The SciencesJune 21, 1913
The Double and Binary Stars
Over Ten Thousand Twin Stars Are Known
Stories by F. W. Henkel
The SciencesApril 1, 1911
New Theories of the Evolution of Stellar Systems
Successors of Kant and Laplace
The SciencesSeptember 10, 1910
Is Matter Eternal?
An Answer from the Modern Physical Standpoint
The SciencesJuly 16, 1910
Numbering the Stars
The Astrographic Chart and Catalogue
The SciencesMarch 12, 1910
Astronomy and Astrology
The Development of Astrology.
The SciencesDecember 11, 1909
Venus as the Abode of Life
The Mystery of A Cloud - Veiled Planet
The SciencesMay 15, 1909
Life in other Worlds
The Interpretation of Planetary Markings
The SciencesMay 8, 1909
Is There a Trans-Neptunian Planet?
The SciencesApril 13, 1907
Halley's Comet