Scholander 1/2 CC Gas Analyzer
Designed in the 1940s by P.F. Scholander, this was used for precise volumetric analysis of respiratory gases. Mechanical parts were made by Otto Hebel, Instrument Maker at Swarthmore College, when Laurence Irving and Scholander were there. Glass part was blown by Jim Graham at the University of Pennsylvania. Donated by Knut Schmidt-Nielsen, Duke University.