The SciencesDecember 15, 1917
Companions of the Sun—II
Some of the More Intimate Features of The Solar System
Stories by Albert D. Watson
The SciencesDecember 8, 1917
Companions of the Sun—I
Some of the More Intimate Features of the Solar System
The SciencesMay 10, 1913
Calendars, Ancient and Modern
Fitting Our Time Unit to Astronomical Constants