ART XXVI.--Notes on the Volcanoes of Northern California, Oregon and Washington Territory

DURING the autumn of 1870 the geologists attached to the Geological Exploration of the Fortieth Parallel made a preliminary reconnaissance of several of the extinct volcanic cones of Northern California, Oregon and Washington Territory for the purpose of planning detailed investigations of the principal volcanoes of the Sierra and Cascade Ranges. A further study of these volcanoes however was never undertaken, and although the explorers brought back most interesting geological and lithological material the results and observations of the work have never been published, with the exception of an announcement in this Journal for March, 1871, of "The discovery of actual glaciers on the mountains of the Pacific Slope," and a popular paper on "The volcanoes of the United States Pacific Coast," read by Mr.