. as many as
$500 joints, and, it is stated, are in daily
service under a pressure of 10000 volts.
Mr.. Farrenti claims that the working is
SO satisfactory that no disturbance what
ever is caused to the telephone or tele-
graph system; that, in fact, neither the
postoffice nor the telephone company is
able to say when the machinery is
working.