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Transformer for carbon arc lamp

Transformer for carbon arc lamp

circa 1917-1919
Carbon arc lamp for use with the N.P.L. horizontal projector.

Carbon arc lamp for use with the N.P.L. horizontal projector

circa 1917-1919
N.P.L. Horizontal projection machine, without stand or screen; dated 1916 ( a sliding plate and vertical adjustment component is missing).

N.P.L. Horizontal projection machine

circa 1917-1919