- A Google Earth picture of the House on the Rock property in Wisconsin.
- Elmer Woodward's first Hydraulic Turbine Water Wheel Governor.
- Ready to degrease the unit and disassemble the contraption.
- How does this contraption work?
- Another view.
- Right out of the box.
- Engine side of the governor.
- Engine side of the governor.
- Name plate data.
- A 1960's Davey Compressor Company's pneumatic engine governor.
- Ready to take out and document.
- A pneumatic governor contraption!
- What is it?
- The latest governor project is...
- How does a pneumatic governor operate?