"Here then we were standing upon the edge of a yawning crater, in full activity! Not a single step forward was it possible for us to make. In front of us lay a funnel-shaped slope, 250 feet in depth, the floor of which was covered with mud, in which stood frequent pools of boiling water of a yellow tinge. The Javanese who accompanied us stated that they had never before seen it so quiet, the crater having always been quite full of steam and vapour. On the present occasion the steam only escaped in small volumes through a few fissures in the sides of the inverted cone, and more particularly from the cracks and crevices on the exterior of the cone of scoriæ. We could perceive only water, steam, mud, and sharp-cornered fragments of rock, the débris and rubbish formed by the disintegration of the rocky masses thrown up by the crater, but not a trace, not a vestige, of any molten stream of lava, heaped up by the present crater of Gedeh. The whole history of the activity of this volcano may be compared to the explosions of a vapour cauldron in the interior of the earth, which has been heated by the masses of old trachytic lava currents in an incandescent state, but not yet thoroughly cooled, whose eruptions formed the principal means of erecting the volcanic cone. Repeatedly up to our own times has the mountain thrown up water, mud, and stones, together with fine powdered sand and volcanic ashes, which have travelled as far as Batavia, as also masses of melted stone cemented by liquefied sand, while marvellous volumes of flame were visible to an immense distance; but at no period within the memory of man has the Gedeh poured forth the hot liquid lava, or thrown up into the air melted volcanic matter. We must regard it as in its last stage, as about to become extinct, like all the other volcanoes of Java. It is the last reaction of the internal fires against the atmosphere penetrating from without. Even the most active volcanoes of Java, such as Gunung Guntur and Gunung Lamengan eject only masses of liquefied rock and scoriæ, cemented by the heat, but the regular lava currents have never been observed." While Dr. Hochstetter was occupied with this excursion to the active crater of Gedeh, the remaining members of the Expedition had reached Tjipodas at the foot of this fire-mountain, where, at an elevation of 4400 feet above sea-level, and at an annual average temperature of 63°.5 Fahr., the first attempts were made to acclimatize in Java the valuable quinquina tree (_Cinchona sp._).