Inside Out Library · Explore
A handbook on the teeth of gears, their curves, properties, and practical construction (1890)
Grant, George B. (George Barnard), 1849-1917 · Lexington, Mass., Lexington Gear Works · leaf 11

Gearing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
More pictures from A handbook on the teeth of gears, their curves, properties, and practical construction
More like this