Insulator collector's resource with information on glass and porcelain insulators, a show calendar, glossary, tips and photos of rare items. http://www.insulators.com/
This site provides detailed information about the National Insulator Association. Photographs related to collecting glass and porcelain insulators and significant historical data are also available. http://www.nia.org/
This page is part of an historic reference site dealing, in part, with Canadian glass works. Pictured here is a lightning rod insulator bearing the "Hickock's Patent 1859", USA. http://www.civilization.ca/hist/verre/veind01e.html
A photograph gallery where insulator collector's can post their insulator pictures by sending them to The Insulator Webmaster - Bill Meier. http://www.insulators.com/pictures/
Magazine dedicated to the collectors of historic glass and porcelain insulators used by telegraph, telephone and electric power utilities. Includes value finder and subscription information. http://www.crownjewelsofthewire.com/
Here is a commercial advertising a high-end, industry specific journal that serves the commercial electrical market as a source of information on international developments in power transmission and distribution. http://www.inmr.com/
Assortment of insulator, telegraph, telegram, mining and vintage document information and graphics. Also, insulator identification drawings and a listing of telegraph company names, and scanned telegrams. Extensive want list and trade item list. http://members.aol.com/cd102