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Kennedy had Chase and another detective whom he frequently employed on routine matters at work over the clues developed by his use of the sphygmograph. Elaine, anxious for news, had dropped in on us at the laboratory just as Kennedy was hastily opening his mail. Craig came to a large letter with an official look, slit open the envelope, and unfolded the letter.
This important and growing department will be represented in the ideal gymnasium of the future First, by courses, if not by a chair, devoted to the apparatus of measurements of human proportions and symmetry, with a kinesological cabinet where young men are instructed in the elements of auscultation, the use of calipers, the sphygmograph, spirometer, plethysmograph, kinesometer to plot graphic curves, compute average errors, and tables of percentile grades and in statistical methods, etc.
If he knew, he must have been a splendid actor, one of those whom only the minute blood-pressure test of the sphygmograph could induce to give up a secret, and then only in spite of himself. "It is wonderful," I agreed. "Are you ready?" We left the apartment and walked along in the bracing morning air toward the campus and the Chemistry Building.
Johnson holds the opinion that a pen in the hand of a writer serves, in a modified degree, the same end as the needle in the first-named form of the sphygmograph and that in such a person's handwriting one can see by projecting the letters, greatly magnified, on a screen, the scarcely perceptible turns and quivers made in the lines by the spontaneous action of that person's peculiar pulsation.
He completed his test in silence and excused himself, although as we went back to the kitchen I was burning with curiosity. "What was it?" I asked. "What did you discover?" "That," he replied, "was a sphygmomanometer, something like the sphygmograph which we used once in another case. Normal blood pressure is 125 millimetres. Mr. Pitts shows a high pressure, very high.
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