Upon the electrical experiments to determine the location of the bullet in the body of the late President Garfield; and upon a successful form of induction balance for the painless detection of metallic masses in the human body . f>, (silk covered.) Kesistance, 75 1 See Appendix, note 11. 17 The face of tlie coil B projected beyond the face of coil A4 mm. The balancing coils were made as nearly as possible theduplicates of A and B. The resistance of the coil of the tele-phone employed was 75 ohms. Ti)flaence of Battery Poicer. The following experiments were made Mith this apparatus(F
Upon the electrical experiments to determine the location of the bullet in the body of the late President Garfield; and upon a successful form of induction balance for the painless detection of metallic masses in the human body . f>, (silk covered.) Kesistance, 75 1 See Appendix, note 11. 17 The face of tlie coil B projected beyond the face of coil A4 mm. The balancing coils were made as nearly as possible theduplicates of A and B. The resistance of the coil of the tele-phone employed was 75 ohms. Ti)flaence of Battery Poicer. The following experiments were made Mith this apparatus(Fig. 11) on July 20th, 1881, to test the inliueiuie of batteryarrangements upon the hearing distance of a leaden l)ullet. I. Serieti of ^ toith a bichromate battery irhich had previonslt/ been inuse for a few minutes. Hearing distance of leadenbullet as observed by— A. G. Bell. S. Tainter 1 cell. 2 cells 3 cells 4 cells 5 cells 6 cells6 cells lu series iu series iu series iu series iu series iu multiple ;ir( 6 cells in t^Yo series of 3 each —6 cells iu three series of 2 o « « o « O 4» O O O O : )?(; II. ;i of experiments with a Ledanotie battery of twenty cells w
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