Outlines of the Earth's History_ A Popular Study in Physiography

The Mystery of Space A Study of the Hyperspace Movement in the Light of the Evolution of New Psychic Faculties and an Inquiry into the Genesis and Essential Nature of Space

Cornell Nature-Study Leaflets Being a selection, with revision, from the teachers' leaflets, home nature-study lessons, junior naturalist monthlies and other publications from the College of Agriculture, Cornell University, Ithaca, N.Y., 1896-1904

Chapters of Bible Study A Popular Introduction to the Study of the Sacred Scriptures