The following volumes are in preparation:
Meteors and Comets. By Professor C. A. Young, Princeton University.
The Measurement of the Earth. By Professor C. T. Mendenhall, Worcester Polytechnic Institute, formerly Superintendent of the U. S. Coast and Geodetic Survey.
Earthquakes. By Major C. E. Dutton, U.S.A.
The History of Science. By C. S. Peirce.
Recent Theories of Evolution. By J. Mark Baldwin, Princeton University.
The Reproduction of Living Beings. By Professor Marcus Hartog, Queen’s College, Cork.
Man and the Higher Apes. By Dr. A. Keith, F.R.C.S.
Heredity. By J. Arthur Thompson, School of Medicine, Edinburgh.