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 focus switched to large, coordinated inter-factory and inter-trade strikes, leading to general strikes later on. In 1881, the American Federation of Labor was founded as a federation of national unions, and for the next three decades, union organizing and membership in the U.S. grew tremendously.he focus switched to large, coordinated inter-factory and inter-trade strikes, leading to general strikes later on. In 1881, the American Federation of Labor was founded as a federation of national unions, and for the next three decades, union organizing and membership in the U.S. grew tremendously.