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Show Lake That Stores Heat. There Is a lako that stores tho sun's heat at Medvo. In northenstern Tran sjivnnln. Thick beds of rock salt underlie un-derlie tho district and similar formation forma-tion appears upon tho surface In tho shape of mounds, somo of them over 100 feet in height. Amongst these thi luko rests nt fully 1,500 feet nbovo sei. level. Upon tho surface Its water Is almost sweet, four Inches below there Is a twentieth of salt, nt two feet there Is ono-tlfth nnd at llvo feet tho water Is practically saturated with salt. In September, after a summer's sun-shlno sun-shlno the thermometer showed tho lake's waters to bo 150 degrees four feet down. Even by April, nfter n wholo season of wintry weather, It had only been reduced to 80 degrees Experiments hnvo proved that this Is duo to absorption and retention of tho sun's heat by tho snlt-saturntcd solution. solu-tion. Montreal Herald. |