Nature, Količina 108Sir Norman Lockyer Macmillan Journals Limited, 1921 |
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Stran 217
... radio - active materials , Kelvin was unaware of , but we now know them to exist in the earth , and must presume them also to exist in the sun . Lord Rayleigh pro- ceeded to develop his argument for arriving at the age of uranium ...
... radio - active materials , Kelvin was unaware of , but we now know them to exist in the earth , and must presume them also to exist in the sun . Lord Rayleigh pro- ceeded to develop his argument for arriving at the age of uranium ...
Stran 284
... radio - active emission of heat . With the best data available , supposing the time elapsed since solidification to be 1.6 × 109 years , all the known facts regarding the earth's thermal condition can be co - ordinated . If the age is ...
... radio - active emission of heat . With the best data available , supposing the time elapsed since solidification to be 1.6 × 109 years , all the known facts regarding the earth's thermal condition can be co - ordinated . If the age is ...
Stran 555
... radio - active mineral . This mineral was found with chalcolite in the Belgian Congo . Analysis proved it to be a lead uranate of the composition 2PbO , 5UO ,, 4H2O . It is very radio- active , and the name 99 curite mineral . - P ...
... radio - active mineral . This mineral was found with chalcolite in the Belgian Congo . Analysis proved it to be a lead uranate of the composition 2PbO , 5UO ,, 4H2O . It is very radio- active , and the name 99 curite mineral . - P ...
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BarrettHamilton and M A C Hinton | 21 |
42s | 266 |
ROYAL AERONAUTICAL SOCIETY at Royal Society of Arts at 5 30 | 296 |
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acid æther Agriculture airship animals appears application Astronomical atomic weight British Association C. V. Raman Cambridge cent characters chemical chemistry chemists College colour Committee course discussion Edinburgh effect electric electrons energy engineering existence expedition experiments fact factors geography Geological give given hermaphroditism important India industry Institute interest investigation J. J. Thomson laboratory lecture light London Lord Rayleigh magnetic material mathematical matter ment metal Meteorological method molecule Mount Everest Museum NATURE November observations Observatory obtained October October 20 Ophion optical organisation organism original paper parallax period photographs physical plants plates possible practical present problems produced Prof published radiation radio-active rainfall recent regarded ROYAL HORTICULTURAL SOCIETY Royal Society scientific Section September soil species Spitsbergen stars suggested temperature theory thermionic emission tion University various volume