(vÄ'pÉr) 1  The gaseous state of a substance that is normally liquid or solid at room temperature, such as water that has evaporated into the air. See more at vapor pressure, See also water vapor. 2  A faintly visible suspension of fine particles of matter in the air, as mist, fumes, or smoke.
The belief that blues is historically derived from the West African music including from Mali is reflected in Martin Scorsese âs often quoted characterization of Ali Farka Toure âtourÃ© s tradition as constituting THE dna of the. blues
Chicago's blues style was not only faster and more turbulent than the Southern styles: it also adopted the horns and the electric guitar. Eventually, a new term was coined for this aggressive kind of blues music: rhythm'n'blues. Its birth date is disputed. In 1946 Muddy Waters cut the first records of Chicago's electric blues. In 1947 Billboard's writer Jerry Wexler coined the term rhythm and blues for Chicago's electric blues. In 1949 the Billboard chart for race records was renamed rhythm and blues. The first major rhythm'n'blues festival was held in Los Angeles in 1950 (the Blues & Rhythm Jubilee), as important as the Carnegie Hall concert of 1938 that launched boogie woogie nationwide.