(c) under which regulations may be made for prescribing the duties of owners, agents and managers of mines and of persons acting under them; (g) for determining the circumstances 'in which and the conditions subject to which it shall be lawful for more mines than one to be under a single manager; (j) for prohibiting, restricting or regulating the employment of adolescents and women in mines; (k) for providing for the safety of the persons employed in a mine; (m) for providing for the safety of the roads and working places in mines; (n) for the inspection of workings and sealed off fire areas in a mine; (o) far providing for the ventilation of mines; (r) for providing for proper lighting of mines and regulating the use of safety amps therein; are sufficient to show that the very purpose of the Act may well be defeated unless suitable and practical regulations are framed to help the achievement of this purpose, Arbitrary and haphazard regulations without full consideration of their practicability and ultimate effect on the efficient working of the mines, would, apart from, often defeating the purpose of the Act, affect injuriously the general economy of the country.