Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 1099
ded at the bottom ends with soft-iron keepersattracted by two electromagnets, E E, for west and north, and by twoother electromagnets lower down for south and east. These four electro-magnets, as well as all the others on the apparatus, are worked by a singlebattery of twenty-four cells. The… … which greater steadiness is obtained than with a single plate. In the rod ofthe vane is a small brass plate, o ; this part is in the centre of four metal 3^ I074 Meteorology [1015-
Physics
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