Portland is where national Prohibition started. Portland mayor and temperance leader Neal Dow led Maine to ban alcohol sales in 1851. The law led to the Portland Rum Riot in 1855. In 1845, "The Pleasure Boat" was the earliest vegetarian publication in Maine. Canned corn was developed in Portland by the N. Winslow company. By 1852 the Winslow's Patent Hermetically Sealed Green Corn was a commercial success and the company became a world leader in the canning industry. The city's Amato's Italian delicatessen claims to be the birthplace of the Italian sandwich, called "an Italian" by locals, which Amato's first served in 1903. An historic B&M Baked Beans plant built in 1913 remains in operation on the waterfront.