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Word: pyramidal (lookup in dictionary) (lookup stats)
Dates: during 1960-1969
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Usage:

...muon data for two months-the time necessary to get statistically valid readings-the computer will spew it all out into a cathode-ray oscilloscope. On the screen of the oscilloscope, the data will be converted into images resembling X-ray plates, one for each face of the pyramid. Chambers and corridors within the pyramid will show up as dark areas on one or more of the faces-defined by the surplus of recorded muons that penetrated these areas...

Author: /time Magazine | Title: Physics: Peering into the Pyramids | 1/6/1967 | See Source »

...dimensional oscilloscope images, like X rays, will show the presence of cavities but will not indicate how deep within the pyramid they...

Author: /time Magazine | Title: Physics: Peering into the Pyramids | 1/6/1967 | See Source »

...pinpoint their location, the scientists will move the spark chamber 35 feet away to another point within the pyramid and repeat the muon-recording process. The resulting images, combined stereoscopically with the originals, will precisely locate the hidden chambers...

Author: /time Magazine | Title: Physics: Peering into the Pyramids | 1/6/1967 | See Source »

Chephren's Secret. It is not by chance that the pyramid probe will begin with Cheops; most, if not all, of its chambers and corridors have been found, and scientists will be able to check the efficacy of the cosmic-ray technique by comparing their findings with known locations of cavities within the pyramid. By May, if the Alvarez technique checks out, they will move the spark chamber to the nearby Second Pyramid or Pyramid of Chephren...

Author: /time Magazine | Title: Physics: Peering into the Pyramids | 1/6/1967 | See Source »

Though the Second Pyramid was built by Cheops' son, only one passageway has been discovered leading into it; only one burial chamber has been found and no networks of corridors similar to those in Cheops have ever been located...

Author: /time Magazine | Title: Physics: Peering into the Pyramids | 1/6/1967 | See Source »

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