Nature, Količina 104Sir Norman Lockyer Macmillan Journals Limited, 1919 |
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Zadetki 1–3 od 55
Stran 60
... helium to earth , and he and his colleagues provided a number of companions for argon . So , in a very short period , was recognised the existence of a group of gaseous elements forming a natural family , the molecules of which are ...
... helium to earth , and he and his colleagues provided a number of companions for argon . So , in a very short period , was recognised the existence of a group of gaseous elements forming a natural family , the molecules of which are ...
Stran 222
... helium , the presence of which in the sun's atmosphere had been detected by Lockyer twenty - five years before . The proof that helium was an inert monatomic gas like argon led to many speculations as to of the position of these new ...
... helium , the presence of which in the sun's atmosphere had been detected by Lockyer twenty - five years before . The proof that helium was an inert monatomic gas like argon led to many speculations as to of the position of these new ...
Stran 228
... helium so that all radioactive substances which emit a - rays give rise to helium . The production of helium by radioactive substances explains the occurrence of large quantities of helium in uranium and thorium minerals , and indeed ...
... helium so that all radioactive substances which emit a - rays give rise to helium . The production of helium by radioactive substances explains the occurrence of large quantities of helium in uranium and thorium minerals , and indeed ...
Vsebina
Crabtree J H British Ferns and how to Identify | xvi |
Crawford H S The Mural Paintings and Inscriptions | xxxiii |
The Direct Determination Kew Observatory 120 The Magnetic Storm of August | xxxv |
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æther appears application appointed atomic weights birds body botany Bournemouth British Association Cambridge catalysis cent chemical chemistry chemists College colour comet Committee Council Department direction discovery economic edition Editor effect electric electrons elements energy engineering existence experiments fact fifty geological give given guanidin helium illustrated important increased industry Institute interest investigation J. J. Thomson James Watt journal jubilee knowledge laboratory large number lectures London Lord Rayleigh mathematical matter means meeting ment method mineral Museum National Physical Laboratory NATURE observations obtained October organisation paper period physical plants position possible practical present President problems production Prof progress published radiation radium recent recognised record regard Robert Hadfield Royal Society scientific workers South species technical telegony telegraphy temperature theory tical tion University W. H. Bragg wireless X-rays