. Contributions to practical physiology and pharmacology. Physiology; Pharmacology. 25 Special Cardiograph long to render adjustment easy. Near their free extremities they are bent outward at an angle to provide a rest for the nerve. Electrical connection is made by inserting wires into the top ends of the holders. In the experiments on the frog as just described, the electrodes are supported on an L rod, which in turn is clamped to the stand support rod sleeve below the clamp wdiich holds the frog board. Thus it is possible to adjust the electrodes quickly in any position desired, and since t
. Contributions to practical physiology and pharmacology. Physiology; Pharmacology. 25 Special Cardiograph long to render adjustment easy. Near their free extremities they are bent outward at an angle to provide a rest for the nerve. Electrical connection is made by inserting wires into the top ends of the holders. In the experiments on the frog as just described, the electrodes are supported on an L rod, which in turn is clamped to the stand support rod sleeve below the clamp wdiich holds the frog board. Thus it is possible to adjust the electrodes quickly in any position desired, and since they are rigidly supported they maintain a very constant adjust- ment to the Fig. 20. Adjustable electrodes. B. Adjustable electrodes with electrical contact surfaces in posterior end of support rod. An insulating collar similar to the one shown in Fig. 2, G, is provided. This electrode is convenient for use on frogs and turtles, and in certain experiments on mammals. It may be used for stimulating muscle directly, as in the case of the turtle's heart, by lightly placing the lower surfaces of the bent ends against the muscle, in which posi- tion it may be held by a clamp attached to a support. SpEciaIv Cardiograph A special form of heart lever has been designed for studying the heart by the suspension or the pad and rest method. Fig. 21. It is employed precisely as has been described for the regular lever and presents no points of superiority other than those conferred by the fact that being designed especially, it is somewhat smaller, particularly due to cutting down of the frame, and to the absence of frame accessories. The movable point is not attached at the fulcrum, but one or two centi-. 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 Guthrie, Charles Claude, b. 1880. [Baltimore, Press of Kohn a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysiology, bookyear1
