Bromide paper : instructions for contact printing and enlarging (1896)
Just, E. A · Bradford : P. Lund, Humphries · leaf 36
BROMIDE PAPER. 30 Siemen's Inverted Regenerative Gas Lamps. — Of special value for photographic copying purposes are Seimen's regenerative gas burners (fig. 8), partly on account of their extremely favourable arrangement, and partly on account of their intense and absolutely steady light. With… … Fig. 8. This arrangement enables exposures to be made on an ordinary table. By this means the rules regarding the position in relation to the axis of the rays and to the distance from the source of light can be easily and corre(5fly carried out. The intensity of this light,, even with the smaller…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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