Oceanic currents. In the northern part of the Atlantic Ocean the waters are impelled in a true revolving current. That the first impulse which causes the Gulf Stream is to be sought at the southern extremity of Africa, was already known to Sir Humphry Gilbert in 1560. Influence of the Gulf Stream on the climate of Scandinavia. How it contributed to the discovery of America. Instances of Esquimaux who, aided by the returning eastward flowing portion of the warm Gulf Stream, and by north-west winds, arrived on the coasts of Europe. Such a case related by Cornelius Nepos and Pomponius Mela (of Indians given by a king of the Boii to Quintus Metellus Celer, Proconsul of Gaul); others in the time of the Othos and of Frederic Barbarossa, of Columbus and of Cardinal Bembo. Again, in the years 1682 and 1684 natives of Greenland appeared in the Orkneys 159-165 Operation of lichens and other Cryptogamia in the cold and temperate zones in preparing the way for the more rapid establishment of larger phænogamous plants. Within the tropics lichens are often replaced in this respect by succulent plants. Milk-yielding animals of the New Continent; the Lama, the Alpaca, the Guanaco 165-169 Cultivation of farinaceous grasses 169-173 On the earliest population of America 173-174 The coast nation of the Guaranis (Warraus), and the Mauritia palm of the coasts, according to the accounts given by Bembo in the Historiæ Venetæ, and those of Raleigh, Hillhouse, and Robert and Richard Schomburgk 174-182 Phenomena which long-continued drought produces in the Steppe; sand-spouts, hot winds (Mirage); awakening of crocodiles and tortoises from long summer sleep 182-190 Otomacs. General considerations on the practice of earth-eating among particular nations or tribes. Clays and earths containing Infusoria 190-196 Figures graven on rocks throughout a zone running from east to west, and extending from the Rupunuri, Essequibo, and the Pacaraima Mountains, to Caycara and the wildernesses of the Cassiquiare. Earliest notice (April 1749) of these traces of former civilization in the manuscript account of the travels of the surgeon Nicolas Hortsmann of Hildesheim, found among D’Anville’s papers 196-203 The vegetable poison Curare or Ourari 203-204 _Cataracts of the Orinoco_--p. 207 to p. 231. The Orinoco; general view of its course. Ideas excited in Columbus on seeing its embouchure. Its unknown sources are east of the Mountain of Duida and the groves of Bertholletia. Causes of the principal bends of the river 207-219