The Lunarian Professor and His Remarkable Revelations Concerning the Earth, the Moon and Mars / Together with An Account of the Cruise of the Sally Ann

The narrator encounters a Lunarian professor who describes the moon and Mars and offers futurist political and social predictions. He explains lunar structure: a high, uninhabitable near hemisphere and vast underground cavities on the far side, inhabited and lit by engineered electric light powered by gravity-driven machines. The book blends speculative natural history of Mars — its canals and moons — with proposals for giant cables, an audacious scheme involving Mars, and a framed sea voyage. Interspersed are visions for earthly reform: taxation, currency and land policy, women's rights, marriage and divorce, a universal language, and various technological and political forecasts.