The National Geographic Magazine, Volume 105National Geographic Society, 1954 - Geography Indexes kept up to date with supplements. |
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Page 83
... plants , it has been found , use phos- phorus from fertilizers in the first stages of growth , but later draw most ... plants grow in controlled air containing carbon dioxide tagged with radioactive carbon . " Plants in the greenhouse ...
... plants , it has been found , use phos- phorus from fertilizers in the first stages of growth , but later draw most ... plants grow in controlled air containing carbon dioxide tagged with radioactive carbon . " Plants in the greenhouse ...
Page 84
... plants ' the plants absorbed radiocarbon . Man's New Servant , the Friendly Atom Such knowledge makes. R had no way of knowing how much digitoxin was actually used by the body and how much was unused and excreted . with the aid of ...
... plants ' the plants absorbed radiocarbon . Man's New Servant , the Friendly Atom Such knowledge makes. R had no way of knowing how much digitoxin was actually used by the body and how much was unused and excreted . with the aid of ...
Page 410
... plant which now drifts about in vast quan- tities in the Sargasso Sea cannot be identified with any known land - fast species . Scientists increasingly hold the view that the drifting plants can maintain themselves indefinitely by ...
... plant which now drifts about in vast quan- tities in the Sargasso Sea cannot be identified with any known land - fast species . Scientists increasingly hold the view that the drifting plants can maintain themselves indefinitely by ...
Contents
Britains Fabulous Crown Colony on the South China | 1 |
Scotlands Golden Eagles at Home Climbing Perilous Cliffs to Lofty Eyries | 3 |
Split Seconds in the Lives of Birds Color Film and Highspeed Flash Stop | 10 |
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