watch at the same time gave 9° 36′ 45′′. Soon after the variation was found to be 15° 10' west. It is nearly in this situation that Mr Bouvet had 1° east. I cannot suppose that the variation has altered so much since that time, but rather think he had made some mistake in his observations. That there could be none in ours was certain, from the uniformity for some time past. Besides, we found 12° 8' west, variation, nearly under this meridian, in January 1773. During the night the wind veered round by the N.W. to N.N.E. and blew a fresh gale. At eight in the morning of the 19th, we saw the appearance of land in the direction of E. by S., or that of our course; but it proved a mere fog-bank, and soon after dispersed. We continued to steer E. by S. and S.E., till seven o'clock in the evening, when being in the latitude of 54° 42′ S., longitude 13° 3' E., and the wind having veered to N.E., we tacked and stood to N.W. under close-reefed topsails and courses; having a very strong gale attended with snow-showers. At four o'clock next morning, being in the latitude of 54° 30' S., longitude 12° 33′ east, we tacked and stretched to N.E. with a fresh gale at S.W., attended with snowshowers and sleet. At noon, being in the latitude of 54° 8′ S., longitude 12° 59′ E., with a fresh gale at W. by N., and tolerably clear weather, we steered east till ten o'clock in the evening, when we brought-to, lest we might pass any land in the night, of which we however had not the least signs. At day-break, having made sail, we bore away E., and at noon observed in latitude 54° 16′ S., longitude 16° 13′ east, which is 5° to the east of the longitude in which Cape Circumcision is said to lie; so that we began to think there was no such land in existence. I however continued to steer east, inclining a little to the south, till four o'clock in the afternoon of the next day, when we were in latitude 54° 24' S., longitude 19° 18′ east. We had now run down thirteen degrees of longitude in the very latitude assigned for Bouvet's Land. I was therefore well assured that what he had seen could be nothing but an island of ice; for, if it had been land, it is hardly possible we could have missed it, though it were ever so small. Besides, from the time of leaving the southern lands, we had not met with the least signs of any other. But even suppose suppose we had, it would have been no proof of the existence of Cape Circumcision; for I am well assured that neither seals nor penguins, nor any of the oceanic birds, are indubitable signs of the vicinity of land. I will allow that they are found on the coasts of all these southern lands; but are they not also to be found in all parts of the southern ocean? There are, however, some oceanic or aquatic birds which point out the vicinity of land; especially shags, which seldom go out of sight of it; and gannets, boobies, and menof-war birds, I believe, seldom go very far out to sea. As we were now no more than two degrees of longitude from our route to the south, when we left the Cape of Good Hope, it was to no purpose to proceed any farther to the east under this parallel, knowing that no land could be there. But an opportunity now offering of clearing up some doubts of our having seen land farther to the south, I steered S.E. to get into the situation in which it was supposed to lie. We continued this course till four o'clock the next morning, and then S.E. by E. and E.S.E., till eight in the evening, at which time we were in the latitude of 55° 25′ S., longitude 23° 22′ east, both deduced from observations made the same day; for, in the morning, the sky was clear at intervals, and afforded an opportunity to observe several distances of the sun and moon, which we had not been able to do for some time past, having had a constant succession of bad weather. Having now run over the place where the land was supposed to lie, without seeing the least signs of any, it was no longer to be doubted but that the ice-islands had deceived us as well as Mr Bouvet. The wind by this time having veered to the north, and increased to a perfect storm, attended as usual with snow and sleet, we handed the top-sails and hauled up E.N.E. under the courses. During the night the wind abated, and veered to N.W., which enabled us to steer more to the north, having no business farther south. SECTION SECTION VII. Heads of what has been done in the Voyage; with some Conjectures concerning the Formation of Ice-Islands; and an Account of our Proceedings till our Arrival at the Cape of Good Hope. I HAD now made the circuit of the southern ocean in a high latitude, and traversed it in such a manner as to leave not the least room for the possibility of there being a continent, unless near the Pole, and out of the reach of navigation. By twice visiting the tropical sea, I had not only settled the situation of some old discoveries, but made there many new ones, and left, I conceive, very little more to be done even in that part. Thus I flatter myself, that the intention of the voyage has, in every respect, been fully answered; the southern hemisphere sufficiently explored, and a final end put to the searching after a southern continent, which has, at times, ingrossed the attention of some of the maritime powers, for near two centuries past, and been a favourite theory amongst the geographers of all ages. That there may be a continent, or large tract of land, near the Pole, I will not deny; on the contrary I am of opinion there is; and it is probable that we have seen a part of it. The excessive cold, the many islands and vast floats of ice, all tend to prove that there must be land to the south; and for my persuasion that this southern land must lie, or extend, farthest to the north opposite to the southern Atlantic and Indian oceans, I have already assigned some reasons; to which I may add the greater degree of cold experienced by us in these seas, than in the southern Pacific ocean under the same parallels of latitude.' In 1 After what has been said of the utter inutility of a southern continent to any human being, or even in the way of hypothesis to explain the constitution of nature, it may seem quite unnecessary to occupy a moment's attention about any arguments for its existence. As, however, a few remarks were hazarded respecting those of a mathematical kind, it may be proper to say a word or two as to others of a physical nature. Two reasons for this supposition have been urged; viz. the presence of rivers necessary to account for the large masses of fresh-water ice found in high southern latitudes; and the existence of firm and immoveable points of land round which these masses might form. The first of these is glaringly erroneous In this last ocean, the mercury in the thermometer seldom fell so low as the freezing point, till we were in 60° and upwards; whereas in the others, it fell as low in the latitude of 54°. This was certainly owing to there being a greater quantity of ice, and to its extending farther to the north, erroneous in point of principle and fact. In the first place, it is most certain, that the waters of the ocean admit of being frozen, and that when so, they either do or do not contain the salts they held in solution, according to certain circumstances, which the argument does not require to be explained. And, secondly, it is absurd to imagine that lands in the vicinity of the Pole should have any rivers, as the snow-line, as it has been called, reaches so low down there as the surface of the earth, and as the temperature of the atmosphere, reckoning from what is known of it in high latitudes, can scarcely ever be above that point at which water becomes solid. The second argument is equally unsubstantial, and may be as readily invalidated. In fact, the principal thing requisite for the congelation of water in any circumstances of situation, is the reduction of the temperature to a certain point, to the effect of which, it is well known, the agitation of the water often materially contributes. It may be remarked also, that as the heat of the ocean seems to diminish in pretty regular progression from the surface downwards, so it is highly probable, that, even at considerable distances from the Pole, the lower strata may be in a state of congelation; much more probably, therefore, there may exist at and near the Pole, a mass of ice of indefinite size and durability, which, extending to greater or smaller distances according to different circumstances, may serve as the basis, or point d'appui, of all the islands and fields of ice discoverable in this region. Ice, in fact, is just as capable of a fixed position as earth is, or any other solid body, and may accordingly have constituted the substratum of the southern hemisphere within the polar circle, since the time that this planet assumed its present form and condition. So much then on the subject of a southern continent, which, after all, we see is not worth being disputed about, and appears to be set up, as it were, in absolute derision of human curiosity and enterprise. Wise men, it is likely, notwithstanding such promissory eulogiums as Mr Dalrymple held out, will neither venture their lives to ascertain its existence, nor lose their time and tempers in arguing about it. Cook's observation, it is perhaps necessary to remark, as to the ice extending further towards the north opposite the Atlantic and Indian oceans than any where else, may be accounted for without the supposition he makes in explanation of it. Thus certain warm currents of water may be conceived to proceed from the north, towards those other parts where the ice has not been seen to extend so far, and to prevent the formation of it to the same distance; or again, there may be islands and rocks, to which the ice adheres, in the situations mentioned by Cook. Both causes, indeed, may operate, and there may be others also quite equivalent to the effect. But it is full time to leave this merely curious subject. Mr G. F. has somewhat wittily remarked, that the opinion of the existence of a southern continent maintained by some philosophers, though much invalidated by this voyage, is nevertheless a proof of their great intelligence, considering the few data on which they could proceed. Some readers may incline, perhaps, to give as much credit to the writer, for hazarding, on about equal grounds, any opinion in opposition to it.-E. north, in these two seas than in the south Pacific; and if ice be first formed at, or near land, of which I have no doubt, it will follow that the land also extends farther north. The formation or coagulation of ice-islands has not, to my knowledge, been thoroughly investigated. Some have supposed them to be formed by the freezing of the water at the mouths of large rivers, or great cataracts, where they accumulate till they are broken off by their own weight. My observations will not allow me to acquiesce in this opinion; because we never found any of the ice which we took up incorporated with earth, or any of its produce, as I think it must have been, had it been coagulated in land-waters. It is a doubt with me, whether there be any rivers in these countries. It is certain, that we saw not a river, or stream of water, on all the coast of Georgia, nor on any of the southern lands. Nor did we ever see a stream of water run from any of the ice-islands. How are we then to suppose that there are large rivers? The valleys are covered, many fathoms deep, with everlasting snow; and, at the sea, they terminate in icy cliffs of vast height. It is here where the ice-islands are formed; not from streams of water, but from consolidated snow and sleet, which is almost continually falling or drifting down from the mountains, especially in the winter, when the frost must be intense. During that season, the ice-cliffs must so accumulate as to fill up all the bays, be they ever so large. This is a fact which cannot be doubted, as we have seen it so in summer. These cliffs accumulate by continual falls of snow, and what drifts from the mountains, till they are no longer able to support their own weight; and then large pieces break off, which we call ice-islands. Such as have a flat even surface, must be of the ice formed in the bays, and before the flat vallies; the others, which have a tapering unequal surface, must be formed on, or under, the side of a coast composed of pointed rocks and precipices, or some such uneven surface. For we cannot suppose that snow alone, as it falls, can form, on a plain surface, such as the sea, such a variety of high peaks and hills, as we saw on many of the ice-isles. It is certainly more reasonable to believe that they are formed on a coast whose surface is something similar to theirs. I have observed that all the ice-islands of any extent, and before they begin to break to pieces, are terminated by perpendicular cliffs of clear ice or frozen snow, always on one or more |
