[Trade Journal]
Publication: American Electrician
New York, NY, United States
vol. 9, no. 11, p. 460, col. 3
Porcelain Insulators. C. J. Knowles, 7 Arch Street, Boston, in a lately issued pamphlet describes and illustrates the different types of "Imperial" porcelain insulators. Considerable information is given concerning the properties of porcelain that make that material so superior for insulating purposes.
