The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 253
ncertain limits. Galvanometers thus constructed are termedinultijpliers^ since they serve to increase the power of the elec-tric current, and indicate its flow even in the smallest quan-ities. Design of the Galvanometer, Fig. 197 ? Effects of the galvanic flow throughonly the upper side of th^ wire… … Fig. 198 shows a common form of the Galvanometer forindicating the direction and quantityof the galvanic flow. A wire is coiledseveral times about a magnetic needle,with its two ends terminating beneaththe screw-cups. The needle is madeto stand in a line with the coil whenacted upon by the earths…
Physics
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