- A Vintage machine shop manufacturing history project.
- Amos Woodward's smallest water wheel governor manufactured.
- THE JAMES LEFFEL & COMPANY HISTORY PROJECT.
- A hydroelectric power plant history project.
- Published by the James Leffel & Company.
- PAGE 1. PRINTED IN 1887 BY THE JAMES LEFFEL & COMPANY.
- JUNE 1887. PAGE 2.
- 3
- 4
- 5
- Leffels' Improved Turbine Water Wheel advertisement from June 1887. Page 6.
- 7. Barns Tool Grinder Rockford. 1887 ad.
- 8
- JUNE 1887. PAGE 9.
- 10