- Equator, inclination of Martian orbit
- Equinoxes
- Eridania
- Eumenides
- Eunostos, the
- Euphrates
- Faraday, experiments on carbonic acid gas
- Fastigium Aryn, the
- Flammarion, Camille, 'La Planete Mars,'
- Fons Juventae, the
- Frost
- Galaxias, the
- Ganges, the
- Gases
- Gemination, of canals, (and pages following this)
- Gigas, oases on the
- Gihon, name of the
- Glacial epochs
- Glaciation cracks, theory of the canals as
- Gorgon, the
- Gravitation, law of