• Radiocarbon, Volume 26, Number 1 (1984)

      American Journal of Science, 1984-01-01
    • Notice to Readers and Contributors

      American Journal of Science, 1984-01-01
    • Zero BP Plus 34: 25 Years of Radiocarbon

      Deevey, Edward S. (American Journal of Science, 1984-01-01)
    • University of Wisconsin Radiocarbon Dates XXI

      Steventon, Raymond L.; Kutzbach, John E. (American Journal of Science, 1984-01-01)
    • Selective Leaching of Shells for 14C Dating

      Vita-Finzi, Claudio; Roberts, Neil (American Journal of Science, 1984-01-01)
      Although acid leaching of shell carbonates prior to 14C assay is usually desirable, under some circumstances it can worsen contamination by preferentially solving unaltered shell and thus increasing the proportion of secondary carbonate. The risk can be eliminated by monitoring the progress of leaching with the help of microscopy and x-ray diffraction.
    • Recalibration of Heidelberg 14C Laboratory Data

      Kromer, Bernd (American Journal of Science, 1984-01-01)
    • Radiocarbon—A Direct Calculation of the Period of the Grand Trend

      Carmi, Israel; Sirkes, Ziv; Magaritz, Mordeckai (American Journal of Science, 1984-01-01)
    • Radiocarbon Style Guide

      American Journal of Science, 1984-01-01
    • Museo de la Plata Radiocarbon Measurements I

      Figini, Anibal; Gomez, Gabriel; Carbonari, Jorge; Huarte, Roberto; Zubiaga, Alicia (American Journal of Science, 1984-01-01)
    • Lodz Radiocarbon Dates I

      Kanwiszer, Andrzej; Trzeciak, Pawel (American Journal of Science, 1984-01-01)
    • La Jolla Natural Radiocarbon Measurements X

      Linick, T. W. (American Journal of Science, 1984-01-01)
    • Consensus delta-13C Values

      Burleigh, Richard; Matthews, Keith; Leese, Morven (American Journal of Science, 1984-01-01)
      Selected stable carbon isotope measurements published in Radiocarbon over a 12-year period have been abstracted, plotted, and summarized, to give more reliable estimates of the mean value and range of delta-13C for five classes of natural material (human bone collagen, non-human animal bone collagen, plant materials, wood, and charcoal), and to provide a firmer base line for stable carbon isotope dietary and environmental studies.
    • British Museum Natural Radiocarbon Measurements XVII

      Burleigh, Richard; Ambers, Janet; Matthews, Keith (American Journal of Science, 1984-01-01)
    • Bomb 14C in the Ocean Surface, 1966-1981

      Nydal, Reidar; Gulliksen, Steinar; Lövseth, Knut; Skogseth, Fred H. (American Journal of Science, 1984-01-01)
      Bomb 14C has been used as a tracer for COin ocean surface water to study CO2 exchange between atmosphere and ocean. Using ordinary cargo ships for sampling, we have been able to cover some parts of the Atlantic, Pacific, and Indian Oceans for certain periods. A total number of 520 samples from 89 locations were measured during the last 15 years. The data are presented both in tables and graphs. A maximum 14C concentration (Delta-14C) of ca 20% was observed in temperate northern latitudes, and a few per cent lower at southern latitudes. A seasonal trend in the 14C variation, with summer maximum and winter minimum, was observed both in downwelling and upwelling areas.