20th. To provide for the prevention and extinguishment of fires; to organize, establish and equip fire companies, hose companies, and hook and ladder companies; to regulate, restrain or prohibit the erection of wooden or combustible buildings in any part of the city; to regulate and to prevent the carrying on of manufactories dangerous in causing or producing fires; to regulate the storage of gun powder, tar, pitch, rosin, saltpetre, gun cotton and all othe rcombustible or explosive material; and the use of lights, candles, and stove pipes in all stables, shops, and all other places in the city; the cleansing, burning and sweeping of chimneys or stove-pipes in the city; and to fine, regulate and prevent the discharging, firing or shooting of guns, pistols, fire-crackers, and all species of fire-works in the city.