In the case of the shoulder, this refers to the arm swinging out from the side of the body, in an arm-flapping motion. Range of motion is measured with the palm facing the side of the body and the arm held straight.
Black Diamond is a city in King County, Washington, United States. The population was 4,151 at the 2010 census. Based on per capita income, one of the more reliable measures of affluence, Black Diamond ranks 64th of 522 areas in the state of Washington to be ranked. Black Diamond was officially incorporated on February 19, 1959.
By 1850, this venture failed. With the discovery of coal in the nearby town of Nortonville, California, the place became a port for coaling, and adopted the name Black Diamond, after the mining firm that built the Black Diamond Coal Mining Railroad from there to Nortonville.