How to make pictures : easy lessons for the amateur photographer (1882)
Price, Henry Clay · New York : Scovill Manufacturing Co. · leaf 46
36 HOW TO MAKE PICTURES. Spring back the catch shown in figure 3, and put the ground glass and frame out of the way. Be careful not to break the former. Place the cap on the lens. Take a double dry plate holder, and turn it so that the heads of the dark slides face to the right (see fig. 14,… … out, one side of the sensitive plate would necessarily catch the light before the other, with a result not at all favorable. Or, on the other hand, a longer ex- posure than is desirable might be given. There is a proper time to doff the cap. It is after you have pulled out the dark slide B nearest…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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