- Edwin Hubble
- E. L. Trouvelot
- Agnes M. Clerke
- S. P. Langley
- William F. Denning
- James Bonwick
- Richard A. Proctor
- Harold Jacoby
- Isabel Martin Lewis
- William Gaertner and Company
- William Tyler Olcott
- Camille Flammarion
- David P. Todd
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Half-Hours with the Stars A Plain and Easy Guide to the Knowledge of the Constellations
Richard A. ProctorRead For Free - H. H. Turner
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Astronomy of To-day: A Popular Introduction in Non-Technical Language
Cecil Goodrich Julius DolmageRead For FreeCecil Goodrich Julius Dolmage -

Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction.
Richard A. ProctorRead For Free - George Forbes













