In a thousand cases the power of the State is compelled to impose restrictions on private industry. It prevents the ship owner from taking on board slaves on the west coast of Africa, and taking them over to America. It imposes regulations as to the building of steamers and the rules of navigation at sea, in order that passengers and sailors may not be sacrificed to the avarice and caprice of the captains. [...] Everywhere does the State consider it to be its duty to guard the public against danger and loss, as in the sale of the necessaries of life, so also in the sale of medicines, etc.