Plethysmograph, 1963, Constant Pressure-type

plethysmograph_1963_constant_pressure

A constant pressure-variable volume plethysmograph that appears to have been based on the design of Mead and Emerson.  From a doctoral thesis, “Acute effects of inhalation of cigarette smoke on pulmonary mechanics” by John M. Miller, University of Edinburgh, Edmonton, Canada, 1963, page 18.

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