Mahlon Pitney, Mackay Telegraph Cable Company v…
“ That a reasonable tax upon the maintenance of poles and wires erected and maintained by a telegraph company within the limits of a city pursuant to authority granted by its ordinances is not an unwarranted burden upon interstate or foreign commerce or upon the functions of the company as an agency of the government, and does not infringe rights conferred by the Act of Congress, is so thoroughly settled by previous decisions of this court that no further discussion is called for. ”
