Found on the Science Museum UK website.
“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.”
First bicycle ergometer, developed by Elisee Bouny, who worked for Jules-Etienne Marey, in 1895. Photograph was dated 1896. From a 2003 PhD dissertation by Yaser Mahfouz Atwa Saad Elgohari.
An early arcade spirometer. Undated but probably from the 1890’s. (1862 is an auction number). Found on Icollector.com.
A bellows spirometer designed to provide compressed and rarified air based on the therapies developed by Waldenberg in the 1870’s. This spirometer was designed/manufactured by Biedert. Found on Flickr. Attributed to “Therapeutisches Lexikon : für praktische Ärzte”, by Anton Bum and Carl Breus, published 1891, page 676.
A Hutchinson-style spirometer with a dial read-out. Posted on Flickr by circasassy. Attributed to an A.G. Spalding & Bros. Gymnasium and Athletic catalogue from 1891. At a guess, the dial displayed the exhaled volume and was driven by the cables attached to the counter-weights that are likely hidden inside the side supports.
A calibrated bag spirometer. From Revue des Instruments de Chirurgie, 1892, page 75. Found on the Medic Database. Image med110220x1892x0075.
From Journal of surgical instruments, 1891, page 92. Found on the Medic Database. Image: med110220x1891x0088
From Physiologische graphik, By Oskar Langendorff, published by F. Deuticke , 1891, page 268. The plethysmograph is connected to a Marey tambour.
From The Minutes of the 1897 Session of the Newark Conference of the Methodist Church, Page 150.
From Patent application number 471,289 dated March 22, 1892.
“The operation of my invention is as follows: The mouth-piece a is placed in the mouth and air slowly inhaled until the lungs are completely filled. The opening S in the side of the main tube is closed by a finger of the person using the instrument and the air which has been taken into the lungs is forced out. This outward passage of air operates the valve B to close the outlet b, and the column of air, acting on the piston or plunger G, causes the same to move longitudinally in the tube E. A person can thus by repeated tests inform himself as to the increase in the capacity of the lungs by the distance the plunger is moved at each exhalation. When the instrument is removed from the mouth, the air withing the tube is forced out through the mouth-piece and the opening S by reason of the spring K drawing the plunger or piston back to its normal position.”