. Carnegie Institution of Washington publication. Fui. 22.—Une corner of room C, the main psychological laboratory. The fiKure shows the arrangoment of a portion of the apparatus used in taking electrocardiograms under condi- tions of short periods of muscular exertion. The string galvanometer and arc lamp are at the left and not shown in the picture. The subject is connected to the galvanometer by electrode loads, E. A standard- izing resistance arrangement R and a protection resistance R' make possible control of the string's deflec- tions. Electrical condensers C in series with the subject
. Carnegie Institution of Washington publication. Fui. 22.—Une corner of room C, the main psychological laboratory. The fiKure shows the arrangoment of a portion of the apparatus used in taking electrocardiograms under condi- tions of short periods of muscular exertion. The string galvanometer and arc lamp are at the left and not shown in the picture. The subject is connected to the galvanometer by electrode loads, E. A standard- izing resistance arrangement R and a protection resistance R' make possible control of the string's deflec- tions. Electrical condensers C in series with the subject and the galvanometer string minimize its dis- turbance at the moments of physical activity. The photographic camera P is driven bv a motor on the other side of the wall at M. The action of the camera is very quiet, its speed is controlled at S, and the paper or film after exposure is deposited in the large dark box D. The bar B, upon which the subject exercises, is directly above him and within easy Fig. 23.—The subject in position during the moments of physical exertion. Previous to exertion the subject reclines comfortably in a steamer chair. At a given signal he reaches, grasps the bar above him, and raises himself, thrusting his feet forward to keep all his weight free from other support, and maintains the position shown in the figure until the signal "down," at which he relaxes into the chair. The electrocardiographic record is continuous through rest, exertion, and rest. The experimen- ter occupies a position at the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1910, bookyear1919
