The National Geographic Magazine, Volume 105National Geographic Society, 1954 - Geography Indexes kept up to date with supplements. |
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Page 75
BE 84 Life's Built - in Atomic Clock , Radioactive Carbon , Dates Ancient Remains Carbon dioxide absorbed from air by plants contains radioactive carbon . When animals or humans eat the plants , the isotope enters their bodies . During ...
BE 84 Life's Built - in Atomic Clock , Radioactive Carbon , Dates Ancient Remains Carbon dioxide absorbed from air by plants contains radioactive carbon . When animals or humans eat the plants , the isotope enters their bodies . During ...
Page 75
... radioactive , proving they fed upon their hosts . of radioactive material and above the sheet a detector . Increasing the thickness of the sheet Sterility a Weapon Against Flies decreases the radiation that gets through to regIn most ...
... radioactive , proving they fed upon their hosts . of radioactive material and above the sheet a detector . Increasing the thickness of the sheet Sterility a Weapon Against Flies decreases the radiation that gets through to regIn most ...
Page 75
... Radioactive bacteria have been used to test how well various soaps or detergents wash clothes . The bacteria are fed on radioactive material and 86 then placed on swatches Radioisotopes Ride Harmlessly in a Plane's Wingtip of cloth ...
... Radioactive bacteria have been used to test how well various soaps or detergents wash clothes . The bacteria are fed on radioactive material and 86 then placed on swatches Radioisotopes Ride Harmlessly in a Plane's Wingtip of cloth ...
Contents
Lifelike Man Preserved 2000 Years in Peat A Danish Bog Yields | 15 |
HoneyGuide The Bird That Eats Wax This Feathered African Entices | 18 |
Twelve National Geographic Society Scientific Projects Under Way 869 | 18 |
Copyright | |
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