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St. Nicholas [serial] (1873)
Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 380
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a speed ofnearly 800 miles per hour—1142 feet per sec-ond, to be exact. This sound message is pickedup by a recorder at several different receiving-stations. Of course, it reaches the neareststation a fraction of a second before it ar- from this, when an airplane came near enoughactually to see one… … © Kadel & Herbert A BRITISH AVIATOK MAKING OBSERVATIONS OVER THE (iEU.MAN LINES rives at the next nearest one. The distanceof each station from the target is known bycareful measurement on the map, and the timeit takes for sound to travel from the target toeach station is accurately worked out.…Children's literature
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