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- Aeronautics--United States--Experiments.1
- Astronomical observatories.1
- Astronomy.1
- Children.1
- Curiosities and wonders.1
- Dollhouses.1
- Electric currents.1
- Electric lighting--History.1
- Electric lighting.1
- Electricity--Exhibitions.1
- Electricity.2
- Engineering.3
- General Electric Company.1
- Housing.1
- Inventions.2
- Inventors.2
- Lightning--Experiments.2
- Lightning--Research.1
- Michelson, Albert A. (Albert Abraham), 1852-1931.1
- Millikan, Robert Andrews, 1868-1953.1