Nature, Volume 108Sir Norman Lockyer Macmillan Journals Limited, 1921 |
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Página 217
... lead in the rocks in question proves to be not ordinary lead but wholly that sotope of atomic weight 206 which is necessarily ssociated with the decay of uranium . Thus proggerite found in the pre - Cambrian rocks at Moss , Norway ...
... lead in the rocks in question proves to be not ordinary lead but wholly that sotope of atomic weight 206 which is necessarily ssociated with the decay of uranium . Thus proggerite found in the pre - Cambrian rocks at Moss , Norway ...
Página 280
... lead - that is , an element chemically indistinguishable from lead , except by a slight difference of atomic weight and ( practically at least ) inseparable from ordinary lead by chemical means if once mixed with it . The isotope of lead ...
... lead - that is , an element chemically indistinguishable from lead , except by a slight difference of atomic weight and ( practically at least ) inseparable from ordinary lead by chemical means if once mixed with it . The isotope of lead ...
Página 307
... lead on the longer wave - length side . Data on lead have been previously given by Hull and Rice ( Phys . Rev. , vol . 8 , P. 326 , 1916 ) , who have also determined one point on the shorter wave - length side . The values of Richt ...
... lead on the longer wave - length side . Data on lead have been previously given by Hull and Rice ( Phys . Rev. , vol . 8 , P. 326 , 1916 ) , who have also determined one point on the shorter wave - length side . The values of Richt ...
Índice
Cusack Dr J The Arithmetic of the Decimal System 174 Doyle K D Agriculture and Irrigation in Continental | 7 |
BarrettHamilton and M A C Hinton Part | 21 |
Grandidier A obituary 286 Hamilton G H Observations of Mars at Flagstaff 447 | 32 |
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