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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