Bromide paper : instructions for contact printing and enlarging (1896)
Just, E. A · Bradford : P. Lund, Humphries · leaf 31
25 ARTIFICIAL LIGHTS. raising up the other side. The edges of the the burner round the wick and also the inside and outside air holes should be kept perfectly clean, as the intensity of the light will be considerably diminished if insufficient air be admitted. The tubes which carry away the… … Fig. 5- cheap kinds of paraffin sold, which are only made combustible by mixing heavy oils with lighter kinds. These inferior qualities of paraffin not only cause rapid choking of the wick, but also increase the liability of dangerous explosions. In lighting it is necessary to avoid any smoking…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
