International Library of Technology · Scranton, International Textbook Co. · leaf 120
ired. Tests re-cently made have shown thatwhen newly put up, the insula-tion resistance of porcelain insu-lators io from 4 to 8 times betterthan glass, but that along rail-roads and in cities smoke forms athin film upon each material, sothat at the end of a few monthstheir insulating properties are… … Flu. 3. 15 ELECTRIC TRANSMISSION. advantage over glass in that it is not so brittle, and, there-fore, less likely to break when subjected to mechanicalshocks. Porcelain does not condense and retain on its sur-face a thin film of moisture so readily as glass, i. e., it isless hygroscopic. On the…
Electrical engineering
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.], 1902, leaf 120](https://img.insideoutlibrary.com/img/1024/ia-electricengineer03inte-120-54.webp)
![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher04nati-12-4.webp)
