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Show I. .( . ,H Cause of Mysterious Sounds. Thoro Is nn old superstition that tap- '!t ping sounds In a room forotell death. ' J j A correspondent suggests that theso sounds aro omitted from wooden fur- fj 'j ulturo. "I linvo generally noticed," he . ' H j says, "that I heard thorn after a sud- , j don chango In tho tomporaturo from i l heat to cold. Heat causes furnlturo ' to expand and open tho Interstices of H tho wood, which uecomo filled with , . 1 1 air. A sudden cooling, on tho othor , ! hand, causos tho wood to contract, 1 .) and tho Interstices -then closo nnd 'U 1 forcibly oxpel tho air with these ox- " , j'j I ploslvo sounds." |