in the germ whatever it has to turn out full-grown, throws no very brilliant light on the genesis of the Universe. [Footnote 15: Lotze's Mikrokosmus, B. iv. Kap. 2, Band ii. 33, seqq.] ii. The second and principal support of the doctrine under review is found in the realm of natural history, and in that province of it which is occupied by _living beings_. Here, it is said, in the field of observation nearest to us, we have evidence of a power in each nature to push itself and gain ground, as against all natures less favorably constituted. There is left open to it a certain range of possible variations from the type of its present individuals, of which it may avail itself in any direction that may fortify its position; and even if its own instincts did not seize at once the line of greatest strength, still, out of its several tentatives, all the feeble results would fail to win a footing, and only the residuary successes would make good their ground. The ill-equipped troops of rival possibilities being always routed, however often they return, the well-armed alone are seen upon the field, and the world is in possession of "the fittest to live." We thus obtain a principle of self-adjusting adaptation of each being to its condition, without resorting to a designing care disposing of it from without; and its development is an experimental escape from past weakness, not a pre-conceived aim at a future perfection. I have neither ability nor wish to criticise the particular indications of this law, drawn with an admirable patience and breadth of research, from every department of animated nature. Though the logical structure of the proof does not seem to me particularly solid, and the disproportion between the evidence and the conclusion is of necessity so enormous as to carry us no further than the discussion of an hypothesis, yet, for our present purpose, the thesis may pass as if established; and our scrutiny may be directed only to its bearings, should it be true.