Population (1910), over 1,500,000 (1,549,008). Third city in rank according to population. Place of great historic interest: Founded by William Penn. Home of Benjamin Franklin. First Continental Congress met here in 1774. Declaration of Independence signed here in 1776. Capital of the nation from 1790 to 1800. First United States mint located here. A great industrial and commercial center. Ranks third in the country as a manufacturing city. Principal industries: Leads the world in the making of woolen carpets. Has the largest locomotive works in the United States. Manufactures woolen and worsted goods. Ranks high in printing and publishing, the refining of sugar, and shipbuilding. Deep-water communication with the sea. QUESTIONS FOR REVIEW AND STUDY 1. When, how, and by whom was the site of Philadelphia acquired? 2. Compare the city of 1683 with that of to-day. 3. How does Philadelphia rank in size and manufactures among the great cities of the United States? 4. Name several advantages which have helped to make the city a great industrial and commercial center. 5. What are the leading exports of the city? 6. Name some of the important industries of Philadelphia. 7. Tell what you can of Philadelphia's great iron and steel works. 8. Tell something of the history and the present importance of printing in Philadelphia. 9. Give some interesting facts about the city's great park. 10. State briefly some of the things which may be seen in a visit to the mint. 11. What events of great historical interest have taken place in Carpenters' Hall and Independence Hall? ST. LOUIS Soon after Thomas Jefferson became president of the United States, he bought from France the land known as Louisiana for $15,000,000. This sum seemed a great deal of money for a young nation to pay out, but the Louisiana Purchase covered nearly 900,000 square miles and extended from the Mississippi River to the Rocky Mountains and from the Gulf of Mexico to Canada. So when one stops to think that the United States secured the absolute control of the Mississippi and more than doubled its former area at a price less than three cents an acre, it is easier to understand why Jefferson bought than why France sold.