Horace Gray, Schollenberger v. Pennsylvania…
“ As has been said by this court, speaking by the present Chief Justice: 'The power of the state to impose restraints and burdens upon persons and property in conservation and promotion of the public health, good order, and prosperity, is a power originally and always belonging to the states, not surrendered by them to the general government, nor directly restrained by the constitution of the United States, and essentially exclusive. ”
