Inside Out Library · Explore
A treatise on gear wheels (1904)
Grant, George B. (George Barnard), 1849-1917 · Boston, Grant gear works, incorporated · leaf 20
17 … 2 Pitch. 2 ^ Pitch. 3 Pitch.Gearing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
More pictures from A treatise on gear wheels
More like this
