Daily Kennebec journal. [microfilm reel] (Augusta, Me.) 1870-1975, 1913-06-24
Cold Light.

If YOU love darkness better than
light In hot weather, it may be that it
is because light is so warm and Not
because your deeds are evil. But with
this marvellous "eold light" you can
have 10 such excuse. Discussing 1t in
an article in Harper's Magazine for
July. Francois Dessaud says:
cold light enjoys five principal ad-
vantases over ordinary light. In the
first place there is no danger OF 1t
burning or setting anything on IRE.
Concentrating lenses ard refiectors are
employed with the result that the
lamps consume hundred TIMES
less current than any other elec-
trie light of the same illuminating
power. Again. it can be produced by
any kind of electric system. Foufthiy
if YOU cannot use the city electricity.
tiny battery or ar inexpensive pocket
aceumulator will do, or you can OBTAIN
sufficient motive power from the hltch-
en- faucet, a gas-burner, or petroleum
lamp: and if all these means 1all' lhe
foot or any small animal---a squirrel In
a turnng-cag for instance-wiil TURN
jsh all the needed motive power, 1o1, DIS
has lust been stated, this lamp requires
a hundred times less current than the
ordinary electric lamp. The NTH ana
final advantage is found in the Iact
that this light contains ultra-vfoiet
RAYS. obtained for the first time WIN
ont heat with a hundred times less
electricity than is required by other
methods. The full Importance OF TINS
will be realized when it is remembered
that these rays are being employed
more and more every day in medicine
and chemistry for syntheses steriii@a-
ton, and germicides
Because of these five advantages,
cold light has so far been enpioseo
in the following ways: 1t Is very uselei
in projecting lantern slides. ESceiieh.
dissolving views, or the sudden appear
auce on the screen of persons or st'afs'
can be obtained because of the 1eeplc
current required and the simultaneous
cmployment of several lanterns, each
provided with a very small communal
TOR in place of shutter. until now al
ways used for this purpose. where
formerly two lanterns were with dim
GUILTY broupht into action, because the
Iiyht had Ia be watched and regulated
,rbi,e tho shutters produced rough and
uneven effects, you can now, WITHOUT
any trouble, have recourse to as many
cold Light lanterns as you IKE, Tue ii6i.
recurring no regulating, and comihu-
tators replacing the shutters, the re-
sult being that effects are produced
gradually throughout the whole proJee-
tir,n with an unprecedented beauty,
TINS realizing a veritable vision OF art.
Furthermore. YOU can produce coioTea
shadow pictures by inserting diiterehl
tinted glass in each lantern; auto
chrome transparencies IN natural cor
ors can be projected with great bril-
liancy. and many interesting selehtillc
experiments can be conducted.
cold light is also useful for mill
tary purposes, for now every soiu,e,
can have in his knapsack the apparatus
necessary for optic telegraHhS. foi mn.
itary and naval searchlights colo iish.
furnishes divergent beams IN sueh d
mass tina. they constitute Neillaoie
eyes for submarines. flying machines
and balloons Of all kinds. AT expert
ments made recently in Paris IN the
nresence of the Minister of War, THESE
search lights sent forth such power
full streams of light that 1t was pain
they could be used successfully loi
succoring the wounded or the pat.ie-
field. for searching in the runs Oh
fire. in mine disasters. shipwfecks' e.e
The important part played by seaien,
lights in the recent Balkan war As stu
fresh in the public mind. ana there y
| every reason to believe that their TON
| will be still greater in future cohiiie.s
when. in order to escape hyihs nc, 20
| chimes "Reminiscences, battles VIII on.
| en- take place in the night. In TACT, sh'
| Cold Light Works in the Boulevard a.
| charonne, Paris, are busy at tins mo
| ment manufacturing searcIi-Hgnis 10
| the French colonial service, as II ma
beer found that instead of eight muie
now needed TO transport search-hsh
| and its accessories, one or two mule
| suffice fact the Importance Of whicl
cannot be exaggerated from the mill
tary point of view.
IL