49 Over this aperture paste one or more pieces of white or light blue tissue paper. This little piece of apparatus will print the picture the shape of your aperture, … and the light entering through the teeth- like slots and tissue paper will diffuse itself in such a manner that the edges of the print will not be too abrupt.
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Works. Popular edition.] 2 series (1886)](https://img.insideoutlibrary.com/img/200/bl-bl_003191336_5-348-1.webp)
