Physical and natural therapeutics : the remedial uses of atmospheric pressure, climate, heat and cold, hydrotherapeutic measures, mineral waters, and electricity / by Georges Hayem; ed. by Hobart Amory Hare.

  • Hayem, G. (Georges), 1841-1935.
Date:
1895
Catalogue details

Licence: Public Domain Mark

Credit: Physical and natural therapeutics : the remedial uses of atmospheric pressure, climate, heat and cold, hydrotherapeutic measures, mineral waters, and electricity / by Georges Hayem; ed. by Hobart Amory Hare. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    for ventilation. Tiic former is connected with tlie hydraulic com- pressor of Fontaine, constructed after the one employee! in the mines of Chemnitz. The air escapes through the ventilating-tube, which arises from the upper part of the chamber. At a single sitting of two hours an individual consumes 8000 litres of air. The changes Fig, 1. Fontaine's Modification of Tabarie's Pneumatic Chamber. in pressure are effected very gradually by means of stopcocks, and, as a rule, an increase of pressure corresponding to two-fifths atmos- phere is not exceeded. Physiological Efeds. In studying the effects of compressed air, we shall confine ourselves solely to the consideration of those produced by the aerotherapeutic apparatus. As the results of treatment by compressed air make themselves felt especially upon the respiratory organs, it is important to under- stand how the variations in the vital capacity of the lungs and in the forces of expiration and inspiration are estimated. The vital ca- pacity of the lungs is measured by an apparatus known as the spi- rometer ; that invented by Hutchinson, and first modified by Wintrich and subsequently by Schnepf, is the one most widely employed. Recently the spirometer of Galante has come into extensive use. Instead of these somewhat delicate instruments, which have the fault that they do no always register correctly, Dupont proposes the