GAS SPRINGS AND MUD VOLCANOES.
Carbonic-acid Springs—Grotto del Cane—The Valley of Death
in Java—Exaggerated Descriptions—Carburetted Hydrogen
Springs—The Holy Fires of Baku—Description of the
Temple—Mud Volcanoes—The Macaluba in Sicily—Crimean Mud
Volcanoes—Volcanic Origin of Mud Volcanoes 88