Identifier: glimpsesofournat01unit (find matches)
Title: Glimpses of our national parks
Year: 1920 (1920s)
Authors: United States. National Park Service Yard, Robert Sterling, 1861-1945
Subjects: National parks and reserves
Publisher: Washington, Govt. Print. Off.
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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incrusted basins high up into the air, often engulfingtrees of considerable size. Over the edges of these carved basinspours the hot water. Microscopic plants called algae gi-ow on theedges and sides of these basins, assisting the deposition of themineral matter and painting them hues of red and pink and bluishgray, which in warm weather glow brilliantly, but in cold weatheralmost disappear. At many other points lesser hot springs occur,introducing strange, almost uncanny, elements into wooded andotherwise quite normal landscapes. OUR NATIONAL PARKS. 15
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Photograph by J. E. Haynes, St. Paul Old Faithful Geysee, Yellowstone National Paek 16 OUR NATIONAL PARKS. A tour of these hot-water formations and spouting geysers is anexperience never to be forgotten. Some of the geysers play at quiteregular intervals. For many years the celebrated Old Faithfulplayed about every 70 minutes, but during the summer of 1915 theinterval lengthened to about 85 minutes, due to the small snowfalland consequent lessened water supply of the preceding winter; thenext year, with a return of normal snowfall, the geyser resumed itsusual intervals. Some of the largest geysers play at irregular inter-vals of days, weeks, or months. Some very small ones play everyfew minutes. Many bubbling hot springs, which throw water 2or 3 feet into the air once or twice a minute, are really small, im-perfectly formed geysers. The hot-spring terraces are also a rather awe-inspiring spectaclewdien seen for the first time. The visitor may climb upon them andpick his way around amo

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