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Washington: United States Geological Survey, 1907. Map. 11 1/2" x 14 1/2". Published by the U.S. Geological Survey after the San Francisco Earthquake and Fire of 1806, this map shows the boundary of the burned area and the "district covered largely by brick structures." Originally included as part of Humphrey's 1907 report titled "The San Francisco Earthquake and Fire of April 18, 1906 and their Effects on Structures and Structural Materials." The San Francisco earthquake and fire are considered to...
1979. Dark blue ball-point pen signature on a 3 x 5-inch card, no place, March 10, 1979. Hinged to an 11 x 8-inch page containing an image of the scientist and a small bio, housed in protective plastic. Fine condition. World acclaimed Seismologist who devised the scale of earthquake magnitude that has been the standard for measuring earth tremors since 1935, commonly referred to as the "Richter Scale."