From a powerpoint presentation entitled “A la decouverte … du souffle” by Jean-Francois Dessanges. The title translates approximately as “the discovery was breathless”. This spirometer is from a G. Boulitte, Paris catalog dated 1942.
From a powerpoint presentation entitled “A la decouverte … du souffle” by Jean-Francois Dessanges. The title translates approximately as “the discovery was breathless”. This spirometer is from a G. Boulitte, Paris catalog dated 1942.