which traces a line on a rotating cylinder. This apparatus does not augment when the systolesincrease in number. The heart in action, the second foot will present either a shock or is represented in Fig. 1, and is called the heart myograph. same apparatus an- The lever, which is swers for… … ue calls the schematic is produced by the apparatus of the circu- heart under the influ- Cardiographic Tracings. lation; it is represented ence of a kind of sim- The heart and artificial vessels are disposed on an a tetanic contraction, according asthe inducing heart gives ple discharge of the…
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