Photographer unknown2018-09-212018-09-211932http://172.16.52.76:80/cdm/ref/collection/coll8/id/100https://hdl.handle.net/20.500.12111/1293At the Mt. Wilson Observatory in California, (from l. to r.): Albert Einstein, his assistant, Walther Mayer, and astronomer Charles Edward St. John.SepiaThis 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=enEinstein, Albert, 1879-1955Mayer, W. (Walther), 1887-1948St. John, Charles E. (Charles Edward), 1857-1935Mount Wilson ObservatoryImage