An international system of electro-therapeutics : for students, general practitioners, and specialists . wound in a direction opposite to that of the lower coil. Theterminals of these wires are attached to four binding-screws on the vul-canite disk. The coils are supported by brass uprights, covered by aglass shade, brass bound, which rests upon the vulcanite base, the wholebeing leveled by three screws. From the centre of the brass disk cover-ing this shade rises a brass rod which carries a movable, curved magnet,slightly magnetized, by which it is possible, by moving it up and down,not only
An international system of electro-therapeutics : for students, general practitioners, and specialists . wound in a direction opposite to that of the lower coil. Theterminals of these wires are attached to four binding-screws on the vul-canite disk. The coils are supported by brass uprights, covered by aglass shade, brass bound, which rests upon the vulcanite base, the wholebeing leveled by three screws. From the centre of the brass disk cover-ing this shade rises a brass rod which carries a movable, curved magnet,slightly magnetized, by which it is possible, by moving it up and down,not only to neutralize the earths magnetism, but to create an artificialmeridian in any direction. For observing the deflections of the needles, alamp and scale arrangement, such as shown in Figs. 2 and 3, is used, whichis placed about three feet from the galvanometer. A small slit in the framebeneath the scale permits a narrow beam of light to pass to the mirror andby it is reflected to the scale. The image is brought to the zero-point byshifting the position of the magnet by fine adjusting-screws. When the. Fig
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectuterus, bookyear1894
