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National Physical Laboratory

Published online by Cambridge University Press:  03 June 2021

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Abstract

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Type
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Copyright
Copyright © The American Journal of Science

References

1 All dates as recalculated and republished in ref. 158 are listed in Column 4; Column 2 gives, as the second number, the reference number (81, 103, 138) but not the page of original publication. Page references to 158 omitted.

2 Residue after humic acid removal, not designated A until ref. 158.

3 Humic acid fraction, not designated B until ref. 158.

4 Sample with incomplete removal of humic acid, not designated A until ref. 158.

5 Residue after humic acid removal, :not designated B until ref. 158.