A semitone, also called a half step or a half tone, is the smallest musical interval commonly used in Western tonal music, and it is considered the most dissonant when sounded harmonically. It is defined as the interval between two adjacent notes in a 12-tone scale (e.g. from C to C â¯).
The National Labor Union. The first large-scale U.S. union was the National Labor Union, founded in 1866 to organize skilled and unskilled laborers, farmers, and factory workers.
The American Federation of Labor (AFL) was a national federation of labor unions in the United States.It was founded in Columbus, Ohio, in May 1886 by an alliance of craft unions disaffected from the Knights of Labor, a national labor association.n 1955, the AFL merged with its longtime rival, the Congress of Industrial Organizations, to form the AFL-CIO, a federation which remains in place to this day. Together with the new union, the AFL has comprised the longest lasting and most influential labor federation in the United States.