[Book]
Publication: The Seventh Exhibition of the Massachusetts Charitable Mechanic Association
Boston, MA, United States
p. 62, col. 1
324. George W. Otis, Lynn, Mass. Patent Insulated Lightning Conductors. These articles are intended to secure a more complete insulation of the conducting rods from the building to which they are attached than is usually attained, and are regarded by the Committee as good insulators.
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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 merits. It has a great degree of strength, arising from its form, mass, and composition, the ingredients being Flint, Feldspar, 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; and superior cheapness. The last item is of no inconsiderable importance in an article for which there is a great demand.
Bronze Medal.
