Shore durometer R designation also mandates the employment of an operating stand. Some conditions and procedures that have to be met, according to DIN ISO 7619-1 standard are: The final value of the hardness depends on the depth of the indenter after it has been applied for 15 seconds on the material. If the indenter penetrates 2.54 mm (0.100 inch) or more into the material, the durometer is 0 for that scale. If it does not penetrate at all, then the durometer is 100 for that scale. It is for this reason that multiple scales exist. But if the hardness is <10
Chicago North Shore and Milwaukee Railroad 1979. The outbreak of World War II caused the railroads of the United States to see a sharp rise in traffic. Even before the imposition of rationing of fuel and rubber made auto travel difficult, the North Shore saw its freight and passenger traffic rise to record levels, in part due to the railroad serving important military facilities: the Army's Fort Sheridan just north of Highwood, and the Navy's Great Lakes Naval Training Station, just south of North Chicago. North Shore saw its traffic increase to the extent that the railroad was forced to borrow equipment from the Chicago Rapid