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 . s A B (Fig. 21) arearranged as shown, in arecess turned out in asingle l)loclv of wood coils are tempo-rarily connected with atelephone, hattery andrheotome in the mannershown in Fig. 1, so thatthey may he adjusted hyhand to f(^rm a l) they have heenarranged in tlieir posi-tion of silence the hol-low in thehlock of woodC (Fig. 21) is filled withmelted
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 . s A B (Fig. 21) arearranged as shown, in arecess turned out in asingle l)loclv of wood coils are tempo-rarily connected with atelephone, hattery andrheotome in the mannershown in Fig. 1, so thatthey may he adjusted hyhand to f(^rm a l) they have heenarranged in tlieir posi-tion of silence the hol-low in thehlock of woodC (Fig. 21) is filled withmelted paraffine. Upon cooling, the two coils are found im-movahly fixed in one solid cake of paraffine. As a matter of practice it is found impossil)le to fix the coilsin this way exactly in their position of silence ; hut hy meansof two other very small coils, D E, (Fig. 22,) of insignificantresistance, forming a sort of fine adjustment external to theexplorer, a perfect halance is easily ohtained. In tliis instru-ment the swaying of the coils A B produces no effect uponthe halance. The completed arrangement is shown in plan in Fig. 22,and the explorer and l)alancing coils are shown separately inperspective inFigs. 23 and
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Keywords: ., bookauthoryapamphl, bookcentury1800, bookdecade1880, bookyear1882
