The other method of passing an amendment requires a Constitutional Convention to be called by two-thirds of the legislatures of the States. That Convention can propose as many amendments as it deems necessary. Those amendments must be approved by three-fourths of the states.
The fourteenth amendment to the Constitution of the United States was proposed to the legislatures of the several States by the Thirty-ninth Congress, on June 13, 1866. It was declared, in a certificate of the Secretary of State dated July 28, 1868 to have been ratified by the legislatures of 28 of the 37 States. The dates of ratification were:
Connecticut, June 25, 1866
New Hampshire, July 6, 1866
Tennessee, July 19, 1866
New Jersey, September 11, 1866 (subsequently the legislature rescinded its ratification, and on March 24, 1868, readopted its resolution of rescission over the Governor's veto, and on Nov. 12, 1980, expressed support for the amendment);
Oregon, September 19, 1866 (and rescinded its ratification on October 15, 1868)
Vermont, October 30, 1866
Ohio, January 4, 1867 (and rescinded its ratification on January 15, 1868)
New York, January 10, 1867
Kansas, January 11, 1867
Illinois, January 15, 1867
West Virginia, January 16, 1867
Michigan, January 16, 1867
Minnesota, January 16, 1867
Maine, January 19, 1867
Nevada, January 22, 1867
Indiana, January 23, 1867
Missouri, January 25, 1867
Rhode Island, February 7, 1867
Wisconsin, February 7, 1867
Pennsylvania, February 12, 1867
Massachusetts, March 20, 1867
Nebraska, June 15, 1867
Iowa, March 16, 1868
Arkansas, April 6, 1868
Florida, June 9, 1868
North Carolina, July 4, 1868 (after having rejected it on December 14, 1866)
Louisiana, July 9, 1868 (after having rejected it on February 6, 1867)
South Carolina, July 9, 1868 (after having rejected it on December 20, 1866)
Ratification was completed on July 9, 1868.
The amendment was subsequently ratified by:
Alabama, July 13, 1868
Georgia, July 21, 1868 (after having rejected it on November 9, 1866)
Virginia, October 8, 1869 (after having rejected it on January 9, 1867)
Mississippi, January 17, 1870
Texas, February 18, 1870 (after having rejected it on October 27, 1866)
Delaware, February 12, 1901 (after having rejected it on February 8, 1867)
Maryland, April 4, 1959 (after having rejected it on March 23, 1867)
California, May 6, 1959
Kentucky, March 18, 1976 (after having rejected it on January 8, 1867)