File:The physical geography of the sea, and its meteorology (1864) (14594403199).jpg

Identifier: physicalgeograph11maur (find matches)
Title: The physical geography of the sea, and its meteorology
Year: 1864 (1860s)
Authors: Maury, Matthew Fontaine, 1806-1873
Subjects: Ocean Marine meteorology Oceanography
Publisher: London : Sampson Low, Son & Marston
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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^ which the shot,on striking the bottom, would detach itself from the line, andsend up a specimen of the bottom. This beautiful contrivance,called Brookes Deep-sea Sounding Apparatus, is representedon p. 313. A is a cannon-ball, having a hole through it for therod B. Figure 1 represents the rod B, and the slings D D, withthe shot slung, ready for sounding. Figure 2 represents theapparatus in the act of striking the bottom; it shows how theshot is detached, and how specimens of the bottom are broughtup, by adhering to a little soap or tallow,* called arming,in the cup C, at the lower end of the rod B. AVith this con-trivance specimens of the bottom have been brought up from thedepth of nearly four miles. * The barrel of a common quill attached to the \vA has been fouud toanswer better. THE DEPTHS OF THE OCEAN. 313
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574. The deepest imrt of the Ailanilc Ocean.—The greatestdepths at which the bottom of the sea has been reached withthe plummet are in the North Atlantic Ocean, and the placeswhere it has been fathomed do not show it to be deeper thantwenty-five thousand feet. The deepest place in this ocean(Plate XI.) is probably between the parallels of 35° and 40°north latitude, and immediately to the southward of the GrandBanks of Newfoundland. The first specimens have beenreceived from the coral sea of the Indian Archipelago and fromthe North Pacific. The)^ were collected by the surveyingexpedition employed in those seas. A few soundings have beenmade in the South Atlantic, but not enough to justify deductionas to its depths or the precise shape of its floor. 575. Deep-sea soundings by the English navy.—The friends ofphysical research at sea are under obligations to the officers 314 THYSICAL GEOGBAPHY OP THE SEA, AND ITS METEOROLOGY. of the English navy for much valuable information touchin

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