–476–
-476dence, but it is not to be given prima facie effect in indicating whether the person was intoxicated; (3) evidence that there was, at such time, fifteen-hundredths of one per cent or more by weight of alcohol in his blood, shall be admitted as prima facie evidence that the person was intoxicated; and (4) per cent by weight of alcohol in the blood shall be based upon milligrams of alcohol per one hundred milligrams of blood. § 1716. Effect of evidence of chemical tests This subchapter does not limit the introduction of any other competent evidence bearing on the question of whether the person was mtoxicated. C H A P T E R 87—NAVIGATION See.
1751. Masking, altering, removing, or exhibiting lights or signals. 1752. Obstructing navigable waters. § 1751. Masking, altering, removing, or exhibiting lights or
signals Whoever, with intent to bring a vessel into danger: (1) unlawfully masks, alters, or removes a light or signal; or (2) willfully exhibits a light or signal— shall be imprisoned in the penitentiary not more than 20 years. § 1752. Obstructing navigable w a t e r s Whoever unlawfully obstructs the navigation of a navigable stream or waters, shall be fined not more than $100 or imprisoned in jail not more than 30 days, or both. C H A P T E R 89—NUISANCES See. 1781. Public nuisance defined; punishment for committing or maintaining. § 1781. Public nuisance defined; punishment for committing or maintaining (a) Anything is a public nuisance which: f l W s injurious to health; (2) is indecent or offensive to the senses; (3) is an obstruction to the free use of property, so as to interfere with the comfortable enjoyment of life or property by an entire community or neighborhood, or by a considerable number of persons; or (4) unlawfully obstructs the free passage or use, in the customary manner, of a navigable lake or river, bay, stream, canal, or basin, or a public square, street^ or highway. (b) An act which affects an entire community or neighborhood, or a considerable number of persons, as specifiea in subsection (a) of this section, is not less a nuisance because the extent of the annoyance or damage inflicted upon individuals is unequal. (c) Whoever: (1) commits or maintains a public nuisance, the punishment for which is not otherwise prescribed by law; or (2) willfully omits to perform a legal duty relating to the removal of a public nuisance— shall be fined not more than $100 or imprisoned in jail not more than 30 days, or both.
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