Year Book Volume 18

Year Book Volume 18

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ...severe storm, during which fresh sand is swept upon the beach in places and the beach itself scoured in others, the bulk of the key sands above tide-water level are saturated with a strong solution of calcium carbonate. This solution continues to trickle out through the beach sands, at ground-water level, for several days, and upon exposure to the air deposits calcium carbonate in the spaces between the bits of shell, thus forming the "beach rock." The precipitation of the CaCO, is probably due to the relief of pressure, the escape of C02, and the consequent lowering of the solubility of the CaCO3. The fact that the "beach rock" can not owe its origin to the action of putrifying matter in place, such as seaweeds, etc., is, I believe, proved by the total absence of any carbonaceous material in the rock itself. Researches on the Production of Light by Luminous Animals, by E. Newton Harvey. My previous researches on light production in Cypridina, a luminous crustacean, reported in the 1917-18 Year Book, led to the conclusion that luciferin, the oxidizable material of Cypridina, is in all probability related to the peptones, while luciferase, the catalyst in whose presence luciferin oxidizes with 'The superintendent of the Light-House Board, Mr. Putnam, assures me that he is unable to find any record of the material encountered when the excavation was made for the foundation of the light-house at loggerhead Key. 'The dissolving power of the humus acid is probably more highly effective than that of pure rain-water alone. At any rate, both have a more solvent action upon the beach-sands than ordinary sea-water. The Ph of normal sea-water is 8.2. The Ph of the "pipe water" was found to be 7.85, the decrease in acidity being...show more

Product details

  • Paperback | 186 pages
  • 189 x 246 x 10mm | 340g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236540409
  • 9781236540409