The United States of America

On the east the boundary is formed by the St. Croix River and an arbitrary line to the St. John, and on the north by the Aroostook Highlands, the 45th parallel of N. lat., the St. Lawrence, and the Great Lakes. West of Lake Superior, the Rainy River, Rainy Lake, and the Lake of the Woods form the boundary; thence to Puget Sound the 49th parallel. Thereafter it drops down to the Strait of Juan de Fuca, leaving Vancouver Island to the Dominion of Canada. The Atlantic Ocean washes the entire eastern shore. On the south the Gulf of Mexico serves as the boundary to the mouth of the Rio Grande del Norte. That river separates the United States from the Republic of Mexico until at the city of El Paso it turns northward; from that point to the Colorado River an arbitrary line marks the boundary of the two republics. The Pacific Ocean forms the western boundary. +