horse races, bowling alleys, shooting galleries, slot machines, and merry-go-rounds. 

( k ) To regulate, license and prescribe the manner and time of revoking licenses for the following businesses: Pawnbrokers, dealers in second-hand merchandise, junk dealers, brewers, distillers, money changers and brokers, public ferries, theaters, theatric al performances, cinematographs, public exhibitions, circuses, and all other performances and places of amusement, and the keeping, preparation, and sale of meat, poultry, fish, game, butter, cheese, lard, vegetables, bread and other provisions. 

( l ) To tax, license and regulate the business and fix the location of match factories, blacksmith shops, foundries, steam boilers, lumber yards, ship yards and other establishments likely to endanger the public safety by giving rise to conflagrations or ex plosions; and to regulate the storage and sale of gunpowder, tar, pitch, resin, coal, oil, gasoline, benzine, turpentine, hemp, cotton, nitroglycerin, petroleum, or any of the products thereof, and of all other highly combustible or explosive materials. 

( m ) To regulate the method of using steam engines and boilers, other than marine, to provide for the inspection thereof and for a reasonable fee for such inspection, and to regulate the issuance and revocation by the mayor of licenses to engineers engaged in operating the same. 

( n ) To provide for the suppression of houses of ill fame and other disorderly houses, gaming houses, gambling, and all fraudulent devices for the purpose of gain and of obtaining money or property; and to prohibit the printing, sale, or exhibition of immor al pictures, books, or publications of any description. 

( o ) To tax, regulate, or prohibit, or regulate the issuance and revocation by the mayor of licenses for cockfighting and cockpits, and the keeping or training of fighting cocks. 

(p) To regulate or prohibit, or provide for the issuance and revocation by the mayor of licenses for the keeping of dogs, and to authorize their impounding and destruction when running at large contrary to ordinance. 

( q ) To establish and maintain city pounds; to regulate, restrain, and 

