Karl von Vierordt used his “expirator” to collect exhaled air and then measured volume by immersing it and seeing the volume change in water.
From http://www.timely-cost.eu/sites/default/files/ppts/tempProcSenses/talks/Wearden.pdf
Karl von Vierordt used his “expirator” to collect exhaled air and then measured volume by immersing it and seeing the volume change in water.
From http://www.timely-cost.eu/sites/default/files/ppts/tempProcSenses/talks/Wearden.pdf
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