_Polar Regions_.--The _Societe de Geographie_ of Paris in its Proceedings publishes the following communication from M. Ch. Rabot on the new Danish expedition engaged in the exploration of the eastern coast of Greenland, under the command of Lieutenant Ryder, of the royal Danish navy. The expedition has in view the examination of the unknown coast between Franz-Josef fiord, in latitude 73°, and the most northerly point reached by Commander Holm and Lieutenant Garde, about latitude 66°. Lieutenant Ryder left Copenhagen June 7, 1891, in the Norwegian whaler _Hekla_, which had been chartered by the Danish government. The first ice was met on the 20th, in latitude 68° 12', longitude 13° 05' west. Unable to pass through the pack to the Greenland shore after several attempts, the ship proceeded northward, and in the vicinity of Jan Mayen made soundings and successful dredgings. Several attempts to reach the coast of Greenland were made from the 75th parallel southward, but without success up to July 2, when the _Hekla_ was in latitude 71° 31', longitude 6° 30' west. Since that date there has been no direct news, but on July 26, in latitude 72° 40', longitude 14° 25' west, the English whaler _Active_ saw the _Hekla_ a few miles to the northeast, heading to the south-southwest. On August 2 the _Active_, in latitude 71° 40', approached within 12 miles of the coast, and on August 20, in 70° 30', was within 7 miles of the mainland. In both instances the intervening sea was free of ice. The English captain believes that the _Hekla_ made the eastern coast in about 71° 30'. The _Hekla_ is provisioned for the winter, and there is a prospect of marked success by the Danish officers in their undertaking. * * * * * {253} _The Crossing of Tibet_.--The explorations of Mr. Rockhill in Tibet and his renewed attempt to reach Lassa, the "holy city" of that country, creates an unusual interest for Americans in the account of the crossing of Tibet by M. G. Bonvalot, Prince Henri d'Orleans, and P. Dedeken, published in the last Bulletin of the Paris Geographical Society.