Memoirs of the Museum of Comparative Zool Ogy at Harvard College Volume 2

Memoirs of the Museum of Comparative Zool Ogy at Harvard College Volume 2

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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. 1876 edition. Excerpt: ...obtained at first inside of the hundred-fathom line, but the deeper waters of the Gulf Stream soon began to add collections of still greater interest, if of less extent. Simple contrivances were substituted for the usual tallow arming the lead, so as to bring up the sand or mud in sufficient and uncontaminated quantities. Every specimen is placed in a small bottle, labelled with the date, geographical position, and depth, and preserved in cabinets arranged for the purpose in the Coast Survey Office in Washington. The microscopical examination of the collection was begun by the late Professor J. W. Bailey, of the Military Academy at West Point, and after his death by myself, in the intervals of other duties. The general results are exhibited on the map accompanying the paper in the Geographische Mittheilungen, and representing the bottom off our coast, from Cape Cod to the island of Cuba. The bottom is represented of different colors, according to its principal constituents, which are chiefly of four different kinds, --silicious sand, clay (the " mud" or "ooze" of the charts), Globigerina mud, and coral sand or mud. The silicious sand and the Globigerina mud have the greatest extent. Silicious sand is, with few exceptions, the prevailing material from the shore to the hundred-fathom line. It extends thus, skirting the shore in a broad band narrowing down to a point as far south as Cape Florida, where it ceases altogether, and is replaced by the coral formation, but reappears again on the west coast of the peninsula near Cape Sable. Clay or mud occurs to a considerable extent only to the southward of the Vineyard Islands and eastern part of Long Island, in a region known to navigators as the Block Island Soundings, and...
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Product details

  • Paperback | 104 pages
  • 189 x 246 x 6mm | 200g
  • English
  • Illustrations, black and white
  • 1236858190
  • 9781236858191