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.
Labor Unions were developed to give the workers a group that could protect their health, jobs, and wages from owners of the factories and businesses that did not take into account the safety and health and necessity of a living wage for their workers.   The first labor union in the US, was founded in Philadelphia. It came to be when workers in Philadelphia organized the Carpenter's Company; consisting of a grou â¦ p of shoemakers. The nation's first union was formed in 1794.