Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 430
icity upon other bodies, in which it couldnot under the same circumstances be so excited ; while on the other hand, the non-electric substances al-low the electricity to pass off. Non-electric substances, therefore, have been called conductors, and electricsubstances, non-conductors or insulators.… … Excitation of Electricity by the Mechanical Movements of Bodies. * Various names have been applied to denote the different modes of producing electrical excitation.When one body is rubbed by another, as in the case of the common frictional electrical machine, thispeculiar mode of excitation has…
Mechanical engineering · Mechanics · Engineering
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