SEC. 6. It shall be unlawful for any person or persons, at any time, to place, or use, in any of the streams or rivers of this State, any drugs, charms, or powder, or to use any giant blasting or gun powder, or other explosive material, for the purpose of catching, killing or destroying fish; and any person violating the provision of this section, shall be fined twenty dollars for the first offence, double that sum for the second and treble that sum for the each succeeding offense, to which may be added imprisonment for any time not exceeding ninety days.