1872 Knights Mechanical Dictionary Insulators

By Rob Lloyd; posted March 27, 2014

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1872 Knight's "American Mechanical Dictionary" entry under "Insulators". They show some nice hook examples (though what they call a "Varley" looks a lot like a "Brooks") but it would have been nice to see other types as well. On the following page are just more examples of what substances constitute an insulator and a list of these can be found in any dictionary worthy of the deffinition.