The Wheeling daily intelligencer. [volume] (Wheeling, W. Va.) 1865-1903, 1893-08-21

arranged on the bottom, is placed tho
electric lamp, the source OF the light
which is reflected by the mirror. 1t Is
entirely automatic in its action, is six feet
high and weighs about 400 pounds The
carbons used are also made especially
tor it. The upper or positive carbon is
one and ione.half inches in diameter
aud twenty-five ana Ona-hRlt inches
long, with five'siXleenths of an inch
core OF soft carbon running from end
to end through its centre. The lower
or negative carbon is one aud one
fourth inches in diameter, is fifteen
inches long and also has core Of soft
carbon running through Its centre. In
addition its outer surface is heavily
coated with copper The positive car
bon is SGT little in front Of the neg
alive and thus almost all the intense
light OF the incandescent crater is cast
upon the reflector. The maximum
current At which this lamp operates, is
200 ampheres, and at this current the
lamp has luminous intensity OF about
so, 900 to 100000 candles, the retiecting
beam total luminous intensity OF
about 375, 100000 candles, an intensity
which the eye cannot appreciate. In
looking ut the side Of the beam the
spectator only distinguishes a stream
OF light Of comparatively low Intensity,
but in looking at the beam d.
rectly Its brillianCy is fully seen
and the effect is absolutely binding,
Ventilalors 1.-THE top and sides allow a
constant current OF air to pass through
the drum and disslpRte the heat gener-
ated by the arc lamp; aud they are so
arranged that no light can escape
through them, All tho connections for
adjusting the positions OF tho carbons
and the lamp are brought through the
drum to the outside, and are arranged
in close proximity to one another at one
side so that all may DO manipulated by
the operator without moving from his
position. Through openings in the
drum, covered by densely colored glass,
the operation Of tho lamp may be
watched and its adjustments verified.
The drum is supported by trunions in
bearings at the top OF Y.shaped fork,
set in base plate, and the whole is sup
ported on system OF friction wheels,
forming turntablO resting upon the
top OF q massive pedestal supporting
the whole structure, The drum, fork
and base plate may be rotated horizon
tally on the turntable either by hand
or by gearing provided for this purpose.
The drum may also be elevated or de-
pressed in vertical plane by similar
gearing,
Before the protector was sent to the
Worlds Fair, q public test was made at
Middletown, Conn. From the roof OF
the works the great white beam OF light
shot forth into the obscurity of the
night, and slowly swept the country
side for miles around, bringing every
object upon which 1t was directed into
brilliant and distinctrelief. It illumin-
ated the roofs OF distant villages and
scared their inhabitants, and lighted
up the sign boards miles away, SO that
they could easily be read by means OF
glass. The protector was turned up
ward toward the sky, and tho beam,
like u supernatural divine finger, wrote
words upon the clouds-messages OF
light to the starry populations, 1t was
n majestic manifestation Of mans in
vasion OF the realm Of Phoebus.
1t was observed that the space within
the beam was violently agitated, and
closer observation revealed the fact that
millions OF moths aud minute insects
were lowering in it, attracted by the
brilliancy OF the light. Next morning
bushels Of dead moths, beetles, other
insects, and some small birds, were
swept up from the roof on which the
protector stood. They had been killed
by the intensity OF the light.
How far the powerful beam OF light
OF this instrument can be seen is diff.
cult to state. The search light set up
by the General Electric Company on
Mt. Washington, in the White Noun
tains, has a diameter OF only thirty
inches, aud a reflected light from the
mirror of about 100000 candle power,
yet newspaper can be read in its
beam ten miles away, and the light can
be seen from points 100 miles away.
How much farther then could this 375,-
100000 candle power light be seen in a
clear atmosphere free from moisture, II
the protector could be mounted upon
an emtnence sufficiently high to clear
all surrounding obstacles?