Elements of human physiology . elementsofhumanp05star Year: 1907 THE VASCULAR MECHANISM 231 sovWAAAArVAnA/V/XA AAA / Pulse-curves described by a series of sphygmographic levers placed at intervals of 20 cm. from each other along an elastic tube, mto which fluid is forced by the sudden stroke of a pump. The pulse- wave is travelling from left to right, as indicated by the arrows over the primary (a) and secondary (b, c) pulse-waves. The dotted vertical lines drawn from the summit of the several primary waves to the tuning-fork curve below, each complete vibration of which occupies J- sec al
Elements of human physiology . elementsofhumanp05star Year: 1907 THE VASCULAR MECHANISM 231 sovWAAAArVAnA/V/XA AAA / Pulse-curves described by a series of sphygmographic levers placed at intervals of 20 cm. from each other along an elastic tube, mto which fluid is forced by the sudden stroke of a pump. The pulse- wave is travelling from left to right, as indicated by the arrows over the primary (a) and secondary (b, c) pulse-waves. The dotted vertical lines drawn from the summit of the several primary waves to the tuning-fork curve below, each complete vibration of which occupies J- sec allow the time to be measured which is taken up by the wave in passing along 20 cm. of the tubing. The waves (a') are waves reflected from the closed distal end of the tubing; this is indicated by the direction of the arrows. It will be observed that m the more distant lever (VI) the reflected wave, having but a slight distance to travel, becomes fused with the primary wave. (From Foster, after Marey.)
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