Foreign commerce is commerce carried on with foreign countries. Certain regulations are prescribed for vessels engaged in foreign commerce, "Enter" and "Clear" ports.

All vessels registered in the United States are protected by the government in any part of the world. Only vessels can be registered by a citizen of the United States. No foreign vessel can register.

Congress regulates commerce with foreign nations and among the states, and Indian tribes.

Indian Tribes.

The government looks after the interest of "Indian affairs." There are about 300,000 Indians on 150 reservations in different states and territories all under the protection of the United States.

National Parks.

The national government has set aside several large tracts of land for National Parks. The Yellowstone National Park is about half as large as Massachusetts and is the most beautiful and interesting park in the world.

CHAPTER X.

Voter's Duty as a Citizen.