Monthly Bulletin of the Hawaiian Volcano Observatory (U.S. Geological Survey) Volume 6-8

Monthly Bulletin of the Hawaiian Volcano Observatory (U.S. Geological Survey) Volume 6-8

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ... its bank and extensive flows on its northwest innerbench threatened to go through the gap and out into northwest wall-valley. The inner floor or ring platform of this lake is wide east, north and northwest, while along the base of the uplifting south clif f there is only a broken shelled-off spatter scar 1; feet high; and the rampart is increasing so much in height that the view of the liquid from the tent i likely to be entirely cut off. All the lakes have been making a brilliant display at night. There is now fume rising from the central region and some west and south. Very respectfully, T. A. JAGGAR, JR., Volcanologist. The search for the sources of energy back of volcanic phenomena requires not only a continuous observation of the physical activities of the volcano, but also an examination of the matter thrown out from the crater. This matter consists essentially of the mineral portion (lava) and the gases. Of the various lavas and their forms we have already fairly complete infermation. This i not the case with the gaseous matter. The gaseous emanations have necessarily attracted much attention, but, from the extreme diffliculty encountered in the attempt to collect them, no really satisfactory data have been obtained thus far. Of the three attempts at such collection made by the Geophysical Laboratory expeditions, only that of 1917 resulted in satisfactory samples for quantitative study. The 1912 collection was most valuable from a qualitative standpoint especially as regards the minor constituents of the gases evolved. But it did not allow a quantitative determination of the most important constituent, namely, water vapor. On the other hand, the 1917 collection, while made under less favorable conditions, develops more

Product details

  • Paperback | 296 pages
  • 189 x 246 x 16mm | 531g
  • United States
  • English
  • black & white illustrations
  • 1236758064
  • 9781236758064