founded; but, in the mean while, we have abundant evidence of numerous and indisputable phenomena, each establishing important and undeniable conclusions; and the aggregate of these conclusions, as they gradually accumulate, will form the basis of future theories, each more and more nearly approximating to perfection; the first, and second, and third story of our edifice may be soundly and solidly constructed; although time must elapse before the roof and pinnacles of the perfect building can be completed. Admitting therefore, that we have yet much to learn, we contend that much sound knowledge has been already acquired; and we protest against the rejection of established parts, because the whole is not yet made perfect.
It was assuredly prudent, during the infancy of Geology, in the immature state of those physical sciences which form its only sure foundation, not to enter upon any comparison of the Mosaic account of creation with the structure of the earth, then almost totally unknown; the time was not then come when the knowledge of natural phenomena was sufficiently advanced to admit of any profitable investigation of this question; but the discoveries of the last half century have been so extensive in this department of natural knowledge, that, whether we will or not, the subject is now forced upon our consideration, and can no longer escape discussion. The truth is, that all observers, however various may be their speculations, respecting the secondary causes by which geological phenomena have been brought about, are now agreed in admitting the lapse of very long periods of time to have been an essential condition to the production of these phenomena.
It may therefore be proper, in this part of our inquiry, to consider how far the brief account of creation, contained in the Mosaic narrative, can be shown to accord with those natural phenomena, which will come under consideration in the course of the present essay. Indeed some examination to this question seems indispensable at the very threshold of
