+ We had thought, in the simplicity of our heart, that if the book contained one comparison more justly conceived than another, and felicitously illustrative of the rationale of its author's hypothesis that, where the analogy is instituted-for illustration merely-between the cyclical changes that our globe, in all probability, has undergone, with those numerical changes, that arise after the lapse of millions of revolutions of Babbage's calculating machine, these being so many laws of its construction. Or, to venture on a humbler one of our own, as the American aloe has been embued,- _ab initio_, with the power to give out flowers only once in seventy years, he who might run his race within view of it, although of extra length, might be found stoutly denying that such a phenomenon would ever take place. Most persons. with whom we have exchanged opinions on the merits ot the book have admitted, -however much they have quarrelled with the rest, that this, at least, was a happy conception. But hear how the doctors differ! -Ouy reviewer devotes nearly a couple of