George Sutherland, New State Ice Company v. Liebmann…
“ A regulation valid for one kind of business may, of course, be invalid for another; since the reasonableness of every regulation is dependent upon the relevant facts. But so far as concerns the power to regulate, there is no difference, in essence, between a business called private and one called a public utility or said to be 'affected with a public interest.' Whatever the nature of the business, whatever the scope or character of the regulation applied, the source of the power invoked is the same. ”
