It was the "first general survey of the deep-sea collections, undertaken with a knowledge of the circumstances under which the specimens were procured. "-C. Wyville Thomson, Voyage of the Challenger, Atlantic I and II.

362 Observation stations were established and at each one

  • "The exact depth was determined
  • Sediment samples were recovered frome each station
  • Water samples from various depths were taken for physical and chemical analyses
  • Fauna were sampled at many depths using dredge or trawl for the bottom and nets for the upper depths
  • Temperature curves were determined at different depths
  • Atmospheric and Meteorological conditions were carefully observed and noted
  • Rate and direction of surface current was determined
  • Attempts were made at some stations to determine the direction and rate of movement of the water at different depths."
    -C. Wyville Thomson, Voyage of the Challenger, Atlantic I and II.

 

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