OBREPTION, civil law. Surprise. Dig. 3,5,8,1. Vide Surprise.

OBSCENITY, crim. law. Such indecency as is calculated to promote the violation of the law, and the general corruption of morals.

2. The exhibition of an obscene picture is an indictable offence at common law, although not charged to have been exhibited in public, if it be averred that the picture, was exhibited to sundry persons for money. 2 Serg. & Rawle, 91.

TO OBSERVE, civil law. To perform that which has been prescribed by some law or usage. Dig., 1, 3, 32.

OBSOLETE. This term is applied to those laws which have lost their efficacy, without being repealed,

2. A positive statute, unrepealed, can never be repealed by non-user alone. 4 Yeates, Rep. 181; Id. 215; 1 Browne's Rep. Appx. 28; 13 Serg. & Rawle, 447. The disuse of a law is at most only presumptive evidence that society has consented to such a repeal; however this presumption may operate on an unwritten law, it cannot in general act upon one which remains as a legislative act on the statute book, because no presumption can set aside a certainty. A written law may indeed become obsolete when the object to which it was intended to apply, or the occasion for which it was enacted, no longer exists. 1 P. A. Browne's R. App. 28. "It must be a very strong case," says Chief Justice Tilghman, "to justify the court in deciding, that an act standing on the statute book, unrepealed, is obsolete and invalid. I will not say that such case may not exist-where there has been a non-user for a great number of years-where, from a change of times and manners, an ancient sleeping statute would do great mischief, if suddenly brought into action-where a long, practice inconsistent with it has prevailed, and, specially, where from other and latter statutes it might be inferred that in the apprehension of the legislature, the old one was not in force." 13 Serg. & Rawle, 452; Rutherf. Inst. B. 2, c. 6, s. 19; Merl. Repert. mot Desuetude.

OBSTRUCTING PROCESS. crim. law. The act by which one or more persons at- tempt to prevent, or do prevent, the execution of lawful process.

2. The officer must be prevented by actual violence, or by threatened violence, accompanied by the exercise of force, or by those having capacity to employ it, by which the officer is prevented from executing his writ; the officer is not required, to expose his person by a personal conflict with the offender. 2 Wash. C. C. R. 169. See 3 Wash. C. C. R. 335.

3. This is in offence against public justice of a very high and presumptuous nature; and more particularly so where the obstruction is of an arrest upon criminal process: a person opposing an arrest upon criminal process becomes thereby particeps criminis; that is, an accessary in felony, and a principal in high treason. 4 Bl. Com. 128; 2 Hawk. c. 17, s. 1; l. Russ. on Cr. 360: vide Ing. Dig. 159; 2 Gallis. Rep. 15; 2 Chit. Criminal Law, 145, note a.