. Eight lectures on the signs of life from their electrical aspect. Electrophysiology. Vll.] DU BOIS' EXPERIMENT 121 left hand connected with the S terminal, and my right hand with the N. The forefinger of each hand dips in salt solution, there is little or no difference of potential between my two hands, and the spot is at Fig. 52.—Du Bois-Reymond's "Willkiirversuch," to demonstrate a negative variation during voluntary muscular contraction. The current is ascending in the active arm. (From du Bois-Reymond's Thierisclie Elektrtcitat). I now firmly contract the muscles of my r
. Eight lectures on the signs of life from their electrical aspect. Electrophysiology. Vll.] DU BOIS' EXPERIMENT 121 left hand connected with the S terminal, and my right hand with the N. The forefinger of each hand dips in salt solution, there is little or no difference of potential between my two hands, and the spot is at Fig. 52.—Du Bois-Reymond's "Willkiirversuch," to demonstrate a negative variation during voluntary muscular contraction. The current is ascending in the active arm. (From du Bois-Reymond's Thierisclie Elektrtcitat). I now firmly contract the muscles of my right forearm ; the spot moves to my right (your left), or clockwise in the circuit, or in my body from right to left. The spot is " ; Now I contract the muscles of my left forearm, and every- thing is reversed. You have witnessed du ' Bois-Reymond's. 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. Dutton
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