Preliminary and Final Reports Relative to the Improvement of the Port of Manzanillo on the Pacific Coast of Mexico and the Contract for the Execution of the Works with Its Modifications Celebrated Between the Government of the Republic of

Preliminary and Final Reports Relative to the Improvement of the Port of Manzanillo on the Pacific Coast of Mexico and the Contract for the Execution of the Works with Its Modifications Celebrated Between the Government of the Republic of

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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. 1900 edition. Excerpt: ...of the Tides of the Port as follows: These averages were obtained from the rise and fall of fifty four (54) Tides, the compensation for the apparent error of the aggregates of time and elevation being found in the variations of the six (6) intervening Neap Tides, occurring at the first and last quarters of the Moon's Phases, which were omitted from the calculation. The daily succession of Tides are thus shown to consist of(I) a decided rise, due to the entrance of the Flood of the Anti--Lunar Tide, follwed by (2) the sluggish and inconsiderable Elfb ofthat Tide, which is of few hours duration and results in a reduction of the sea level to the extent of only two or three decimeters, when its decline is arrested by (3) the Flood of the Lunar Tide, whose waters are superimposed upon those of the previous Tide, raising the level ofthe sea with its summit to the maximum elevation ofthe twentyfour hours; the waters of both Tides recede with (4) the Lunar Ebb, and produce the maximum of velocities in the currents which discharge the Tidal waters from the Bay. The marked excess of the rate of decline of the Lunar Tide, giving origen to the greater velocities in the currents of the Ebb than in those of the Flood Tides, prevents a rapid accumulation of deposits within the Bay, and constantly returns to the currents of the Ocean the finer sands and sediments which are brought in by the waves and Flood Tides. The relative elevations of the various stages of the Tides in the Port of Manzanillo, are as follows: Succession of Tides Lunar Ebb Tide. The Means ofTidal Elevations employed during the survey were obtained from preliminary data, and have been found to vary from the true averages shown in the Table above, which were determined by a more...show more

Product details

  • Paperback | 28 pages
  • 189 x 246 x 2mm | 68g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236988396
  • 9781236988393