Dr. Pescher’s Spiroscope was primarily a device for exercising the lungs by moving water from the upper chamber to the lower. In this case, the amount of water that could be moved was used to diagnose the extent of a disease, most likely anemia from malaria. From Bulletins de la Société de pathologie exotique et de ses filiales de l’Ouest africain et de Madagascar, 1930, tome 23, page 138.
From a Duffaud & Cie, Factory surgical instruments. Illustrated catalog, 1934, page 37. Found on the Medic Database.
A water spiroscope meant for respiratory exercises. From a Drapier et Fils Medical Supply catalog, 1929, page 26. Found on the Medic Database.
An lung exercise device, design attributed to Dr. J. Pescher. From a 1933 Guillot Medical Supply Catalog found on the Bibliotheque Interuniversitaire du Sante website.