| Show quietest spot sp ot on earth Is in heart of the city of utrecht in holland if you should ask your friends casually what is tile the quietest place in the world they would probably say s ay iy the alie summit of a III hagli h mountain a distant elince in the middle of tile the ocean or an isolated spot in the desert but we nee need not leave eave alie ie town own to find the quietest place in the world for it is in the heart of a etty city the city of utrecht in holland in this quiet place says a writer in the montreal Monti eal leal herald Is a room for scientific research especially built to avoid all vi bration prof 1 n a well known dutch physicist and physiologist had it built an atte attempt irIt to construct a noise proof roote had been made once before by professor Iro fessor in leipzig but that was not entirely successful the means that professor used are worthy of record in the first place tie lie built three rooms one inside the other then since a vacuum is a pool conr conductor of sound lie he nad the nit ir all pumped from between the walls the interior walls of the room were covered with six sis layers of material one layer was of stone blocks treated by a special process the file ea cavities viLies bobeen bo teen the stones were title filled with horsehair next nest to the stone were placed pin cod layers of wood and cork the rhe other cON coMil elings were layers of lead plate sen sea grass arid and paper ille walls valls were further lined with tal tapestry lestry to absorb the internal I 1 not the sit slightest latest test sound C can in penetrate to the innermost chamber in that room there rules an absolute quiet I liet |
