Iconographic encyclopaedia of science, literature, and art (1852)
Heck, J. G. (Johann Georg), d. 1857, Baird, Spencer Fullerton, 1823-1887 · New York, R. Garrigue · leaf 317
PYRONOMICS. 105 … ations. In addition to this, b serves to concentrate the rays of heat coming from that side. The copper wire, twenty-two to twenty-four feet long, forming the galvanometer, is wound upon a metal frame. The carefully compensated magnetic needles are, as shown in fig. 37’, united together and…
Encyclopedias and dictionaries
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