_Death of Mother by Abortion._—So also where in consequence of producing an abortion the death of the mother occurs, the person producing the abortion is guilty of murder at common law. 4 Blackstone’s Com., 201; 1 Bishop’s Crim. Law, 328. In some of the States, however, these offences are declared to be only manslaughter. Further consideration of the subject of abortion will be had under that title in another part of this work. _Statutes Generally Except Abortions Necessary to Save Life._—It should be noted here, however, that nearly all the statutes which define and punish the crime of abortion, or the crime of manslaughter or murder committed in consequence of abortion, declare that when it is necessary to produce a miscarriage in order to save life, the act of doing so is excepted from the effect of the statute. =Negligent Malpractice.=—Under the third subdivision of the definition, viz., when by reason of the negligent acts on the part of the physician or surgeon the patient suffers death or unnecessary injury, may be placed the most numerous cases of malpractice, according to the generally accepted meaning of the term. _Criminal Liability for Negligent Malpractice._—It is manifest that not every degree of negligence which causes death or injury ought to render the physician or surgeon liable to indictment and punishment for a crime. The general theory of the criminal law is based upon the doctrine that in order to constitute a crime there must be either an intent to do the wrong, or such a degree of negligence in the performance of a given act as to supply the place of the intent to do wrong, and require punishment for the protection of society, upon the ground that the carelessness of the defendant is so great as to make it necessary and proper to punish him, in order to deter others from following his example.