This edition was translated from the third German edition of 1918, but with Appendix III, on "The Experimental Confirmation of the General Theory of Relativity," having been written specially for this translation.

Octavo, 168 pages. In Very Good condition, lacking the scarce dust jacket. Bound in publisher's full blue cloth with gilt lettering to spine and front board. Gilt on spine dulled. Light shelf wear and rubbing, light bumping to corners. Light discoloration to frontispiece and title page. With frontispiece of Einstein by Hermann Struck. Shelved case 10.