The Appeal., 1889-10-19
SCIENCE AND INDUSTRY.

Every electric Rotor manufactory
in the United States is said to be
crowded to its utmost capacity to meet
the demands for electric power.
California. it is said, now manu-
factures nearly all the iron she needs,
though only a few years ago she de-
pended on the East for her supply.
By the new welding process, in
which electricity is used, tie rails of
street or steam railways can be welded
together, it is said, after being placed
in position,
AS many as 717,74S,854 gallons of
malt liquor were consumed in the
United States last year. Nearly all of
it was produced in the Republic, only
2,so0,oO gallons being imported.
In experiments made3ain France,
where plates of celluloid were used for
sheathing ships bottoms instead of
copper, it was found that the plates
were intact and free from marine
growth, which was abundant on parts
not protected by the celluloid.
SO thoroughly have electricians
experimental that, by q little calcula-
tion, they can compute-the number
of the ohms and the length of the wire
being known-just how powerful
battery will be needed to produce
electrical effects at the further end of
the line.
"A single kiln in the secluded town
Of San Felipe, in the Mexican state of
Guanaxuato, is produced lustred pot
terry rivaling in brilliancy the Gubbio
lustres OF the sixteenth century. Dur
ing his Mexican tour of two years ago
Charles Dudley Warner found speci-
mons of this ware, the making of which
had been supposed to be lost art.
"A volt stands in the scale of elec-
tromotive force where an inch is in the
ordinary mode of linear measurement
at the base. It may also be described
as one of the parts or sets of which an
electric battery is constructed, and
consists of plates of zinc, copper and
prepared carbon, immersed in certain
number of acids, contact with which
generates the electricity:
"A new wooden pulley has been
oontrived, the center being of cast iron
and the rim of wood. and ito is made in
two parts. tits claimed that by its use
better belt friction is, obtained and a
saving in power realized, the spokes
being. formed in such manner as to
oiIec but very slight resistance to the
motion. BY means OF nlpvel and eff
cient paper bushing, keys and set
screws are entirely done ;lway, aud the
grip upon the shafting is said to be
perfect. =
Gold storage is a s reat help to egg
dealers as it enables the perishable
product to be kept ina fair condition
much, longer than would otherwise be
the case, Dakota. and Minnesota now
ship large quantities of eggs to New
York and the eggs are stored until
needed and the older eggs are disposed
of first. When the eggs are decayed,
there is but one use to make of them
and that is to sell them to morocco
manufacturers who use the yelks in
their way of dressing morocco. .-Massa-
chusetts Plowman.
An interesting variety of carbon is
gas carbon, obtained from the retorts
in which illuminating gas is manufact-
ured. 1t results from the burning on
of drops of tar upon the interior walls
Of the retort, and the long continued
heating of the,crust thus formed. Gas
carbon is very hard, compact and
dense; il has a'metallic lustre and con-
ducts electricity like a metal. On ac-
count of it's high conducting power, it
is employed in the manufacture of gal
Vamic batteries and for the carbon
pencils OF the electric lamps.