Astronomy

Half-Hours with the Stars

Round the year with the stars

Curiosities of the Sky

Mars and Its Canals

Conversations on the Plurality of Worlds

Astronomy and General Physics Considered with Reference to Natural Theology

The dawn of astronomy

The World of Flying Saucers: A Scientific Examination of a Major Myth of the Space Age

The Evolution of Worlds

Lectures on Stellar Statistics

Celestial Beings

Moon Cycles