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Various

"Scientific American Supplement, No. 312, December 24, 1881"


The small amount of labor and cost of working the above apparatus will
compare favorably with the production of the electric light from a
dynamo-electric machine for the photographer, and when we consider
that the cost of the whole of the above apparatus, consisting of a
generator automatic lamp, reflector, and all the necessary
appendages, is less then one-tenth of the dynamo machine, motor,
shafting, etc., to produce the same result, it would seem to have a
greater claim for its adoption with those who wish to employ the
electric light, whether for work at night, use in the sitting room, or
to assist daylight on the dark and foggy days of winter.
Fig. 2 shows the arrangement of the electric lamp. A is the automatic
regulator; B, the reflector; C, top extension of the reflector; D,
small tissue paper screen to prevent the intense arc-rays from coming
in contact with the sitter; E, stand with sliding rod. This appendage
can be wheeled about with ease, as it is arranged to run upon four
casters.
When the generator is in use it may be placed within easy reach of the
operator, so that the exposure may be made by lowering the elements in
their troughs just for the requisite time, and withdrawing immediately
the exposure is made; there is no need to fear any inconvenience from
deleterious fumes as none are given off, so it may be used in any
studio or sitting-room without any inconvenience from this source, and
as far as many trials have gone, it seems to meet every requirement
demanded by the photographer for the production of portraits by means
of the electric light.


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