File:Nature (1898) (14595132277).jpg

Identifier: nature5918981899lock (find matches)
Title: Nature
Year: 1869 (1860s)
Authors: Lockyer, Norman, Sir, 1836-1920. edt
Subjects: Science Science Sciences Biologie Physique Natuurwetenschappen CIENCIA NATURAL HISTORY BIOLOGY SCIENCE
Publisher: (London, etc., Macmillan Journals Ltd., etc.)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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Compare this with Mr. Russells results on the east•coast of Australia. In view of the well-known southerlycurrent on this coast, it is remarkable that so few of the With regard to deductions as to the speed of a currentbased on records from floats, we are almost inclined togo further than Ur. Schott, and to regard such as prac-tically valueless. The whole tendency of recent investi-gation has been to show that steady forward movement ofsurface water only occurs when there is a distinct head of water strongly controlled by the shape of the land ; thebest examples being the north and south currents movingpolewards on the eastern sides of the great land masses.These currents come to an end as soon as they get clearof the land, and their waters are distributed by driftcurrents controlled primarily by the prevailing winds,but subject to continual variation, according to the rela-tive amounts of denser and lighter water supplied by thetrue currents. But the movements of the drift currents
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papers found seem to go with it, and that the majority ofthe papers found go against the current. Evidentlygreat caution is necessary in applying the method.What seems most likely is that the relation of themovement of the float to that of the wind and of thesurface water is really a function of the strength■of the wind and the sea disturbance, and of thedensity of the water. A float may make headwaywith a current against a light wind ; but if it meetswith a cyclone, it, and perhaps a skin of water withit, may be removed from the surface of the current, amerely local disturbance transferring it to anothertnember of the oceanic circulation : yet the record■of this float would show the two currents as a continuousstream. NO. 1536. VOL. 59) ririft during the winter i are irregular in the extreme ; the water goes backwardsand forwards, the horizontal course of any particle ofwater, perhaps, resembling that of a particle of theair in the winds which drive it. The track of the Framacros

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