Published 20 February 1923; copies deposited at Library of Congress 16 March 1923.
Later printings issued in Pocket (with new title page) and Five cent pocket series wrappers.
Contents
Einstein the man -- Galileo's position in science -- Sir Isaac Newton -- Tycho Brahe and Kepler -- Sir William Herschel -- Archimedes -- Sir Oliver Lodge -- Euclid -- The Copernican theory.
