Cantilever Pneumograph

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Abstract
A simple device utilizing a resistance wire strain gauge for the recording of respiratory movements is described. Changes in chest and diaphragmatic tone may be recorded in spite of the variations in ambient temperature which markedly affect conventional bellows‐type pneumographs. Greater sensitivity is obtained and leaks in the system are not a problem. The frequency response is well above the respiratory rate of panting animals. Finally, the cost is minimal.