. A practical treatise on medical diagnosis for students and physicians . Weeds cyrtometer. Fig. 149. MANN & 4 5-6 7 i. Warrens conformator. The shape of the parts of the chest may be estimated by means of theconformator. AVarrens conformator consists of two hard-rubber or metalbraces which have been grooved to receive a number of blunt-pointed 478 PHYSICAL DIAGNOSIS OF DISEASES OF THE LUNG. needles. These needles move up and down easily and when applied toan undulating surface will conform to that surface, preserving the exactshape of the depressions and elevations. (Fig. 149.) Spir
. A practical treatise on medical diagnosis for students and physicians . Weeds cyrtometer. Fig. 149. MANN & 4 5-6 7 i. Warrens conformator. The shape of the parts of the chest may be estimated by means of theconformator. AVarrens conformator consists of two hard-rubber or metalbraces which have been grooved to receive a number of blunt-pointed 478 PHYSICAL DIAGNOSIS OF DISEASES OF THE LUNG. needles. These needles move up and down easily and when applied toan undulating surface will conform to that surface, preserving the exactshape of the depressions and elevations. (Fig. 149.) Spirometry. The object of spirometry is to ascertain the respiratoryor vital capacity of the lung, the quantity of air taken in with each in-spiration and discharged with each expiration. The estimation is madeby means of the spirometer. Hutchinsons spirometer is constructed onthe gasometer principle ; Barnes is much simpler. The data ascertained Fig. 150.
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