Chapter 236, Laws of Kansas, 1931, requires private motor carriers for hire in interstate commerce to secure a license from the public service commission, to secure a liability insurance policy, to keep daily records as prescribed by the commission, to pay a tax of five-tenths of a mill per gross ton for highway maintenance, and to be subjected to the supervision of the commission. Various regulations for making the highways safer are included. Plaintiff operated as a private motor carrier for hire in interstate commerce and sued to enjoin the enforcement of the act which it claimed was unconstitutional, for the reason, among others, that it interfered with interstate commerce. Held, the statute is constitutional, and the plaintiff's bill was dismissed. Continental Baking Company v. Woodring, 286 U.S. 352, 52 Sup. Ct. 595 (1932).