The National Geographic Magazine, Volume 105National Geographic Society, 1954 - Geography Indexes kept up to date with supplements. |
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Page 81
... Geiger counter . The oil that showed up with the least amount of radioactivity obviously was most efficient in preventing friction . From such tests have come improved motor oils now on the market . The tests also showed , incidentally ...
... Geiger counter . The oil that showed up with the least amount of radioactivity obviously was most efficient in preventing friction . From such tests have come improved motor oils now on the market . The tests also showed , incidentally ...
Page 83
Geiger - Müller Counter switch 83 High School Students Make Their Own Geiger Counters to Study Atomic Energy Heart of a Geiger counter is a tube filled with gas . Rays from radioactive atoms penetrating the gas produce electrical ...
Geiger - Müller Counter switch 83 High School Students Make Their Own Geiger Counters to Study Atomic Energy Heart of a Geiger counter is a tube filled with gas . Rays from radioactive atoms penetrating the gas produce electrical ...
Page 86
... Geiger counter to the depth of the limestone , then pour in acid mixed with radioactive material . Clicks from the counter , relayed to the surface , tell when the acid has risen in the well to the point where it is needed . Pres- sure ...
... Geiger counter to the depth of the limestone , then pour in acid mixed with radioactive material . Clicks from the counter , relayed to the surface , tell when the acid has risen in the well to the point where it is needed . Pres- sure ...
Contents
Britains Fabulous Crown Colony on the South China | 6 |
War and Quiet on the Laos Frontier Everyday Life Goes On | 6 |
Scotlands Golden Eagles at Home Climbing Perilous Cliffs to Lofty Eyries | 6 |
Copyright | |
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