When sawing sheet metal with a hacksaw and trying to saw to a line which has been scribed on the metal, the task is found very difficult unless the light is just right. Recently a man in the shop where the writer is employed made a reflector for his saw so that it would throw a good light on the hacksaw. A round disk of brass was made as shown at A. The disk was turned so as to have a collar at the back; a slot was cut through the center of disk so that it could be slipped over the saw. A 3/16-inch set screw in the collar-served to hold the disk in place while in use. Some white enamel was spread over the face of disk to provide a good refecting surface.
This article was originally published with the title "Using a Reflector on a Hacksaw" in Scientific American 105, 11, 228 (September 1911)