Found at The Virtual Laboratory. Attributed to Verdin, Charles. 1882. Catalogue des instruments de précision servant en physiologie et en médecine construits par Charles Verdin. (p. 0043, fig. 60). Titled “Spirometer, registering the movements of the breast, the quantity of expired air and the time during which the phenomena occur.”
From a powerpoint presentation entitled “A la decouverte … du souffle” by Jean-Francois Dessanges. The title translates approximately as “the discovery was breathless”.