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.
Knights of Labor (KOL) Knights of Labor (KOL), the first important national labour organization in the United States, founded in 1869. Named the Noble Order of the Knights of Labor by its first leader, Uriah Smith Stephens, it originated as a secret organization meant to protect its members from employer retaliations. Secrecy also gave the organization an emotional appeal. The organizationâs original platform was partly ideological.