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Show NEW DISCOVERIES IN CARLSBAD CAVERN 309 Photograph by Willis T. Lee A THEATER CURTAIN OF DRIPSTONE AT THE ENTRANCE TO THE MUSIC ROOM Through uncounted ages water bearing carbonate of lime in solution has trickled from a crevice high in the wall, depositing its load of mineral matter in the form of a hanging curtain. Beyond this portiere is a group of stalactites, which give forth musical tones when lightly touched (see text, page 313). tractive decorations. One of the pools, which we called Mirror Lake, is about 150 feet long and is surrounded by delicately tinted onyx marble. The water of these pools appears deep blue in the white light of a gasoline lantern. At the far end of the Retreat a good climber may make his way up a series of terraces of flowstone, about 30 feet high, to the Koo Vanyu, a chamber where the curious Medusaiike formations known to science as helictites suggest the Piros' Koo Vanyu, or stone snakes (see lower illustration, page 310). A HILL WITHIN A CAVERN UNDERNEATH A MOUNTAIN Many interesting nooks and corners about Shinav's Wigwam were thus explored and mapped; others, which are difficult of access, remain unknown. On leaving the chambers grouped about |