Manufacturing, wool, flax, iron, steel, and copper, is growing,--field pieces, rifled guns for hunters, and iron cannon are all made in the Colonies. England does not interfere with domestic production, but it prevents exportation, and does not allow hats to be made, lest the English production, although made of American beaver, should be lessened in demand in the Colonies. There is little ground for fear of American competition, as workmen are few there, and farming is always preferred to trades. Farmers are good fathers, and large families help economical living. Even if manufacturing increases, it cannot keep pace with the increase of population and the demand for goods. In 34 years the population of Pennsylvania increased fourfold at most, but the importation of English wares increased from L16000 Sterling to L268000,--that is seventeen times greater. In 1725 the value of such importations was L16000, in 1757, L268426. Four times the population uses much more than four times, really seventeen times more goods, because the population grows more rapidly in wealth than in numbers. Manufactures must in time be established in the Colonies, because with their prosperity likely to increase for centuries to come, England and Ireland cannot supply all the wares needed and the Colonies must provide them for their future necessities. The three largest cities are Boston, New York and Philadelphia. In 1720 the first was as large as the other two together, but since then they have grown faster. In New England there are many sea ports, but the only ports for New York and Pennsylvania are their two capitals, and they are likely to be the largest cities in America. Philadelphia has more than 3000 houses, and more than 20000 inhabitants. It is regularly laid out at right angles, and the streets extend every year. Virginia has the fewest villages and only one little town, Williamsburg, its capital. The population is scattered and every family lives on its own tobacco plantation. The Chesapeake and its affluents reach every where and the Colonists bring their tobacco by water to the Bay where it is loaded on sea going vessels. New York has great advantages for trading with the native Indians, by means of the Hudson to Albany, and thence by smaller streams to Oswego and Lake Ontario, where the great fairs for dealing with the Indians are held. From Lake Ontario there is water way to Lake Superior. The Indians bring their skins and hides from the west by water to Oswego, and New York excludes traders from Pennsylvania. Philadelphia trades with New Jersey over the Delaware River. Salt is imported in 50 or 60 vessels from Spanish South America and the Cape Verde Islands and Senegal, where it is made from saltwater, by drying in the sun.