Word: hummed
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...sober, somber Council chamber was filled with the sounds of waiting: the hum-buzz of bored conversation in the gallery, the deep, snoozy breathing of weary spectators who had fallen asleep, nervous coughs, the rustling of papers. Only those with very sharp ears could hear, above these sounds in Westminster's Central Hall, the pacing footsteps of the future...
...Hum & Wiggle. Soon after V-J day, the Signal Corps put Lieut. Colonel John H. DeWitt, a former radio "ham," in charge of a project called "Diana" (goddess of the moon, the wood, childbirth). No radically new apparatus was used, only a modified version of the standard "SCR-271" radar set, operating on its regular, fairly high frequency of 112 megacycles. The key play was in not sending out thousands of "pulses" of radio energy per second, which would not have allowed enough time in between for the moon echo to return; instead, Belmar sent out only one half-second...
...watts of power, echoing back from the moon came only 9/10,000,000,000,000,000 of a watt-that was strong enough to be received clearly. On the visual "scope" the echo showed as a wiggle in a luminous blue line, and could be heard as a brief hum. It came at the right time for a 450,000-mile round trip-about 2.4 seconds after the outgoing pulse...
After the second game Mary O'Neill heard her man hum a few snatches: "All I can promise is a cozy little cottage. . . ." As usual, win or lose, Steve had bran flakes with peaches for dinner. But Grimm had a trump to play. For ten days he had rested Claude Passeau's ancient and ailing arm. After the third game, Lillian Grimm's floor-pacer passed a restful night...
Then things began to hum. The great Lamaque and Sigma mines were discovered (1939 aggregate production value: nearly $7,000,000). Get-rich-quickers swarmed northward to pick up the nuggets in the wilderness. They stayed because the stories were not too far wrong...