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Trinity College, Dublin

Published online by Cambridge University Press:  03 June 2021

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Abstract

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Copyright
Copyright © The American Journal of Science

References

1 Laboratory was operative 1958-1.960; some earlier dates were scrutinized when repub- lished in ref. 77, but further checking has not been possible. Reference standard prior to mid-1959 was 120-yr-old oak, found to be 1% less active (after age-correction) than 0.95 x NBS oxalic acid, but this small difference was ignored (except as noted) in calculating dates.

2 Cross-check sample: Y-94, Gro-271.

3 Cross-check sample: B11-59.

4 A second dating, calculated from oxalic-acid standard.