Shore durometer B, C, D, DO, E, M, O, OO, OOO, OOO-S, and R. Each scale results in a value between 0 and 100, with higher values indicating a harder material. Durometer, like many other hardness tests, measures the depth of an indentation in the material created by a given force on a standardized presser foot. This depth is dependent on the hardness of the material, its viscoelastic properties, the shape of the presser foot, and the duration of the test. ASTM D2240 durometers allows for a measurement of the initial hardness, or the indentation hardness after a given period of time.
Chicago North Shore and Milwaukee Railroad Chicago North Shore and Milwaukee Railroad The Chicago North Shore and Milwaukee Railroad, also known as the North Shore Line, was an interurban that operated between the Chicago Loop and downtown Milwaukee. The 85-mile route of the North Shore Line utilized a combination of private rights-of-way and street running as well as trackage rights over the Chicago "L" network. In addition to operating passenger and freight trains, the company also provided streetcar and motor bus services throughout its history. Originating in 1895 as an electric street railway in the city of Waukegan, the property was gradually transformed into what author