Section 2
SEC. 2. This Act shall apply to the following laborers and classes of laborers: Stokers and laborers exposed to the heat of foundries, forges, and boilers or employed in rooms where ordinarily a high temperature is maintained; Those exposed to the action of deleterious working under conditions injurious to health; Those using or handling explosives or harmful substances or employed in the production thereof; Laborers employed in quarries, mines, or underground work. Those who operate or work with machinery of such size, power or condition that it may cause death or serious injuries in case of an accident; Those working with steel, iron, and other heavy metals in foundries and construction or repair shops; Those employed in loading and discharging ships and in similar work in warehouses.