Eight lectures on the signs Eight lectures on the signs of life from their electrical aspect eightlectureson00wall Year: 1903 90 THE SIGNS OF LIFE [lect. with a closure time of sec. The strongest negative polarisation occurred after a current of i Daniel passed for 10 minutes; the strongest positive polarisation after a current of 20 Groves passed for sec.; in the latter case the appeared to be rather less than that of a muscle-current. Fig. 39.—T is the time of closure, A the density of the polarising current, + S the strength of the secondary electromotive effect, so that
Eight lectures on the signs Eight lectures on the signs of life from their electrical aspect eightlectureson00wall Year: 1903 90 THE SIGNS OF LIFE [lect. with a closure time of sec. The strongest negative polarisation occurred after a current of i Daniel passed for 10 minutes; the strongest positive polarisation after a current of 20 Groves passed for sec.; in the latter case the appeared to be rather less than that of a muscle-current. Fig. 39.—T is the time of closure, A the density of the polarising current, + S the strength of the secondary electromotive effect, so that the plane viewed in perspective is the T A Plane. The individual ordinates S are not represented, but only the curves joining the ordinates belonging to given current density and given time (from du Bois-Reymond, Archiv, 1884, p. 15). § 57. Two criticisms.—Hermann—du Bois' former pupil and untiring critic—pounced at once—-showing and saying in a paper of upwards of sixty closely printed pages of Pfliige7''s Archiv (vol. xxxiii.), that du Bois' positive polarisation current was in reality a post-anodic action-current. Hering also inter- vened, and said the same thing in two successive papers of the Wiener Sitzungsberichte (12th and 13th communications, 1883). Both du Bois' critics confined themselves to a discussion of the interpretation to be placed upon du Bois' phenomenon, and proved that it was of post-anodic nature, and that the designa- tion of positive polarisation was a very unhappy one. But the critics did not demur to or subtract from the fact itself, nor
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