Scope and Contents Letter to Sir Archibald Geikie from Capt Clarence Edward Dutton discussing his field trip to the Sandwich Islands (now Hawaii). He reports on the large scale of the ultra basic basalt lava flows of the Mauna Loa eruption and the lack of cinder cones. He reports on the ferruginous nature of the lavas and their high olivine content along with observed layers of hematite and magnetite. He describes the volcano's impressive topography and its inability to support running water. He...