Expeditions organized or participated in by the Smithsonian . Fig. 13.—Sulphur Mountain Geyser boiling, prior to small eruption. Coloringin mouth and throat of geyser varies from rich cream above to deep red andbuff below. Minor details of siliceous deposit about area flooded by hot sili-ceous water are most beautiful. Photograph by Walcott.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1912