1922 Rotogravure Einstein Theory of Relativity Telegrafenberg Postdam Historic

This is an original 1922 sepia rotogravure of Albert Einstein, and an image of a tower erected on the Telegraphenberg at Potsdam, Germany. The caption writes, "Einstein's theory involves a very fundamental alteration both of our theories of gravitation and ether and of our whole conception of time, space, mass and motion. Of special interest in connection with the theory is this tower erected on the Telegraphenberg at Potsdam, Germany, to test the doctrine of relativity. The coelostat rests on a wooden tower forty-six feet high, encased in a stone tower, at the base of which is a fully equipped modern physical laboratory." CONDITIONThis 89+ year old Item is rated Very Fine ++. Light aging throughout. No natural defects. No surface rub. No tears. No water damage. Please note that there is print on the reverse. Product Type: Original Rotogravure; Sepia Grade: Very Fine ++ Dimensions: Approximately 9.75 x 15 inches; 25 x 38 cm Authentication: Serial-Numbered Certificate of Authentici