- Electro-Magnetic Motor with Rotating Geissler...
- Large Electromagnetic Motor with Geissler Tub...
- "Menlo Park Reminiscences", 1937...
- Early Electric Motor with Sliding Resistor, c...
- 2 x Radiaver Saint-Gobain, 1937 onwards...
- Large Geissler Tube with Uranium Glass Flower...
- 4 Interesting Motors...
- Large Induction Coil by Siemens & Halske, c. ...