- Engineering World of History.
- Engineering World of History.
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- Ontairio Power Company's Hydro Plant Extension History.
- A vintage machine shop manufacturing history project.
- SHOW ME THE DATA!
- ELMER E. WOODWARD'S LAHTE CENTER GRINDER PATENT NUMBER 438,876.
- Amos Woodward's pump patent number 222,116.
- Letterhead showing Elmer Woodward's Lathe-Centre Grinder Contraption.
- The back of Amos Woodward's business card.
- A vintage machine shop manufacturing history project.
- Quote...