Conditions of life in the sea : a short account of quantitative marine biological research / by James Johnstone.

  • Johnstone, James, 1870-1932.
Date:
1908
Catalogue details

Licence: In copyright

Credit: Conditions of life in the sea : a short account of quantitative marine biological research / by James Johnstone. Source: Wellcome Collection.

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    CONTENTS PART I. INTRODUCTORY. CHAPTER I. THE EXPLORATION OF THE SEA. Methods of oceanographical investigation—The Challenger—Later Ex- peditions—Oceanographical apparatus—Sounding machines—Water-sample bottles and thermometers—Salinity and density of sea water—The Inter- national Fishery Investigations—Biological investigations—Dredging and trawling—Beam trawl and otter trawl—Deej) sea dredging and trawling— Other fishing apparatus—Pelagic fishing apparatus—Tow-nets and similar apparatus Page 1 CHAPTER II. THE OCEANOGRAPHY OF THE NORTH-WESTERN OCEAN. The British Islands and the continental shelf—The Greenland-Shetland elevation—Norwegian and Atlantic basins—The fore-shore—Sea-bottom deposits—Terrigenous deposits—Pteropod Ooze—Globigerina Ooze—Radio- larian Ooze—Diatom Ooze—Red clay—Temperature of the sea—Colour and transparency of the sea—The water circulation in the North Atlantic and Polar seas—The Gulf Stream and its offshoots—The European Stream—The Wyville-Thompson barrier—The Norwegian branch of the European Stream— Perturbations and periodic variations of the European Stream—Climate and hydrography 30