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There were other colors however and these can be quite rare and valuable.
The largest trash dump identified during the Overton Power project was a site that is visible on an aerial photograph which we will call the “Weiser Wash Dump” (Site 26CK9509) (Figure 2).
A total of 24 discreet concentrations were identified at the Weiser Wash Dump.
This increased the need for the glass insulator and more companies sprang up in response to the need.
From 1920 to 1950 there was a peak in the manufacture of glass insulators.
As time went on the insulators became larger and reflected the growth of the telephone and electricity.
In 1936 President Roosevelt and Congress passed the Rural Electrification Act which provided funding for electricity and telephone wiring to be run to farms and homes in outlying areas.Because of this you may see occasionally see an insulator in opalescent glass, Vaseline glass, or other unusual color (or even mixture of colors).These are very collectible because of their rarity.Lessons Learned From Historic Artifacts By Annette J. While working on the Overton Power project, located approximately 60 miles northeast of Las Vegas, Knight & Leavitt Associates, Inc. *Note that at the bottom of this page, there is a link to a file of this document that is available for downloaded.Other manufacturers recycled old bottles and other glass items which resulted in swirls of color, bubbles, and other interesting effects in the insulator.