How to make pictures : easy lessons for the amateur photographer (1887)
Price, Henry Clay · New York : Scovill Manufacturing Co. · leaf 32
opening. (Do not be alarmed at these words, for you will or may ascertain such points about a lens when you purchase one.) The gelatine plates in use we will suppose to be what are called rapid, hence you decide upon fifteen seconds’ exposure, as denoted by your watch. Uncap the lens by a quick… … The plate holder can now be put in the carrying case, and indeed the whole outfit be folded into its most compact
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
