OCR Text |
Show Tides Upon Land and Sea. A corrvsiKimU'iil of the Geodetic Survey has rctently made observations observa-tions with the seismograph at Mauritius Mau-ritius that have led to tho suggestion that not only the ocean and tho at mosphero but even the land may ex. porience tho effects of a dally tide running round nnd round the earth us It revolves on Its als Hut, while the tides In the ulr and tho sea aro due more to tho moon than to the sun, the supposed "land tide" arises solely from the sun's ac linn Moieover, It is caused not by the ut-ti ut-ti action of the sun but b) its heat A wave uf depression Is supposed to follow fol-low tho sun from oast to west, caused by the extraction of moisture fiom tho soil. At Mauiitlus It Is found that theio Is n relntlvo upheaval of tho land to the wost of tho place of observation from morning until evening and i rnlntlvo dnpiesslon on the samo side, or an uphenvnl to tho oast, during tho fume night |