Ternant, A. L. (Alcide Ludovic), 1832-1884 · London ; New York : G. Routledge and Sons · leaf 140
THE TELEGRAPH. 122 wherever the placing of a bell insulator presented any diffi¬ culties are no longer employed. They were easily fitted, but … their insulation was very imperfect in damp weather. They have been replaced by the ordinary bell insulators, which are fixed on posts away from buildings, or placed beneath viaducts, or on brackets attached to the posts, or cramped into walls. Fig. 60. In England supports are often so attached to…
Telegraph
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
