Other
Scientific paper
Mar 1957
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1957gecoa..11..165p&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 11, Issue 3, pp.165-170
Other
1
Scientific paper
Two samples of NH 4 C1, two of caliche, eight of Wealden coal, five of Carboniferous coal, three of living trees and one air sample were studied. The NH 4 C1 samples formed a distinct group about 1 % heavier than the air sample. The other samples showed variations of some parts per thousand from the air sample. The Wealden-coal nitrogen is heavier than the Carboniferous-coal nitrogen, this being contrary to the results found for the carbon isotopes.
Pakwel A.
Ryhage R.
Wickman Frans E.
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