1910s, Basal metabolism, Spirometer Spirometer, Benedict-Roth, 1919 June 15, 2013 Richard Johnston Leave a comment F From: Benedict FG, Miles WR, Roth P, Smith HM. Human vitality and efficiency under prolonged restricted diet. Published 1919 by the Carnegie Institute of Washington.
1920s, Basal metabolism, Diagram, Spirometer Spirometer, Benedict-Roth, for BMR Measurements, 1922, Diagram May 27, 2013 Richard Johnston Leave a comment From the Boston Medical and Surgical Journal, April 22nd, 1922, Volume 186, no 15, page 499.
1920s, Basal metabolism, Photograph, Spirometer Spirometer, Benedict-Roth, for BMR measurments, 1922 May 27, 2013 Richard Johnston Leave a comment From the Boston Medical and Surgical Journal, April 22nd, 1922, Volume 186, no 15, page 494.
1950s, Photograph, Spirometer Benedict-Roth Recording Spirometer May 10, 2013 Richard Johnston Leave a comment Taken from http://www.wmhm.org.uk/spirometer,bened.html Welsh Museum of Health and Medicine