
The Latest Photograph of the Planet Mars

The Latest Photograph of the Planet Mars

John D. Hooker and the One Hundred-inch Reflector
A Business Man Who Took an Interest in Astronomy

Vacant Regions in the Milky Way
Herschel's "Windows of Heaven"

Total Eclipse of the Sun in January, 1907

The 1905 Eclipse of the Sun

The Amherst College Observatory

Prof. Barnard's Observations of the White Spot on Saturn

Plans for a Great Telescope

The Yerkes Observatory Two-Foot Reflector

Measuring the Heat of the Stars

Nebula in Nova Persei

Government Eclipse Expedition