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.
In the early 1900s thousands in greater Philadelphia belonged to the Industrial Workers of the World (IWW)âa militant, leftist labor union. Local 8, which organized the cityâs longshoremen, was the largest and most powerful IWW branch in the Mid-Atlantic and the IWWâs most racially inclusive branch.