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The sidereal messenger : a monthly review of astronomy

Photographs of nebulae with 60 inch reflector 1911-1916

Publications of the Cincinnati Observatory

Circular

Celestial objects for common telescopes

Astronomy for schools and general readers

Astronomy with an opera-glass: a popular introduction to the study of the starry heavens with the simplest of optical instruments, with maps and directions to facilitate the recognition of the constellations and the principal stars visible to the naked eye

An introduction to astronomy; designed as a text book for the students of Yale college

Photo-electric photometry of stars

Photo-electric studies of four variable stars