A common carrier of passengers is bound to receive and carry alike all persons applying and willing to pay for their transportation. The fare required of the passenger must be reasonable, and in many states it is regulated by statute. The carrier is bound to have means and appliances suitable to the transportation, and to use all reasonable precautions for the safety of passengers. He can prescribe reasonable rules as to showing tickets, etc. The carrier is not an insurer of the lives and safety of the passengers, but he is held to a high degree of care, and will be liable for even slight negligence. While the carrier does not warrant the safety of the passengers, he is held to the highest degree of care practicable under the circumstances. In most of the states the carrier is not permitted to limit his liability for injury to the passenger. It is considered contrary to public policy to exempt the carrier from liability for even slight negligence when the lives and safety of human beings are concerned. The passenger who pays his fare to the carrier is entitled to have certain baggage taken without charge, and for this baggage the carrier is liable as for the carriage of freight. Baggage in this sense includes such articles of personal necessity, convenience, and comfort as travelers under the circumstances are wont to take on their journeys. It does not include merchandise or a stock of goods used in the traveler's business.