Thalassa; an essay on the depth, temperature, and currents of the ocean . C5 o < CO ^•^ UJ I QO oo H z UJ HI < oco 111. S CO c 9o o 11 <*< CO < m Deductions from the Curve. 43 temperature of 4°. i C. at 300 fathoms, of 3° C. at 900 fathoms,and of 2° C. at 1500 fathoms. The temperature of the surfacehas fallen from 24° C. to 11°. i C. The space which containsthe three stations covers 1° 20 of latitude, and 1° 57 oflongitude—truly an extraordinary change in the distributionof temperature in so small a portion of the Atlantic. In Fig. 3, the Curves A, B, C illustrate the gr
Thalassa; an essay on the depth, temperature, and currents of the ocean . C5 o < CO ^•^ UJ I QO oo H z UJ HI < oco 111. S CO c 9o o 11 <*< CO < m Deductions from the Curve. 43 temperature of 4°. i C. at 300 fathoms, of 3° C. at 900 fathoms,and of 2° C. at 1500 fathoms. The temperature of the surfacehas fallen from 24° C. to 11°. i C. The space which containsthe three stations covers 1° 20 of latitude, and 1° 57 oflongitude—truly an extraordinary change in the distributionof temperature in so small a portion of the Atlantic. In Fig. 3, the Curves A, B, C illustrate the gradual dis-appearance towards the Azores of the same stratum, 300 fathomsin thickness, which appears in Curve A, Fig. 2. In Curve A, Fig. 4, the hump between 200 and 700fathoms (12° C. to 7°.5 C.) marks the presence of a largecurrent flowing between the Azores and Madeira; and the lowgradients of Curve B indicate the existence, between the surfaceand 1500 fathoms, of various strata of gradually decreasingtemperatures moving more or less in the same direction. Curve A, Fig. 5, shows the rise of temperature caused bythe
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Keywords: ., bookcentury1800, bookdecade1870, bookidthalassa, booksubjectocean
