. Eight lectures on the signs of life from their electrical aspect. Electrophysiology. I'.] PERIOD OF HESITATION 33 possible with very gradual compression to obtain response of the transitional type. The conversion of type I. into type III. by means of gentle massage forms a simple and almost an unfailing lecture demon- stration. Fig. 14 is the record of a case in point. § 17. A double process.—I think that any one who has wit- nessed a great number of experiments of this character, and who has carefully inspected a large number of records such as those figured above, will be forced to the con
. Eight lectures on the signs of life from their electrical aspect. Electrophysiology. I'.] PERIOD OF HESITATION 33 possible with very gradual compression to obtain response of the transitional type. The conversion of type I. into type III. by means of gentle massage forms a simple and almost an unfailing lecture demon- stration. Fig. 14 is the record of a case in point. § 17. A double process.—I think that any one who has wit- nessed a great number of experiments of this character, and who has carefully inspected a large number of records such as those figured above, will be forced to the conclusion that the normal positive response is the algebraic sum of two opposite. FlG. 16.—Frog's eyeball. False latent period or period of hesitation in this instance = 5 sees. and almost synchronous electromotive phenomena, one giving a positive current that over-compensates the other giving negative current; the first more labile than the second, so that by gentle compression it may, so to say, be wiped out, and the second be thus unmasked. A careful scrutiny of the manner in which the normal positive response begins and ends confirms this view, and at the same time offers to us a plausible explanation of what has been referred C. 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 Waller, Augustus Désiré, 1856-. New York : E. P. Dutton
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