Caille coin-operated Spirometer Lung Strength Machine c1896, 11″w x 5″d x 18″h
http://live.vcaauction.com/5-Cent-Caille-Spirometer-Lung-Strength-Machine-c1896_i12244964
Caille coin-operated Spirometer Lung Strength Machine c1896, 11″w x 5″d x 18″h
http://live.vcaauction.com/5-Cent-Caille-Spirometer-Lung-Strength-Machine-c1896_i12244964
Manufactured in 1899 by the National Spirometer Company, New York City, New York.
This portable spirometer is made of brass, rubber and glass in a mahogany case. It was made by Arnold and Sons of London. The patient’s breath bubbled up a water-filled collecting glass and pushed up a sliding weight. A scale on the attached spirometer indicated the capacity of the lungs. Scientific instrument maker, Robert Mann Lowne (1844-1929) patented this portable spirometer in 1865.
from http://www.sciencemuseum.org.uk/broughttolife/objects/display.aspx?id=92216
Found on the website http://vlp.mpiwg-berlin.mpg.de
Attributed to Petzold, Wilhelm. 1891. Preis-Verzeichniss der Werkstätte für Präcisions-Mechanik von Wilh. Petzold: Abtheilung der Instrumente und Apparate für physiologische Experimente und Vivisectionen. (p. 0029, fig. 97)