SEC. 20. The city of Ellensburg shall have power to prevent injury or annoyance from anything dangerous, offensive, or unhealthly, and to cause any nuisance to be abated; to suppress and restrain disorderly houses, houses of ill fame and gambling houses, and to authorize the destruction of all instrument or devices used for purposes of gambling; to regulate the transportation, storing and keeping of gunpowder and other combustibles and to provide or license magazines for the same; to prevent and punish immoderate or fast riding or driving horses and other animals through the street; to regulate the speed of trains and locomotives on railways over the streets or through the city; to prevent any riots, noise, disturbance or disorderly assemblages, and to protect the property of the corporation and the persons and property of the inhabitants thereof, and to preserve peace and order therein.