2 pages, small 4to, on rectos only of two sheets graph paper, edges slightly browned, right-hand margin of each sheet slightly irregular (where removed from a notebook); both leaves de-acidified, professionally conserved and mounted in conservation mats; quarter black morocco clamshell case. " /> EINSTEIN, Albert. Autograph manuscript, two leaves respectively headed "Statische Probleme," and "Perihelbewegung des Merkur," comprising lecture notes for his course on General Relativity at the University of Zurich, Summer Semester, 1919. Zurich, 1919. <I>2 pages, small 4to, on rectos only of two sheets graph paper, edges slightly browned, right-hand margin of each sheet slightly irregular (where removed from a notebook); both leaves de-acidified, professionally conserved and mounted in conservation mats; quarter black morocco clamshell case.</I> | Christie's