doubt in time it would beneficially affect, converting them first into meadows, and possibly afterwards into land favourable for the growth of certain green crops. The liquid might also be conveyed to estuaries which it might be desirable to fill up, and the numerous small tidal harbours which the extension of railways will speedily render of little or no value to the inhabitants. The mud deposited in tidal harbours or on the banks of rivers within the influence of the tide is of no value as a manure; when spread over the fields, the result is the loss of the crops for some years. Civilization on the banks of the Thames is no doubt very different and very superior to what it possibly can be on the banks of the Yellow River, but as, _non omnia possumus_, as different races and nations, like individuals, have each their peculiar excellences and forms of civilization, excelling in some, deficient in other qualities of mind and body, it may undoubtedly happen that even the English of the present day, the most perfectly civilized nation on the earth, or that ever lived, might take a hint from some other nations on points respecting which their otherwise inimitable genius seems to show some slight deficiencies. As regards art, for example, we owe some hints to the pitiful States of ancient Athens and Corinth; the despicable Copt had connected the Mediterranean and Red Sea by a canal--the art of re-opening which seems now to be lost; even the miserable native Peruvian and Mexican had carried the arts of mining, of irrigation, and the use of artificial manures, to an extent which surprises the men of modern times, who, in Britain at least, think that civilization really only appeared in the world during the reign of Queen Anne, as in France the era of the Grand Monarque is universally admitted to be the period when the French nation first threw off its primitive barbarous and Celtic form of civilization, assuming the character and social habits of that race to whom they owe their name, though not their descent. If we cast our eyes over the surface of the earth, aided by the lights, somewhat obscure, no doubt, of history, certain facts rising above the ocean of detail appear as landmarks. The philosophic historian points to, as peculiarly within his province, the transfer of the seat of power from nation to nation, from race to race; how before Alexander appeared there seemed to have been a Sesostris; after the son of Philip came Julius the Dictator; then Napoleon; and drawing conclusions as to the future from the past, historians see no improbability, at least no impossibility, in New Zealand, after the lapse of many centuries, producing the Hume of the southern hemisphere; whilst a future capital arising in the desert regions of Siberia or Northern America, may one day dictate to the world.[57] Ever at variance as to the rise and fall of empires, they are yet agreed as to certain