Described as a “dial” spirometer.  It’s mode of operation was not described however appearances aside it is likely a water-seal spirometer.  Legend of illustration:

A. Dial indicator of the respiratory vital capacity.

B. Movable iron rod which serves to lower the tank after each experiment.

C. Manometer.

D. Thermometer.

G. Air entry channel.

S. D.O. positions that can give the S faucet and allowing or forbidding the entry of air into the device.

Manufacturer was not named.  From “Essai sur le spiromètre”, by Louis-Emile Hecht, published in Strasbourg by G. Silbermann, 1855.  Found on the Medic Database.