Word: layer
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Long-wave radio signals spray out from the transmitters in undulations from 200 to 25,000 metres in length. They surge through & around obstacles or up against and down from the ionized Kennelly-heaviside layer of the stratosphere. Short radio waves are not so fluid. Like light waves, which are very much shorter, short radio waves travel in straight lines only...
...rolled inland from Monterey Bay up to about 2,000 ft. The coast line was not sighted but after determining by dead reckoning and bearings on mountain peaks that we had crossed the coast we dove blindly into the fog and at about 1,200 ft. found its bottom layer. . . . Proceeding overland via Beaumont and Banning battling every inch against blistering, boisterous blasts from the desert and surrounding mountains. Even at 4,000 ft. the temperature was 94?...
...gigantic Goodyear-Zeppelin dock, the Guggenheim Airship Institute was to be dedicated this week. Features: largest vertical wind tunnel in existence, 60 ft. high; a small wind tunnel for testing instruments; meteorological tower; structural testing room. Chief problems to be attacked: nature of the so-called "boundary layer" of air, adjacent to the outer skin of an airship, and its resistant effect upon outriggers, radiators, ventilator hoods and other protrusions; study of surface wind currents which make ground-handling of an airship difficult and hazardous...
Archaeological deposits of unusually extensive proportions including a layer of Neolithic material belonging to a people living before 3000 B. C. have been discovered there...
...vestiges of several prehistoric periods were observed, ranging from the early New Stone Age through the Bronze and Iron Ages. Foundations of hut dwellings, skeletal and cremated graves, as well as quantities of ceramics, bone and stone artefacts, and a few metal objects, comprised the major finds. The Neolithic layer of the site proved to be the most important. Its yield of fine painted pottery was particularly surprising to the excavators...