[207] Petermann’s Geog. Mittheilungen, 1871, Heft. x., p. 377.
[208] Geol. Mag., 1872, vol. ix., p. 360.
[209] “Open Polar Sea,” p. 134.
[210] Journal of the Royal Geographical Society, 1853, vol. xxiii.
[211] “Physics of Arctic Ice,” Quart. Journ. Geol. Soc. for February, 1871.
[212] Some writers have objected to the conclusion that the antarctic ice-cap is thickest at the pole, on the ground that the snowfall there is probably less than at lower latitudes. The fact is, however, overlooked, that the greater thickness of an ice-cap at its centre is a physical necessity not depending on the rate of snowfall. Supposing the snowfall to be greater at, say, lat. 70° than at 80°, and greater at 80° than at the pole; nevertheless, the ice will continue to accumulate till it is thicker at 80° than at 70°, and at the pole than it is at 80°.
[213] It is a pity that at present no record is kept, either by the Board of Trade or by the Admiralty, of remarkable icebergs which may from time to time be met with. Such a record might be of little importance to navigation, but it would certainly be of great service to science.
[214] See [Chapter XXVII.], and also Geol. Mag. for May and June, 1870, and January, 1871.
[215] Phil. Mag. for April, 1866, p. 323.
[216] Ibid., for March, 1866, p. 172.