the question. Within the Arctic Circle we see vast continental masses projecting far to the north, so as to form an almost continuous belt round the icy sea; while in the southern hemisphere, the continents taper down in a vast extent of open ocean. In the north, the plains of Siberia and of the Hudson's Bay territories, warmed by the sunbeams of summer, become at that season centres of radiating heat, so that in many parts the growth of forests, or even the culture of the cereals, advances as high as 70° of latitude; while the Antarctic lands are of a comparatively small extent, and isolated in the midst of frigid waters, whose temperature scarcely varies from +29° 2' even in the height of summer. Mostly situated within the Antarctic Circle, and constantly chilled by cold sea-winds, they act at every season as refrigerators of the atmosphere.

In the north, the formation of icebergs is confined to a few mountainous countries, such as the west coast of Greenland or Spitzbergen; but the Antarc tic coast-lands generally tower to a considerable height above the level of the sea, and the vast fragments which are constantly detaching themselves from their glaciers keep up the low temperature of the seas.

In the north, the cold currents of the Polar Ocean, with their drift-ice and bergs, have but the two wide gates of the Greenland Sea and Davis's Strait through which they can emerge to the south, so that their influence is confined within comparatively narrow limits, while the gelid streams of the Antarctic seas branch out freely on all sides, and convey their floating ice-masses far and wide within the temperate seas. It is only to the west of Newfoundland that single icebergs have ever been known to descend as low as 39° of latitude; but in the southern hemisphere they have been met with in the vicinity of the Cape of Good Hope (35° S. lat.), near Tristan d'Acunha, opposite to the mouth of the Rio de la Plata, and within a hundred leagues of Tasmania. In the north, finally, we find the Gulf Stream conveying warmth even to the shores of Spitzbergen and Nova Zembla; while in the opposite regions of the globe, no traces of warm currents have been observed beyond 55° of latitude.

Thus the predominance of vast tracts of flat land in the boreal hemisphere, and of an immense expanse of ocean in the Antarctic regions, sufficiently accounts for the æstival warmth of the former, and the comparatively low summer temperature of the latter.

It is unnecessary to describe in detail each of the desolate lands which modern navigators have discovered among the Antarctic ice-fields, but it may not be uninteresting to compare one or two of these dreary wastes with the lands of the north, situated in analogous latitudes.

The New Shetland Islands, situated between 61° and 63° of Southern latitude, were originally discovered by Dirck Gheritz, a Dutch navigator, who, in attempting to round Cape Horn, was carried by tempestuous weather within sight of their mountainous coasts. Long forgotten, they were re-discovered in 1819 by Mr. Smith, a master in the royal navy-whom a storm had likewise carried thither-and in the following year more accurately examined by Edward Bransfield, whose name survives in the strait which separates them from D'Urville's Louis Philippe Land.

In 1829, the "Chanticleer," Captain Forster, was sent to New Shetland for the purpose of making magnetic and other physical observations, and remained for several months at Deception Island, which was selected as a station from its affording the best harbor in South Shetland.

Though these islands are situated at about the same distance from the pole as the Faroe Islands which boast of numerous flocks of sheep, and where the sea never freezes, yet, when the "Chanticleer" approached Deception Island, on January 5 (a month corresponding to our July), so many icebergs were scattered about, that Forster counted at one time no fewer than eighty-one. A gale having arisen, accompanied by a thick fog, great care was needed to avoid running foul of these floating cliffs. After entering the harbor-a work of no slight difficulty, from the violence of the wind-the fogs were so frequent that, for the first ten days, neither sun nor stars were seen; and it was withal so raw and cold, that Lieutenant Kendal, to whom we owe a short narrative of the expedition, did not recollect having suffered more at any time in the Arctic regions, even at the lowest range of the thermometer. In this desolate land, frozen water becomes an integral portion of the soil; for this volcanic island is composed chiefly of alternate layers of ashes and ice, as if the snow of each winter, during a series of years, had been prevented from melting in the following summer, by the ejection of cinders and ashes from some part where volcanic action still goes on. Early in March (the September of the north) the freezing over of the cove in which the ship was secured gave warning that it was high time for her to quit this desolate port. With much difficulty and severe labor, from the fury of the gales, they managed to get away, and we may fully credit Lieutenant Kendal's assertion, that it was a day of rejoicing to all on board when the shores of Deception faded from their view.

In 1775 Cook, on his second voyage, discovered the large island of South Georgia, situated in latitude 54° and 55°, a situation corresponding to that of Scarborough or Durham. But what a difference in the climate, for " we saw not a river or stream of water," says the great navigator, " on all the coast of Georgia. The head of the bay, as well as two places on each side, was terminated by perpendicular icebergs of considerable height. Pieces were continually breaking off and floating out to sea, and a great fall happened while we were in the bay, which made a noise like a cannon. The inner parts of the country were not less savage and horrible. The wild rocks raised their lofty summits till they were lost in the clouds, and the valley lay covered with everlasting snow. Not a tree was to be seen, not a shrub even big enough to make a toothpick. The only vegetation was a coarse strong-bladed grass growing in tufts, wild burnet, and a plant like moss, which sprang from the rocks. The lands, or rather rocks, bordering on the sea-coast were not covered with snow like the inland parts, but all the vegetation we could see on the clear places was the grass above mentioned. To find scenes of a similar wintry desolation, we must travel in the north as far as Nova Zembla or Spitzbergen, which are 20° or 24° nearer to the pole!

Thus the influence of the cold Antarctic waters extends far within the temperate zone. We can trace their chilling effects in Kerguelen Land (50° S.

lat.), which when visited by Cook in the height of summer was found covered with snow, and where only five plants in flower were collected; in Tierra del Fuego (53° S. lat.), where the mean summer temperature is fully 94° lower than that of Dublin (53° 21' N. lat.); in the Falkland Islands (51° 30'), which, though flat and low and near Patagonia, have, according to Mr. Darwin, a climate similar to that which is experienced at the height of between one and two thousand feet on the mountains of North Wales, with less sunshine and less frost, but more wind and rain; and finally along the south-west coast of America, where the Peruvian current and the cold sea-winds so considerably depress the snowline, that while in Europe the most southern glacier which comes down to the sea is met with, according to Von Buch, on the coast of Norway in lat. 67°; the "Beagle" found a glacier fifteen miles long and in one part seven miles broad descending to the sea-coast in the gulf of Penas, in a latitude (46° 50′) nearly corresponding with that of the Lake of Geneva.

"The position of this glacier," says Mr. Darwin, "may be put even in a more striking point of view, for it descends to the sea-coast within less than 9° from where palms grow; within 44° of a region where the jaguar and puma range over the plains, less than 24° from arborescent grasses, and (looking to the westward in the same hemisphere) less than 2° from orchideous parasites, and within a single degree of tree-ferns!" As the influence of the tropical gulf stream reaches as far as Spitzbergen, so that of the cold Peruvian stream, which issues from the Antarctic Seas, extends even to the equator, and not seldom reduces the temperature of the waters about the Galapagos to less than +584°, so that reef-building corals, which require a minimum warmth of +60°, are unable to grow near islands situated directly under the line.

Though the Antarctic lands are so bleak and inclement that not a single quadruped is to be found within 60° of latitude, yet they are the resort of innumerable sea-birds which, belonging to the same families as those of the north, generally form distinct genera or species, for with rare exceptions no bird is found to inhabit both the Arctic and the Antarctic regions.

Thus in the petrel family we find the fulmar (Procellaria glacialis) and the glacial petrel (P. gelida) of the high north represented in the Antarctic Seas by the giant petrel (Procellaria gigantea), which extends its flight from Patagonia to the ice-banks of the south, where the Antarctic and the snowy petrels (P. antarctica et nivea) first appear, cold-loving birds which never leave those dreary waters, and are often seen in vast flocks floating upon the drift-ice.

The giant petrel, which has received from the Spaniards the significant appellation of" quebranta huesos," or "break-bones," is a more powerful bird than the fulmar. It is larger than a goose, with a strong beak 44 inches long. Its color is a dirty black, white below, and with white spots on the neck and back. In its habits and manner of flight it closely resembles the albatross, and, as with the albatross, a spectator may watch it for hours together without seeing on what it feeds. Like the fulmar it feasts upon fishes, or the carcasses of seals and cetaceans, but it also chases other birds. At Port Saint Antonio it was seen by some of the officers of the "Beagle" pursuing a diver, which tried to escape by diving and flying, but was continually struck down, and at last killed by a blow

on its head. Such is its voracity that it does not even spare its own kind, for a gigantic petrel having been badly wounded by a shot from the "Terror,” and falling at too great a distance for a boat to be sent after it, was immediately attacked by two others of the same kind and torn to pieces. It is a common bird both in the open sea and in the inland channels of Tierra del Fuego, and the south-west coast of America.

The wandering albatross (Diomedea exulans), closely allied to the petrels, and rivalling the condor in size and strength of wing, may truly be ranked among the Antarctic birds, as it is seldom seen in a lower latitude than 36°, and increases in numbers towards the south. Freyssinet saw it most frequently between 55° and 59° S. lat., and it probably knows no other limits than those of the Polar ice. It is found in every meridian of this enormous zone, but the regions of storms-the Cape of Good Hope and Cape Horn-are its favorite resorts. Here it may frequently be seen in the full majesty of its flight.

The auks of the northern hemisphere are represented, in the austral regions, by the penguins, who, as Buffon remarks, are the least bird-like of all birds. Their small wing-stumps, covered with short rigid scale-like feathers, are altogether incapable of raising the body in the air, but serve as admirable paddles in the water, and on land as fore feet, with whose help they so alertly scale the grassy cliffs that they might easily be mistaken for quadrupeds. Their feet, like those of the auks, are placed so far back that the body is quite upright when the bird is standing on the ground, a position which renders their gait uncommonly slow and awkward, but greatly facilitates their movements in the water. When at sea and fishing, the penguin comes to the surface for the purpose of breathing with such a spring, and dives again so instantaneously, that at first sight no one can be sure that it is not a fish leaping for sport. Other seabirds generally keep a considerable part of their body out of the water while swimming, but this is not the case with the penguin, whose head alone appears above the surface, and thus rowing at the same time with its wings and feet, it swims so quickly that many fishes would fail to keep up with it. Sir James Ross once saw two penguins paddling away a thousand miles from the nearest land. Protected against the cold by a thick layer of fat and a warm great-coat of feathers, it remains for months on the high seas, and seeks land only in the summer for the purpose of breeding. At this time it is found in vast numbers on the Falkland Islands, Kerguelen's Land, New Shetland, or wherever in the Antarctic Seas, perhaps even to the pole itself, a convenient coast invites its stay. On Possession Island, for instance, a desolate rock, discovered by Sir James Ross in lat. 71° 56', myriads of penguins covered the whole surface of the land, along the ledges of the precipices, and even to the summit of the hills. Undaunted by the presence of beings whom they had never seen before, the birds vigorously attacked the British seamen as they waded through their ranks, and pecked at them with their sharp beaks, a reception which, together with their loud coarse notes, and the insupportable stench of their guano, made our countrymen but too happy to depart, after having loaded their boat with geological specimens and penguins. There are several species of this singular bird. The largest and rarest (Aptenodytes Forsteri) is generally found sin