. Eight lectures on the signs of life from their electrical aspect. Electrophysiology. 112 THE SIGNS OF LIFE [lecT. probably think, as I do, that an organ with two effective epitheHal layers, even if one of these layers is greatly more effective than the other, is not the most suitable object to afford contrary electrical effects significant of contrary chemical changes. It would have been preferable if Biedermann had based his case upon contrary electrical effects of a single mucous surface. And I think that when you have reflected upon the conditions of the problem, you will realise as a cle
. Eight lectures on the signs of life from their electrical aspect. Electrophysiology. 112 THE SIGNS OF LIFE [lecT. probably think, as I do, that an organ with two effective epitheHal layers, even if one of these layers is greatly more effective than the other, is not the most suitable object to afford contrary electrical effects significant of contrary chemical changes. It would have been preferable if Biedermann had based his case upon contrary electrical effects of a single mucous surface. And I think that when you have reflected upon the conditions of the problem, you will realise as a clear economy of labour and an escape from much perplexity, to methodically follow the ABC plan for the separate examina- tion of the single points A and B of a simple mucous surface. I have done so to some extent, but by no means sufficiently. As far as I have gone, I find that the electrical response of a mucous surface may be ingoing or outgoing, but that it is usually the former. Here, ^ is the record of a series of ingoing responses of a frog's stomach:—. 1/iAW—ir l§ Eccc. &i BLaze ingoing. SeroscL Fig. 47.—Frog. Stomach. Two series of ingoing responses to ingoing single break induction shocks at one minute intervals. Interval of one hour between the first and second series. I 69. A warning.—Let me here put you on your guard against a fallacy to which I was myself hardly alive in the first comparisons of anode versus kathode, and surface against surface. It is important that the area of contact between surface and electrode shall, as far as possible, be equal on both sides and not accidentally extended by excess of clay or by fluid used to moisten the electrodes. As a matter of fact, it. 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, 1856-1922. New York : E. P.
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