All crimes are prosecuted by the officers of the state chosen or appointed for that purpose. Again, as in the case mentioned, the wrongful act has a double aspect. An individual who has been wronged may proceed against the wrongdoer to recover his loss; the state also has been wronged and may also proceed against him. A good illustration is a bank defaulter. The bank may proceed through a court of law to recover the money lost by him, or from those who have promised to make the bank good should he wrongfully take anything; the state may also proceed against him as a criminal for breaking a statute that forbids him from doing such a thing. Furthermore, should the bank, as often happens, agree to accept a sum from the defaulter and not trouble him further, the agreement would be no bar to an action by the state against him.

The terms law and equity are frequently used in the law books and require explanation. Formerly there was no such term as equity in the common law. It came to be used as a supplement to the law to indicate ways of doing things unknown to the law, which ought to be done. Thus if a man threatened to fill up your well because it stood, as he claimed, on his land, you had no preventive remedy at law. You could use some force to prevent him, you could not kill him, or put out his eyes, or treat him roughly. The law only gave you the right to proceed against him to recover money damages for the legal injury. A court of equity has a preventive remedy. If one threatens to fill up your well you can petition or pray the court to order that he shall refrain until there has been a legal hearing to determine whether he has any right to do so and the court will order him to desist until it has heard the case, and will enforce its order with a fine or penalty should he disobey.

The term equity contains a larger element of justice than law; and the courts often say that an act is just or equitable, meaning that an act which is just or equitable may not always be a legal act. Equity therefore is a broader term, and is in constant use in legal proceedings.

Another word frequently used in this book is action. When a person has wronged another, for example, has not paid a promissory note that is due, and the wronged party wishes to collect it through the courts, he brings an action, so called, against the wrongdoer for that purpose. Sometimes the word suit is used. Suit, or case in court, is a common expression.

Finally something should be said about courts of law. Every state has three kinds or classes of courts. First a court in which suits are brought and tried relating to small matters, the recovery of money, for example, for one or two hundred dollars or less, also for small petty criminal offenses. Next is a higher court in which suits for all larger matters are begun and tried, as well as appeals from the lower court. Lastly is a third court of review, usually called the supreme court, composed in most of the states of five, or more often, seven judges, who review the decisions of the court below whenever application is made founded on erroneous matters, the wrongful admission of, or refusal to admit, evidence and the like, and their decisions form the great body of the common law.

The federal government also has three courts corresponding somewhat to the courts established by the states. First is a court existing in every state called the district court, while some states, like New York, are divided into several districts. An appeal lies from its decision to the court of appeals consisting of three judges. There are nine of these courts, one for each circuit into which the United States is divided. Lastly appeals may be taken from their decisions and also from the decisions of the supreme courts of the states to the supreme court of the United States consisting of nine judges. An appeal does not lie in every case decided by a state court or by the federal courts of appeal; only such cases as the highest court shall decide after application, made in proper form, may be appealed and heard by that tribunal.

We have already explained the term equity. Formerly there were courts to try and decide equity cases. England still maintains such courts and a few exist in the United States; New Jersey and Delaware are two of these states. The chief official of the court is called a chancellor, the others vice chancellors. Instead of an action, as in a court of law, the preliminary proceeding is called a petition or bill, and while in substance it is similar to an action or complaint, used in a court of law, the form is quite different. The modern tendency of the law, considered in the most general way, is to fuse law and equity, and to endow law judges with equity powers. For further explanation see Legal Remedies and Equitable Remedies.

Adopted Child.—Children are sometimes adopted. By doing so the natural parents lose all personal rights and are relieved from all legal duties. The adopted parents acquire the right to the adopted child's custody and control, to his services and earnings, and they must maintain and educate him. In some states he becomes the heir of the adopted parent like a natural child, with some limitations. Who can inherit an adopted child's property is not clearly settled. He can also inherit from his natural parent and kindred as if he had not been adopted. In Massachusetts the courts hold that an adopted child will take like a natural child under a residuary clause in an adopted father's will giving all the property not otherwise devised to his child or children. See Parent and Child.

Agency.—Much of the business of our day is done by agents or persons who represent others. The most general division is into general and special agents. A general agent is one who has authority to act for his principal or person he represents in all matters, quite as the principal himself could do; or in some of his matters. Thus if a principal had a farm he might have a general agent to act as his farmer; if he owned a mill, another general agent who had charge of it. If he had two mills, he might have a general agent for each, and so on.

A special agent is authorized to do a specific thing, to sell a home, buy a horse, or effect some particular end or purpose. While this distinction is plain enough in many cases, in others the lines run so close together that it is difficult to decide whether one is a general or special agent.