But it is recognized that punishment for the abuse of the liberty accorded to the press is essential to the protection of the public, and that the common law rules that subject the libeler to responsibility for the public offense, as well as for the private injury, are not abolished by the protection extended in our constitutions. The law of criminal libel rests upon that secure foundation. There is also the conceded authority of courts to punish for contempt when publications directly tend to prevent the proper discharge of judicial functions.