Part 3 — Filing Flat Surfaces
Reading edition
Anyone who has used a file knows what skill is required to produce flat surfaces. A fixture which is nothing more than a mirror properly placed enables the operator to sight along the file and see at all times just how the file is running.—Contributed by A. F. Stearns, Madison, Wis.
The File can be Seen in the Mirror and Its Direction Controlled for Filing Flat Surfaces