vement of the magnet frame The applications of these brakes have given ex- combined. and to determine the zero position, an upright carry- cellent results, and it is to be'anticipated that all those "The wall was of a dirty, almost grayish-white. Had ing two stops and an indicating pointer is… … quence. it." The important point in Fig. 1-SMALL MODEL MAGNETIC BRAKE. Sir J. Herschel, in his mounting is that the axis "Outlines of Astronomy," de- of oscillation of the electro- scribes the phenomenon as magnet shall coincide very follows: "Under favorable exactly with the prolonga-…
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