“The use of this latter-type spirometer is depicted in figure 3. The combustion chamber, A, and motor-blower, C, are connected with the fittings at the bottom of the spirometer. The air is conducted from the combustion chamber through the pipe, b, with it “metal-to-metal” connections, is forced upwards through the soda-lime in the can, B, and passes into the spirometer bell, D, and then down around the soda-lime can and out through the fitting coneecting directly with the blower, C.” Taken from Benedict G, Fox EL. A method for the determination of the energy values of food and excreta. pg 795. Publication unknown.
Taken from: Kansas State College of Agriculture and Applied Science. Technical Bulletin 36, June 1934. The relation of Phosphorus deficiency to the utilization of feed in dairy cattle.
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.
