United States. Surgeon-General's Office, American Roentgen Ray Society · New York : Middleditch · leaf 22
ctors. It requires but little voltage to move a big supply ofelectrons through some materials, while with others avery great voltage will cause but little electron move-ment. The former are named conductors; the latter, in-sulators. Note carefully that the difference is one of de-gree, and that… … Fig. 1. Generator on open circuit.
