Abstract
I SHOULD be interested to know whether any physiologist who is also a smoker has noticed the following phenomenon, and whether it has been previously reported. Choose a quiet room, fill the mouth with tobacco smoke, and blow gently out through a very small aperture between pursed lips. Careful observation of the fine jet of smoke will show that it has a definite periodicity—that of the heart beat. With a delicately controlled jet it is even possible to make the heart blow a smoke ring at each beat.
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BEEVERS, C. Demonstration of the Heart Beat. Nature 161, 65 (1948). https://doi.org/10.1038/161065c0
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DOI: https://doi.org/10.1038/161065c0
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