FIFTEENTH Congress, Session I, Volume 3, Chapter 34.
An Act to establish the flag of the United States.
Sec. 1. Be it enacted in the Senate and House of Representatives of the United States of America in Congress assembled, That, from and after the fourth day of July next, the flag of the United States be thirteen horizontal stripes, alternate red and white; that the union be twenty stars, white on a blue field.
Sec. 2. Be it further enacted, That, on the admission of every new State, into the Union, one star be added to the union of the flag; and that such addition shall take effect on the fourth day of July then next succeeding such admission.
Approved, April 4, 1818.