What is it then that Lord Rosse has accomplished? If a man were aiming at dazzling by effects of rhetoric, he might reply: He has accomplished that which once the condition of the telescope not only refused its permission to hope for, but expressly bade man to despair of. What is it that Lord Rosse has revealed? Answer: he has revealed more by far than he found. The theatre to which he has introduced us, is _immeasurably_ beyond the old one which he found. To say that he found, in the visible universe, a little wooden theatre of Thespis, a _tréteau_ or shed of vagrants, and that he presented us, at a price of toil and of _anxiety_ that cannot be measured, with a Roman colosseum,--_that_ is to say nothing. It is to undertake the measurement of the tropics with the pocket-tape of an upholsterer. Columbus, when he introduced the Old World to the New, after all that can be said in his praise, did in fact only introduce the majority to the minority; but Lord Rosse has introduced the minority to the majority. There are two worlds, one called Ante-Rosse, and the other Post-Rosse; and, if it should come to voting, the latter would shockingly outvote the other. Augustus Cæsar made it his boast when dying, that he had found the city of Rome built of brick, and that he left it built of marble: _lateritiam invenit, marmoream reliquit_. Lord Rosse may say, even if to-day he should die, 'I found God's universe represented for human convenience, even after all the sublime discoveries of Herschel, upon a globe or spherical chart having a radius of one hundred and fifty feet; and I left it sketched upon a similar chart, keeping exactly the same scale of proportions, but now elongating its radius into one thousand feet.' The reader of course understands that this expression, founded on absolute calculations of Dr. Nichol, is simply meant to exhibit the _relative_ dimensions of the _mundus Ante-Rosseanus_ and the _mundus Post-Rosseanus;_ for as to the _absolute_ dimensions, when stated in miles, leagues or any units familiar to the human experience, they are too stunning and confounding. If, again, they are stated in larger units, as for instance diameters of the earth's orbit, the unit itself that should facilitate the grasping of the result, and which really _is_ more manageable numerically, becomes itself elusive of the mental grasp: it comes in as an interpreter; and (as in some other cases) the interpreter is hardest to be understood of the two. If, finally, TIME be assumed as the exponent of the dreadful magnitudes, time combining itself with motion, as in the flight of cannon-balls or the flight of swallows, the sublimity becomes greater; but horror seizes upon the reflecting intellect, and incredulity upon the irreflective. Even a railroad generation, that _should_ have faith in the miracles of velocity, lifts up its hands with an '_Incredulus odi_!' we know that Dr. Nichol speaks the truth; but he _seems_ to speak falsehood.