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Historical Sketch of the Electric Telegraph
http://quod.lib.umich.edu/cgi/t/text/text-idx?type=simple&c=moa&sid=611f825d47fd892f&q1=telegraph&rgn=title&firstpubl1=1845&firstpubl2=1925&view=toc&cc=moa&idno=AGX3786.0001.001&start=1&size=25