Morrison Waite,
State of Tennessee v. Whitworth…
“ A tax upon the railroad, therefore, after its completion, is necessarily a tax upon the capital, because, practically, the capital and that into which it has been converted are the same. The railroad of the corporation may be worth more than its capital, but all its capital is in its railroad. Such being the case, the taxation of both railroad and capital would be, so far as the corporation is concerned, double taxation. ”
