EXPORTS.

In this scale, moreover, tobacco is not mentioned; but that plant is now raised for the supply of every private establishment, and will assuredly form an article of export, as soon as its manufacture shall be well understood. Neither can it be doubted but that the vine and the olive will, in a short time, be abundantly cultivated; and that a greater knowledge of the climate and soil of the more northern parts of the colony, will lead to the introduction of fresh sources of wealth.

GEOGRAPHICAL FEATURES.

Having taken this hasty review of the commercial interests of the colony, we may now turn to a brief examination of its internal structure and principal natural features.

I have already given a cursory sketch of the geographical features of the whole continent. Of the vast area which its coasts embrace, the east part alone has been fully explored.

A range of hills runs along the eastern coast, from north to south, which, in different quarters, vary in their distance from the sea; at one place approaching it pretty nearly, at another, receding from it to a distance of forty miles. It is a singular fact, that there is no pass or break in these mountains, by which any of the rivers of the interior can escape in an easterly direction. Their spine is unbroken. The consequence is, that there is a complete division of the eastern and western waters, and that streams, the heads of which are close to each other, flow away in opposite directions; the one to pursue a short course to the sea; the other to fall into a level and depressed interior, the character of which will be noticed in its proper place.

GREAT PROPORTION OF BAD SOIL.

The proportion of bad soil to that which is good in New South Wales, is certainly very great: I mean the proportion of inferior soil to such as is fit for the higher purposes of agriculture. Mr. Dawson, the late superintendent of the Australian Agricultural Company's possessions, has observed, as a singular fact, that the best soil generally prevails on the summits of the hills, more especially where they are at all level. He accounts for so unusual a circumstance by the fact, that elevated positions are less subject to the effects of fire or floods than their valleys or flanks, and attributes the general want of vegetable mould over the colony chiefly to the ravages of the former element, whereby the growth of underwood, so favourable in other countries to the formation of soil, is wholly prevented. Undoubtedly this is a principal cause for the deficiency in question. There is no part of the world in which fires create such havoc as in New South Wales and indeed in Australia generally. The climate, on the one hand, which dries up vegetation, and the wandering habits of the natives on the other, which induce them to clear the country before them by conflagration, operate equally against the growth of timber and underwood.

CAUSE OF THIS.

But there is another circumstance that appears to have escaped Mr. Dawson's observation; which is the actual property of the trees themselves, as to the quantity of vegetable matter they produce in decay. Being a military man, I cannot be supposed to have devoted much of my time to agricultural pursuits; but it has been obvious to me, as it must have been to many others, that in New South Wales, the fall of leaves and the decay of timber, so far from adding to the richness of its soil, actually destroy minor vegetation. This fact was brought more home to me in consequence of its having been my lot to spend some months upon Norfolk Island, a distant penal settlement attached to the Government of Sydney. There the abundance of vegetable decay was as remarkable as the want of it on the Australian Continent. I have frequently sunk up to my knees in a bed of leaves when walking through its woods; and, often when I placed my foot on what appeared externally to be the solid trunk of a tree, I have found it yield to the pressure, in consequence of its decomposition into absolute rottenness. But such is not the case in New South Wales. There, no such accumulations of vegetable matter are to be met with; but where the loftiest tree of the forest falls to the ground, its figure and length are marked out by the total want of vegetation within a certain distance of it, and a small elevation of earth, resembling more the refuse or scoria of burnt bricks than any thing else, is all that ultimately remains of the immense body which time or accident had prostrated. Thus it would appear, that it is not less to the character of its woods than to the ravages of fire that New South Wales owes its general sterility.

CONNECTION BETWEEN THE GEOLOGY AND VEGETATION.

Whilst prosecuting my researches in the interior of the colony, I could not but be struck with the apparent connection between its geology and vegetation; so strong, indeed, was this connection, that I had little difficulty, after a short experience, in judging of the rock that formed the basis of the country over which I was travelling, from the kind of tree or herbage that flourished in the soil above it. The eucalyptus pulv., a species of eucalyptus having a glaucus-coloured leaf, of dwarfish habits and growing mostly in scrub, betrayed the sandstone formation, wherever it existed, This was the case in many parts of the County of Cumberland, in some parts of Wombat Brush, at the two passes on the great south road, over a great extent of country to the N.W. of Yass Plains, and at Blackheath on the summit of the Blue Mountains. On the other hand, those open grassy and park-like tracts, of which so much has been said, characterise the secondary ranges of granite and porphyry. The trees most usual on these tracts, were the box, an unnamed species of eucalyptus, and the grass chiefly of that kind, called the oat or forest grass, which grows in tufts at considerable distances from each other, and which generally affords good pasturage. On the richer grounds the angophora lanceolata, and the eucalyptus mammifera more frequently point out the quality of the soil on which they grow. The first are abundant on the alluvial flats of the Nepean, the Hawkesbury and the Hunter; the latter on the limestone formation of Wellington Valley and in the better portions of Argyle; whilst the cupressus calytris seems to occupy sandy ridges with the casuarina. It was impossible that these broad features should have escaped observation: it was naturally inferred from this, that the trees of New South Wales are gregarious; and in fact they may, in a great measure, be considered so. The strong line that occasionally separates different species, and the sudden manner in which several species are lost at one point, to re-appear at another more distant, without any visible cause for the break that has taken place, will furnish a number of interesting facts in the botany of New South Wales.

It was observed both on the Macquarie river and the Morumbidgee, that the casuarinae ceased at a particular point. On the Macquarie particularly, these trees which had often excited our admiration from Wellington Valley downwards, ceased to occupy its banks below the cataract, nor were they again noticed until we arrived on the banks of the Castlereagh. The blue-gum trees, again, were never observed to extend beyond the secondary embankments of the rivers, occupying that ground alone which was subject to flood and covered with reeds. These trees waved over the marshes of the Macquarie, but were not observed to the westward of them for many miles; yet they re-appeared upon the banks of New-Year's Creek as suddenly as they had disappeared after we left the marshes, and grew along the line of the Darling to unusual size. But it is remarkable, that, even in the midst of the marshes, the blue-gum trees were strictly confined to the immediate flooded spaces on which the reeds prevailed, or to the very beds of the water-courses. Where the ground was elevated, or out of the