Concentrated around the western end of Lake Ontario from Oshawa through Toronto and Hamilton to the cascading Niagara Falls is a rich Golden Horseshoe of heavy industry, manufacturing, agriculture, world trade and nearly 3,000,000 hard-working Canadians. In this energetic part of a busy province, wrapped around the lakeshore in a 15-mile-wide band, there are 1,300 Canadians for each of its 2,000 square miles, a density of population 50 per cent greater than the Netherlands -- the world's most densely populated country. Iron and steel, automobiles, finance, construction, shipping, rubber goods, heavy electrical and communications equipment, food-packing -- these are some of the dominating features of the vibrant Golden Horseshoe glowing on the map of booming Ontario. Interspaced between the churning segments of industry stretch lush vistas of vineyards, peach orchards, apples, pears and other productive pastoral scenes. Ontario's Golden Horseshoe is a solid foundation for overall prospects of the eventual development of an industrial-residential complex as big as any on the eastern part of North America.