The Big Stone Gap post. [volume] (Big Stone Gap, Wise County, Va.) 1892-1928, 1893-07-13
Edison's Kiretcgrap;l.

Eds on'S Einetcgrapn.
At recent meeting Of the De
partmcnt of Physics OF the Brooklyn
Institute, the members were enabled
to examine Mr.. Edison $ new ingtru
ment, known as the liinetog:aph.
The apparatus consists OF an optical
lantern, device by which a moving
image is projected on screen sinful
taneously with the production by a
photograph Of the words or song
Which accompany tic ia"yenents
pictured Thus tie photograph OF 4
prina donna could De shown on Jl!e
screen, with the movements o. the
arms, the head and Tie body, togeth-
cr with the changes Of facial express,
sion, while the pllono@ral.h would re-
produce the song.
Mr. George NJ. IiorSiaS. president
Of the department, before proceeding
to demonstrations Of tllc instrument,
offered a brief introduction, IN winch
he said: '''This aPparuttus IS thc
refinement Of Plateau. ,I,onai<isto-
SCOPE or the zootropt. and Ike every
thing Mr.. Edison undertakes, it is
carried to perfection. The principles
can readily be understood by any
one who has ever examined the in
strumcnt | have ever mentioned.
Persistence Of vision i. lependeA up
On to blend the successive images
into one continuous ever changing
Photographic picture.
In addition to pIajeau's expert
mcnts, |, continued the speaker,
might refer to the work ucconplis!i-
ed by MuybridSe aud .\aschactz,
who very successfully photographed
animals in motion, and to Dcmeny,
who produced an instrument called
the phonoscope, which gave The ia
cial expression while words were be-
ing spoken, SO that deaf anal dumb
people could readily uH4erstand
them. But these instruments: nav
ing but rs or 30 pictures lof each
subject, could not De made is blend
the different movements sufficiently
to make the image appear like y
continues photograph Of moving
things; Tie change from one picture
to the next was abrupt and MOI real
istic. In Mr.. Elison's machine far
more peiect results are secured HE
Fundamental feature III his expert
mentS is the camera, BY means Of
which the pictures are taken. This
camera starts, moves, and stops the
sensitive strip which receives the
Photographic image iG tlnes a sec
ond, and the exposure Of The plate
in one-eisth Of this time, or il about
18th of a second. The lens for
producing these pictures was made
to order at an enormous expense, and
every detail at this end o. the cxper-
imcnt was carefully looked liter.
There are 100 Impressions on each
strip, and when these pictures arc
shown in succession III the kineto-
graph the light is Intercepted 800
times during one revolution OF the
strip. The duration Of each image
is 1872 of q second, ami the eutire
strip passes through the instrument
in about 30 seconds. In the bineto-
graph each image dwells upon the
rctina until it is replaced by the sue
cecding one, and the difference be
tween any picture and the succeed
ing one, is so slight as to render it
impossible to observe the intermit-
tent character of the picture.
70 explain in a very imperfect
way the manner in which, the photo
graphs are produced, |, remarked the
president, will present the familiar
dancing skeleton on the screen. You
will notice that the image appears to
be continuous. but the eyes fail to
observe the cutting off Of the light.
and the image simply appears f"
change its position without being at