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 the face of the steady disintegration of its rival, the fledgling American Federation of Labor struggled to maintain itself, with the group showing very slow and incremental growth in its first years, only cracking the 250,000 member mark in 1892.