The National Geographic Magazine, Volume 91National Geographic Society, 1947 - Geography Indexes kept up to date with supplements. |
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Page 303
... wind . " This " wind " does its work in a new kind of vacuum tube , the " traveling wave tube . " Short waves carrying your voice or television signals are fed in at one end of the tube and travel inside it through a coil of wire . An ...
... wind . " This " wind " does its work in a new kind of vacuum tube , the " traveling wave tube . " Short waves carrying your voice or television signals are fed in at one end of the tube and travel inside it through a coil of wire . An ...
Page 304
... wind does it , over and over , millions of times , at the same time checking the number of hits when the " wind " blows at various speeds . From this Bell scientists figure how far apart to string wires so that they won't hit each other ...
... wind does it , over and over , millions of times , at the same time checking the number of hits when the " wind " blows at various speeds . From this Bell scientists figure how far apart to string wires so that they won't hit each other ...
Page 827
... winds were freshening , and the waters seemed like the heaving breast of a sleeping giant soon to be awakened by the ... wind - harried sea into Dundas Bay where Joe was serving as watchman on a salmon spawning stream . His white tent ...
... winds were freshening , and the waters seemed like the heaving breast of a sleeping giant soon to be awakened by the ... wind - harried sea into Dundas Bay where Joe was serving as watchman on a salmon spawning stream . His white tent ...
Contents
Hunting Folk Songs in the Hebrides By Margaret Shaw Campbell | 249 |
Become a Bakhtiari By Paul Edward Case | 325 |
In Manchuria Now By W Robert Moore | 389 |
Copyright | |
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