. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. ACH CL /0-e ACH CL 10-'^ ACH CL 10-^ Fig. 209. Effect of three concentrations of acetylcholine on the heart of the lobster. From ;"'. 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 Prosser, C. Ladd (Clifford Ladd), 1907-; Bishop, David W. Philadelphia, Saunders

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