[Trade Journal]
Publication: Bell Laboratories Record
Murray Hill, NJ, United States
vol. 21, no. 10, p. 346, col. 1
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To study the aging effect of smoke, fog, dust and rain on the surface
of insulators designed for open-wire lines, samples are mounted on
test cross-arms in representative locations in coastal, industrial and
rural areas. Periodically the insulators are returned to the Laboratories
for comprehensive tests.
