Schneider (Henry Rowland's instrument maker) standing over a Ruling Engine

Henry Rowland's Ruling Engine with his instrument maker, Schneider, Johns Hopkins University, Credit Line: The Johns Hopkins University, courtesy of AIP Emilio Segrè Visual Archives
Abstract/Description: Henry Rowland's Ruling Engine with his instrument maker, Schneider, Johns Hopkins University
Subject(s): Equipment and supplies
Laboratories
Optical spectroscopy
Rowland, Henry Augustus, 1848-1901
Credit Line: The Johns Hopkins University, courtesy of AIP Emilio Segrè Visual Archives
Catalog ID: Rowland Henry F6