To license and regulate auctioneers, grocers, merchants, retailers, brokers, coffee houses, confectioners, barbers, butchers, peddlers, taverns, dentists, libery stable keepers […] Provided that the macimum amount of license so imposed on any business, trade, or progession shall not exceed the following: […] Pistols, pistol cartridges, bowie knives, dirk knives, whether principal stock in trade or not, $50.00