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I never set out to write a book reinterpreting the financial, social, and political relationship between the American railroad and telegraph industries in the nineteenth century. I have always had an interest in the history of communication and, to a lesser...

Guest post by Richard C. Carpenter. When we drive along the interstate highway system, we measure our progress by mile markers, which are placed just off the right shoulder of the roadway. Interstate standards require that they be measured from zero at the...