The Nevada Democrat., 1861-07-23
The DrnmmondI LIgIla.

The Drummond Light is tins described
by Mr.. Baxter, In recent nnmber OF Re-
creative Science. 1t is often called the
Lime Light:
This brilliant light was the invention Of
Lieut.. Drumm0nd. aud was applied by him
In conducting the DrdHance Survey III
Ireland and Scotland Ia 1926. It's intensity
was such that II was proved by him TO be
distinctly visible az q distance OF ninety
i've miles. +. il 20 purely white that the
most delicate shades Of color may be dis
tinguished hy 1t a. correctly as 10y daylight;
while for Photographic purposes 10 is lnval-
uable, as il enables the photographer to
work 10y night MS easily as by day.
To what extent this light is possessed of
actinic properties, or whether this apparent
power il due 10 the total absence of color
in its composition. will leave others 10 de-
eide. | shal here only attempt to describe
the best form of lime light apparatus which
il vet known to the scientific world. The
lime light gives ont hut little heat. ana
does not in any manner Vltiate or consume
the oxygen OF the surrounding atmospheric
hence it is just the kind Of light required
for crowded rooms, factories, mines, tun"
nels; in short, wherever II Is an OlJrct 10
limit the natural consumption Of oxygen.
A. a proof of this may state that five-
Jet lamp, belonging 10 the Universal Lime
Light Company. which was exhibited ~ the
Society of Arts Lecture Room. consumed
thirty-six cubic feet Of the combined gases
in an hour. aud did not Increase the teTn-
perature Of the room during ihat length Ot
time. 1t gave more pure aud powerful
liph, than their large chandelier, which was
subsequently, lighted. and which CONSUMED
five thousand cubic feet IN the hour; the
temperature of the room kept increasing,
aud the atmosphere was vitiaied TO al nn-
bearahle degree at the end Of that period.
II is hardly necessary 10 observe that, III
common with all other lights Of great nien-
sity. il may he used for signal lights. its
peculiar steadiness and continuity giving
it the advantage over its rival the electric
light.
For use at sea, or by the coast guard in
case of wreck, aud in cases where life Gnd
property are at stake, cheapness IL matter
of no consideration for light Of this natnrei
still, where cheapness il combined with util-
ity. the lime light has precedence over all
lights, its cost being in pence where others
cost pounds. Owing To the total absence
of color, il is not only applicable to photo
graphic purposes, bnt alTO for picture gall
leries, shops, etc. 1t is found 10 separate
the most delicate shades of color, aud, what
is of more Importance. it does not in the
slightest degree injure the most delicate
fabrics.
A single jet of the medium size is equiv
alent to forty argaad, or eighty fish tail gas
lights, or four hundred wax candles; while
its cost is from halfpenny to FIVE pence an
hour. according to the quantity Of combined
gases consumed, the augmentation Of which
increases the power of the light. For in-
stance. twice the quantity OF gas consumed
per hour will give, not twice, but four times
the amount of light. Comparing it with
the Illuminating power of common gas, IA
single JET, consuming four cubic feet of the
combined gases ner hour equals that OBJ
tained from four hIndred feet Of coal gas.