We strongly recommend the perusal of the letter of Emeritus on this subject in the _Times_ of the 5th February. (16) "This vast power has penetrated the crust of the earth, and drawn from beneath it boundless treasures of mineral wealth which without its aid would have been rendered inaccessible. It has drawn up in numberless quantity the fuel on which its own life and activity depend."--_Dr. Lardner._ (17) "It seems a provision of Providence to have formed different races to bring about, by their crossing, an improved state of things. The Teutonic variety is undoubtedly the most vigorous and able, both in body and mind, of all the species of the genus of man that exist, and seems destined to conquer and civilize the world. The Teutonic variety, in its different sub-varieties, agree best with a temperate climate; it is, however, capable of bearing a high degree of cold, but seems to prosper best northward of 45 deg. of northern latitude. "Teutonic prevailing in Great Britain and part of Ireland, 22,000,000."--_Physical Atlas of Natural Phenomena._--_Alex. Keith Johnson._ And it is very curious to observe, that, in the new world, the first colony of Great Britain we reach after crossing the Atlantic is called Nova Scotia; and the last land we should leave after crossing the continent would be New Caledonia; and both in Nova Scotia and New Caledonia (Vancouver's Island) nature seems to have placed great deposits of coal, as if she there intended the industry of man and the advancement of science to overcome all natural barriers between the different nations of the earth. (18) "A pint of water may be evaporated by two ounces of coal. In its evaporation it swells into 216 gallons of steam, with a mechanical force sufficient to raise a weight of thirty-seven tons a foot high. The steam thus generated has a pressure equal to the common atmospheric air; and by allowing it to expand by virtue of its elasticity, a further mechanical force may be obtained at least equal in amount to the former. A pint of water, therefore, and two ounces of common coal, are thus rendered capable of doing as much work as is equivalent to seventy-four tons raised a foot high." "The Menai Bridge consists of about 2000 tons of iron, and its height above the level of the sea is 120 feet; its mass might be lifted from the level of the water to its present position by the combustion of four bushels of coal."--_Dr. Lardner._ (19) "In addition to the instances of combination between directly competing companies, recent experience has furnished numerous instances of the tendency of smaller lines, sanctioned as independent undertakings, to resign their independence into the hands of more powerful neighbours."--_Report of Board of Trade._ It is not to be doubted, therefore, that all proposed or partly finished Railways in the North American provinces will readily join in the grand undertaking, making one great interest for the whole.