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Each edition contains "the names and origin of the civil divisions, and the names and dates of election or appointment of the principal state and county officers from the Revolution to the present time."
Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 95. Publication of this monograph will coincide, to a precision of a few per mil, with the centenary of Henri Becquerel's discovery of "radiations actives" (C. R. Acad. Sci., Feb. 24, 1896). In 1896 the Earth was only 40 million years old according to Lord Kelvin. Eleven years later, Boltwood had pushed the Earth's age past 2000 million years, based on the first U/Pb chemical dating results. In exciting progression came discovery of isotopes by J. J. Thomson in 1912, invention of the mass spectrometer by Dempster (1918) and Aston (1919), the first measurement of the isotopic composition of Pb (Aston, 1927) and the final approach, using Pb-Pb isotopic dating, to the correct age of the Earth: close-2.9 Ga (Gerling, 1942), closer-3.0 Ga (Holmes, 1949) and closest-4.50 Ga (Patterson, Tilton and Inghram, 1953).
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This volume is of interest to researchers and students, designers, educators, and industrial trainers in such disciplines as education, cognitive, social and educational psychology, didactics, computer science, linguistics and semiotics, speech communication, anthropology, sociology and design. It includes discussions on knowledge building, designing and analyzing group interaction, design of collaborative multimedia and 3D environments, computational modeling and analysis, and software agents.