TREPAN

( Gr. Tfujraai, I perforate.) A circular saw for perforating the skull. The term trephine is also applied to a similar but improved form of the instrument. (See the article " Trephine," in Cooper's Surgical Dictionary.) TRESPASS, in Law, strictly is any transgre ion of the law le than felony, or misprision of felony; but is generally used to signify any wrong or damage which is done by one private person to another. Trespa vi et arm is is where an act is done which is in itself an immediate injury to another's person or property; such as a ault and battery, or breaking and entering a house or close. Special trespa , or trespa on the case, where an act is not immediately injurious, but only by consequence and collaterally. Trespa is a personal action of tort, and lies for injuries of a very miscellaneous character. Trespa on the case, as a form of action, arose originally out of a power given to the Court of Chancery to frame new writs for injuries which could not be redre ed under the common forms of trespa or covenant. Trover (i u7npsit are, in their origin, different forms of trespa on the case. [s. 1269]