Report of the Superintendent Showing the Progress of the Work Volume 1

Report of the Superintendent Showing the Progress of the Work Volume 1

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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. 1898 edition. Excerpt: ... at the time of the new moon, when they decrease until the first quarter; they then increase until full moon, when they again decrease until the last quarter, after which they increase till the new moon; he adds that these increases ought to be understood both of their duration and speed. In regard to the annual revolution, he says that he learned from the statements of the Gaditanians, that both the ebb and flow tides were at their extremes at the summer solstice: and that hence he conjectured that they decreased until the autumnal equinox; then increased till the winter solstice; then decreased again until the vernal equinox; and finally increased until the slimmer solstice.H The following quotation refers to a condition of flood-tide resembling a bore: For in the navigation of the rivers, ii the sailors run considerable danger both in ascending and descending, owing to the violence with which the flood-tide encounters the current of the stream as it flows down. The ebbtides are likewise the cause of much damage in these estuaries, for resulting as they do from the same cause as the flood-tides, they are fireqneutly so rapid as to leave the vessel on dry land; and herds in passing over to the islands that are in these estuaries are sometimes drowned in the passage and sometimes surprised in the islands, and endeavouring to cross back again to the continent, are unable, and perish in the attempt. M Strabo is the first writer who gives, although incredulously and hpon the authority of others, some account of the tropic tides and the diurnal ineqnality: Posidonius tells us that Seleucus, a native of the country next the Erythraeau Sea, states that the regularity and irregularity of the ebb and flow of the sea follow the different positions...
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Product details

  • Paperback | 330 pages
  • 189 x 246 x 18mm | 590g
  • United States
  • English
  • black & white illustrations
  • 1236814703
  • 9781236814708