Photographer unknown2018-09-212018-09-21undatedhttp://172.16.52.76:80/cdm/ref/collection/coll8/id/233https://hdl.handle.net/20.500.12111/1289An unidentified man shown posing with a Heyrovsky Polargraph.B&WPermission to use this image must be requested from the Institute's Archives. Please contact archives@ias.edu.Image