The mine inspector shall also have the right, and it is hereby made his duty, to make inquiry into the condition of such mine, bank or colliery workings, machinery, ventilation, drainage, method of lighting or using lights, electric power, use of explosives, timbering practices, roof support, transportation, and into all matters and things connected with or relating to, as well as to make suggestions providing for, the health and safety of persons employed in or about the same, and especially to make inquiry whether the provisions of this act have been complied with.