David Josiah Brewer,
Gulf Railway Company v. Ellis…
“ It is apparent that the mere fact of classification is not sufficient to relieve a statute from the reach of the equality clause of the fourteenth amendment, and that in all cases it must appear not only that a classification has been made, but also that it is one based upon some reasonable ground,-some difference which bears a just and proper relation to the attempted classification,- and is not a mere arbitrary selection. ”
