SEC. 10. 10. Whenever there shall be found upon the person of anyone who is guilty of a breach of the peace, or of conduct calculated to provoke a breach of the peace, any slung shot, colt, or knuckles of lead, brass or other metal, or, when upon trial, evidence shall be adduced proving that such weapons were in the possession or on the person of anyone while in the act of commission of the acts aforesaid, such person shall upon conviction be fined not less than twenty-five dollars nor more than three hundred dollars.