Respiration Apparatus, Voit and Pettenkofer, 1860’s

Respiration_Apparatus_Pettenkofer_Voit_1860s

From Lehrbuch der physiologie des menschen : Unter mitwirkung der herren prof. Chapter XXII Stoff-und Kraftwechsel by Nathan Zuntz, page 638, published by FCW Vogel , 1913.

An open-circuit system for measuring CO2 production.  Developed by Voit and Pettenkofer in the 1860’s.

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