Eight lectures on the signs Eight lectures on the signs of life from their electrical aspect eightlectureson00wall Year: 1903 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 rest. 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 firm
Eight lectures on the signs Eight lectures on the signs of life from their electrical aspect eightlectureson00wall Year: 1903 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 rest. 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 ' pulled.' Now I contract the muscles of my left forearm, and every- thing is reversed. You have witnessed du ' Bois-Reymond's
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