. Carnegie Institution of Washington publication. 24 METABOLISM DURING WALKING. B. FIG. 3.—Respiration counter. A, spirometer frame; B, cord from spirom- eter-bell leading to counterpoise; C, fiber sleeve; D, D\, mercury cups; E, E\, platinum-pointed fork for com- pleting the circuit through D and DI; F, stop; G, leads to electrically operated counter shown in fig. 4. Ventilation recorder.—The total volume of air drawn into the lungs was registered by means of an attachment previously described,1 and commonly referred to as the "ventilation ; This consists of an aluminum wheel
. Carnegie Institution of Washington publication. 24 METABOLISM DURING WALKING. B. FIG. 3.—Respiration counter. A, spirometer frame; B, cord from spirom- eter-bell leading to counterpoise; C, fiber sleeve; D, D\, mercury cups; E, E\, platinum-pointed fork for com- pleting the circuit through D and DI; F, stop; G, leads to electrically operated counter shown in fig. 4. Ventilation recorder.—The total volume of air drawn into the lungs was registered by means of an attachment previously described,1 and commonly referred to as the "ventilation ; This consists of an aluminum wheel (w, fig. 1) attached to the apparatus in such a manner that each down- ward movement of the spirom- eter-bell due to inhalation by the subject moves the wheel upward. By means of a signal magnet, each revolution of the wheel is recorded upon the kymograph. From this graphic record and the volume corresponding to a revolution of the wheel, the total inspira- tory Ventilation Can be CalcU- FlG- 4.—Electrical counter for recording number of I j ~ •, i respirations. For operating device and con- lated. At first the pulmonary nections with the apparatus, see fig. 3. ventilation during grade walk- ing was found by actual measurement of the pen tracings on the kymo- graph, but later with the ventilation adder. The ventilation data secured have been reduced to standard conditions for temperature and pressure for recording in the tables. Mouthpiece.—The mouthpiece used was of the Denayrouse At the beginning of the study strips of surgeon's plaster across the lips 'Benedict, Deutsch. Archiv f. klin. Med., 1912, 107, p. 176; see also Carpenter, Carnegie Inst. Wash. Pub. No. 216, 1915, p. 40. 2P. Regnard, Recherches experimentales sur les variations pathologiques des combustions respiratorires, Paris, 1879, p. 286; also Carpenter, Carnegie Inst. Wash. Pub. No. 216, 1915, p. Please note that these images are extracted from scanned page images that may have been digital
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