Sec. 978-7. A miner or loader of the contents of a mine car, containing a greater percentage of slate, sulphur, rock, dirt or other impurity, than that ascertained and determined by said industrial commission, as hereinbefore provided, shall be guilty of a misdemeanor and upon conviction shall be punished as follows: for the first offense within a period of three days he shall be fined fifty cents; for a second offense within such period of three days he shall be fined one dollar; and for the third offense within such period of three days he shall be fined not less than two dollars nor more than four dollars. Provided, that nothing contained in this section shall affect the right of a miner or loader and his employer to agree upon deductions by the system known as docking, on account of such slate, sulphur, rock, dirt or other impurity. =JURISDICTION.= The following are the sections of the General Code referred to in various sections of the mining law, and under which prosecutions will be made. =JURISDICTION.= Sec. 13423. Justices of the peace, police judges and mayors of cities and villages shall have jurisdiction, within their respective counties, in all cases of violation of any law relating to: 1. Adulteration or deception in the sale of dairy products and other food, drink, drugs and medicines. 2. The prevention of cruelty to animals and children. 3. The abandonment, non-support or ill treatment of a child by its parent. 4. The abandonment or ill treatment of a child under sixteen years of age by its guardian. 5. The employment of a child under fourteen years of age in public exhibitions or vocations injurious to health, life or morals, or which cause or permit it to suffer unnecessary physical or mental pain. 6. The regulation, restriction or prohibition of the employment of minors. 7. The torturing, unlawfully punishing, ill treating, or depriving anyone of necessary food, clothing or shelter. * * * * * 15. The prevention of short weighing and measuring and all violations of the weights and measures laws. (1080 O.L., 41.) =JUSTICES, POLICE JUDGES AND MAYORS.= Sec. 13432. [=When imprisonment is a part of the punishment a jury shall be impaneled.=] In prosecutions before a justice, police judge or mayor, when imprisonment is a part of the punishment if a trial by jury is not waived the magistrate, not less than three days nor more than five days before the time fixed for trial, shall certify to the clerk of the court of common pleas of the county that such prosecution is pending before him. (R.S. Sec. 3718a.)