Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 478
, as every electrician knows, to dothis with the ordinary apphances is tiresome, and the resultis liable to be inaccurate. The extreme delicacy of the action of the galvanometerrenders it difficult to apply to it any device capable of record-ing the movements of the needle without interfering… … arranged as in an astatic galvanometer. The helixes arewound with rather coarse wire (No. 22). The needle is astatic, 456 EXPERIMENTAL SCIENCE. the inner member swinging in the central opening in thehehxes in the usual way, the outer member being locatedbehind the helixes. The arbor supporting the…
Physics · Lantern projection · Electric apparatus and appliances
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-156-63.webp)
