Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 168
absorbing agiven amount of energy, is much smaller than one madeof coils of wirestretched betweenan iron supportingframe-work. 164. Resistanceof Connections.—When two surfacesare pressed lightlytogether the resist-ance of the contactis much greaterthan if the surfacesof contact are firmlypressed… … Fig. 125.—Laboratory Type of Rheostat.
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
