246 



ICEBERGS AFFECT TEMPERATURE. 



[Ch. XII. 



temperature of the water is so chaSnged that the fish entirely 

 desert the coast. 



In the northern hemisphere icebergs are constantly floated 

 as far south in the Atlantic as the latitude of Madrid in 

 Europe, or New York in America ; the farthest point to 

 which they are habitually carried, lies to the S.E. of New- 

 foundland, in mid-ocean, and about half way between the 

 Azores and New York, in W. long. 45°. In the southern 



Fig. 10. 



+ r - ~-^-C^ r •*t<t* -'_ * 7^ . r-^ 



Iceberg seen off the Cape of Good Hope, April, 1829. 



Lat. 39° 13' S. 



Long. 48° 46' E. 



hemisphere they float to latitudes several degrees nearer 

 the equator, as, for example, to points off the Cape of Good 



Hop 



do 



and 39°."* One of these (see fig. 10) 



miles 



ing like chalk when the sun was obscured, and having the 



suo-ar when 



the sun was shining on it. 



lustre of refined 



Others rose from 250 to 300 feet above the level of the sea, 



and were therefore of great volume 



below : since it is as- 



xperiments 



^ 



sea water, that for every cubic foot seen above, there must at 

 least be eight cubic feet below water. f If ice islands from 

 the north polar regions floated as far, they might reach Cape 

 St. Vincent, and there, being drawn by the current that 

 always sets in from the Atlantic through the Straits o± 

 Gibraltar, be drifted into the Mediterranean, so that the 

 serene sky of that delightful region might soon be deformed 

 by clouds and mists. 



* On Icebergs in Low Latitudes, by was made. Phil. Trans. 1830. 

 Capt. Horsburgh, by whom the sketch f Eennell on Currents, p. 95. 







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