[Trade Journal]
Publication: The Sixth Exhibition of the Massachusetts Charitable Mechanic Association
Boston, MA, United States
vol. 1, p. 62
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12. E. B. ELLIOTT, Boston. White Flint Telegraphic Insulators. In the opinion of the Committee, who predicate their judgment partly upon examination, and partly upon reliable testimony, this article has the following merit. It has a great degree of strength, arising from its form, mass, and composition, the ingredients being Flint, Feld-spar, and Quartz, principally Flint; insulating properties equal to those of the best glass, and superior to those of some kinds of glass; corrugations in the interior, to secure an insulating ring in case of deposition of moisture; imperviousness to water, probable security against the ill effects of exposure to the weather; and superior cheapness. The last item is of no inconsiderable importance in an article for which there is a great demand. Bronze Medal.
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