Charles Verdin model spirometer with dials calibrated in centilitres, litres and decalitres, by Boulittle, 7 rue Linne, Paris, France, 1880-1930. Charles Verdin model spirometer with dials calibrated in centilitres 1880-1903
"Pneumameter" portable spirometer, in case, by Oliver Pell Control Ltd., London, SE18, England, 1917-1935. Serial number 1534. "Pneumameter" portable spirometer 1917-1935
Modular enclosure containing Roche spirometer module with digital display, for use in an intensive therapy unit, supplied by Kontron Instruments Ltd. 1979 Modular enclosure containing Roche spirometer module with digital display 1979
Monaghan pulmonary function analyser (electronic spirometer) model 403, by Hospal Medical Corporation, Colorado, USA, 1977 Monaghan pulmonary function analyser (electronic spirometer) model 403 1977
A pulmometer or type of spirometer, with instructions, by Godart, 149-153 Utrechtseweg, Utrecht, Netherlands, 1945-1955. Pulmometer by Godart 1945-1955