uHv bound in Ki,., Vloth. Xo VleS.er SAX FRAXCLSCO, CAL. bP „n Wm^'' ",' ''''""■^' ''°'"''''-"'' "''"'T' '^ c"'^>' "•■ Lr««TX.N-o Flashes: and as all the n.atteHn h can be understood by persons not conuedcd with telegraphy, it is hoi-ed that the book will have a lar-e sale amon^^ outsiders.… … The advantages of this Insulator art* : 1st. It exceeds ordinary Insulators a thou sand /aid h^ actuA measurement in its insulating properties. 2d. It has an easy fastening for any size of wire without bending or straining the latter, and cannot be^ displaced ,ot broken by any strain which the wire…
Telegraph -- Periodicals
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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