Photographer unknown2018-09-212018-09-211923http://172.16.52.76:80/cdm/ref/collection/coll8/id/155https://hdl.handle.net/20.500.12111/1121In Leiden (Netherlands), photograph of (front row from l. to r.): Arthur S. Eddington and Hendrik A. Lorentz, and, in the back row (l. to r.): Albert Einstein, Paul Ehrenfest, and Willem de Sitter.B&WThis item is protected by copyright and/or related rights. However, for this item, either (a) no rights-holder(s) have been identified or (b) one or more rights-holder(s) have been identified but none have been located. Researchers are free to use this item in any way that is permitted by the copyright and related rights legislation that applies to their use. For more information, see https://rightsstatements.org/page/InC-RUU/1.0/?language=enEddington, Arthur Stanley, Sir, 1882-1944Ehrenfest, Paul, 1880-1933Einstein, Albert, 1879-1955Lorentz, H. A. (Hendrik Antoon), 1853-1928Sitter, Willem deImage