Nature, Količina 80Sir Norman Lockyer Macmillan Journals Limited, 1909 |
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Stran 39
... helium in unit volume directly , that is , with- out assuming Avogadro's hypothesis and the known value of the number of molecules of any gas per unit volume . Various methods can be adopted leading to the five results given below ...
... helium in unit volume directly , that is , with- out assuming Avogadro's hypothesis and the known value of the number of molecules of any gas per unit volume . Various methods can be adopted leading to the five results given below ...
Stran 147
... helium could be detected in them . The quantity of helium found was not , however , uniformly greater in the geo- logically older materials than in younger ones of equal activity . This was hypothetically attributed to escape of helium ...
... helium could be detected in them . The quantity of helium found was not , however , uniformly greater in the geo- logically older materials than in younger ones of equal activity . This was hypothetically attributed to escape of helium ...
Stran 238
... helium from radio - active minerals by grinding : J. A. Gray . ( 1 ) Helium is liberated from thorianite , and a liberation of 28 per cent . has been effected ; ( 2 ) the smaller the mineral is ground the more helium is liberated ; ( 3 ) ...
... helium from radio - active minerals by grinding : J. A. Gray . ( 1 ) Helium is liberated from thorianite , and a liberation of 28 per cent . has been effected ; ( 2 ) the smaller the mineral is ground the more helium is liberated ; ( 3 ) ...
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Blaise E Syntheses by Means of the Mixed Zinc Organo | 29 |
lings Sir W T ThiseltonDyer 349 Flora of Ngami extraordinaria 137 | 102 |
Blennerhassett Sir Rowland Death and Obituary Notice | 103 |
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acid agricultural algæ amount apogamy appears April Archibald Geikie astronomical British carbon cent centre chemical chemistry cholesterol College colour contains dealing described direction discussion effect electric engine expedition experimental experiments fact feet gases given gives Greenwich mean heat helium hydrogen illustrated important inches interest investigation ionisation Island J. J. Thomson Karl Pearson laboratory large number lectures lines London magnetic March matter ment method miles Museum nature observations Observatory obtained original oxygen paper parthenogenesis photographs physical plants plates Poldhu position practical present pressure produced Prof published radiation radio-active radium radium bromide rays recent record reference regard Royal Society schools scientific secondary South species spectroheliograph stars steam surface tantalum technical temperature theory thorium tion tube University uranium various velocity Victoria Land volume