From: Basal Metabolism: Its determination and Application. FB Sanborn. Page 123. Published 1922. Variation of a Krogh Spirometer. Described in text as being 17 inches high and weighing 40 pounds.
From Mead J. Volume displacement body plethysmograph for respiratory measurements in human subject. J Appl Physiol 1960; 15:736-740. Article generously provided by Carl O’Donnell, PhD, MPH