Ocean's Story; or, Triumphs of Thirty Centuries Maritime Adventures, Achievements, Explorations, Discoveries and Inventions; and of the Rise and Progress of Ship-Building and Ocean Navigation, from the Ark to the Iron Steamships

CHAPTER LVI.--Dredging in modern times--What it has taught

Chapter 5631 wordsPublic domain

us--Deep sea soundings--First attempts--Implements used for it--The chance for inventors--The temperature of the sea--Deep sea temperature--Self-regulating thermometers--Serial temperature soundings--Animal life of the sea--Deep sea dredging--The dredging apparatus of the Porcupine 652