Paul Weyrich with the ruling engine he constructed for ruling Infra-Red grating

Paul Weyrich with the ruling engine he constructed for ruling Infra-Red grating. It was based upon Rowland's engine., Credit Line: AIP Emilio Segrè Visual Archives
Abstract/Description: Paul Weyrich with the ruling engine he constructed for ruling Infra-Red grating. It was based upon Rowland's engine.
Subject(s): Full-face
Equipment and supplies
Weyrich, Paul
Credit Line: AIP Emilio Segrè Visual Archives
Catalog ID: Weyrich Paul F1