Daily Kennebec journal. [microfilm reel] (Augusta, Me.) 1870-1975, 1913-07-04
PRODUCES LIGHT WITHOUT
HEAT.
Gold" Flame Eliminates the Element
of Peril.

Light can be dangerous. There are
times when, either through its intensity
or by reas of the heat that il gener-
ated in its making, the blessing may
become a menace of Il terrible sort.
One needs TO think only Of the cinema
togra ph Ia recall plenty of accidents
and disasters resulting from the handl-
ing OF light IN close proximity to in
nammable films.
Eliminating the element IF peril,
there are processes in which light. by
ia dating heat. defeats the purposes to
which ii is put. Certain delicate opera
tions of surgery arr. in this category.
So is the study Of living microscopic
organisms under the lens-and the
light And these only suggest the null
titnde of cases in which a light with
out heat would be invaluable to science.
A Paris scientist has produced what
he calls "A box OF cold light, and
according to two other authorities, APP
l,ears to have solved the difficult prob
lem in very simple and effective way.
He has already applied his device TO
the magic lantern. the acknowledgement,
the microscope, surgery and the max
ing Of luminous signs and color Pho
Biography.
The lantern is not cumbersome in
shape CT size. 1t has two. projectors,
which enable the operator To get grad
gated light effects that are impossible
in the old style instruments. Its cold
light is obtained simply by the use OF
an Intermittent current of electricity.
And 50 simple are it's requirements
that its small bulb. with metallic MA
ment. may be supplied with current
either from the ordinary house-suplN
or from a portable battery.
Most important is the apparatus
which has been devised To accomplish
the interruption of the current IN such
periods as TO give the cold result
The intermittent current causes pulsa-
tfons i'll the thread of the bulb, so that
the light is broken up into muitiludes
of swift successive flashes, as IL We're
instead of being produced in steauy
glow.
Periods of luminosity and OF rest sue
coed each other with such rapldlty thht
the eye cannot detect the break pc
tween the flashes. That is, the PERIODS
Of rest make practically no IMPRESSION
on the eve. and the effect is that of u
continuous light
Nevertheless. the intervals of rest are
| sufficient to- enable the neat sehei u
to he dissipated. The result is that the
bulb. while lighted. remains as eolu az
| q window pane. and in spite of the tact
! that the current may be one OF aoi,oi
mai Intensity. Not only safety but
cheapness is obtained AT one anu ,io
.an,a time in the manufacture of tins
contr.Nance. ,
| For experimental purposes any little
1 sat
| any electrical shop Will do the Woi H.
1t is only necessary to mark tour ionsl-
tndtnal lines on the shaft, equidistant
| from one another. with strips Oh gum
| NJ. some ether nonconducting substance
! on Them and to place thln sheet vi
| conner connected with one Of the poles
| of the battery, 50 that IL VIII eeai VA
| the slaft, to complete the appafa tus'
| The revolving OF the Sunlhieu siia
| unaer the copper brush" viii give the
interrupted current. In the applleaioh VI
his li.,ht To the cinematograph the M
| yentor not only eliminates dahsei VI
| oye,heatipg. but he expects greatly To
reduce the troublesome qulVefihs ,1i"'
| detraets so much now from the PieaS-
ure OF watching the moving pictures
| While the device with which he hopes
! to accomplish this has not Se, peeii
nerfected, il involves the use oil wv"
| projectors, as in the magic lantern
and two bands of film instead OF one
Rv means of nicely adjusted commute
TORS fixed on the revolving part OF the
machine 1t is aimed to have one image
| moving into position in its protector at
| the instant that the preceding image
| IS being transferred to the screen from
the other projeetor-on the same prin-
chile that so-ealled dissolying views
are now produced with the stereopti-
con.