This volume covers one of the most thrilling two-year periods in twentieth-century physics, as matrix mechanics—developed chiefly by W. Heisenberg, M. Born, a

A translation of selected non-English texts included in Volume 15 is available in paperback. Since this supplementary paperback includes only select portions of

The first publication of Albert Einstein’s travel diary to the Far East and Middle East In the fall of 1922, Albert Einstein, along with his then-wife, Elsa E