[Trade Journal]
Publication: Electrical Age
New York, NY, United States
vol. 35, no. 5, p. 390, col. 1
"Supplement No. 1" to "The Insulator Book" brought out by the Locke Insulator Manufacturing Company, of Victor, N. Y., has recently been issued. In this publication the matter contained in "The Insulator Book" is brought strictly up to date, and those possessing the one should make sure to obtain the other.