from
Bouvier's Law Dictionary, Revised 6th Ed (1856)
JUSTICES OF THE PEACE. Public officers invested with judicial powers for the
purpose of preventing breaches of the peace, and bringing to punishment
those who have violated the law.
2. These officers, under the Constitution of the United States and some
of the states, are appointed by the executive in others, they are elected by
the people, and commissioned by the executive. In some states they hold
their office during good behaviour, in others for a limited period.
3. At common law, justices of the peace have a double power in relation
to the arrest of wrong doers; when a felony or breach of the peace has been
committed in their presence, they may personally arrest the offender, or
command others to do so; and in order to prevent the riotous consequences of
a tumultuous assembly, they may command others to arrest affrayers, when the
affray has been committed in their presence. If a magistrate be not present
when a crime is committed, before he can take a step to arrest the offender,
an oath or affirmation must be made by some person cognizant of the fact
that the offence has been committed, and that the person charged is the
offender, or there is probable cause to believe that he has committed the
offence.
4. The Constitution of the United States directs, that "no warrants
shall issue, but upon probable cause, supported by oath or affirmation."
Amend. IV. After his arrest, the person charged is brought before the
justice of the peace, and after bearing he is discharged, held to bail to
answer to the complaint, or, for want of bail, committed to prison.
5. In some, perhaps all the United States, justices of the peace have
jurisdiction in civil cases, given to them by local regulations. In
Pennsylvania, their jurisdiction in cases of contracts, express or implied,
extends to one hundred dollars. Vide, generally, Burn's Justice; Graydon's
Justice Baches Manual of a Justice of the Peace Com. Dig. h.t.; 15 Vin. Ab.
3; Bac. Ab. h.t.; 2 Sell. Pr. 70; 2 Phil. Ev. 239; Chit. Pr. h.t.; Amer.
Dig. h.t.