III.—[The Relativity of Uniform Motion]: Classical Ideas on the Subject; the Ether and the Apparent Possibility of Absolute Motion; the Michelson-Morley Experiment and the Final Negation of this possibility. By various contributors and the Editor 47
IV.—[The Special Theory of Relativity]: What Einstein’s Study of Uniform Motion Tells Us About Time and Space and the Nature of the External Reality. By various contributors and the Editor 76
V.—[That Parallel Postulate]: Modern Geometric Methods; the Dividing Line Between Euclidean and Non-Euclidean; and the Significance of the Latter. By the Editor 111
VI.—[The Space-Time Continuum]: Minkowski’s World of Events, and the Way in Which It Fits Into Einstein’s Structure. By the Editor and a few contributors 141
VII.—[Relativity]: The Winning Essay in the Contest for the Eugene Higgins $5,000 Prize. By Lyndon Bolton, British Patent Office, London 169
VIII.—[The New Concepts of Time and Space]: The Essay in Behalf of Which the Greatest Number of Dissenting Opinions Have Been Recorded. By Montgomery Francis, New York 181
IX.—[The Principle of Relativity]: A Statement of What it is All About, in Ideas of One Syllable. By Hugh Elliot, Chislehurst, Kent, England 195
X.—[Space, Time and Gravitation]: An Outline of Einstein’s Theory of General Relativity. By W. de Sitter, University of Leyden 206
XI.—[The Principle of General Relativity]: How Einstein, to a Degree Never Before Equalled, Isolates the External Reality from the Observer’s Contribution. By E. T. Bell, University of Seattle 218
XII.—[Force Vs. Geometry]: How Einstein Has Substituted the Second for the First in Connection with the Cause of Gravitation. By Saul Dushman, Schenectady 230