alternation with those of elevation.--Amount and slow rate of the subsidence.--Recapitulation.
APPENDIX. Containing a detailed description of the reefs and islands in Plate III.
A scientific discovery is the outcome of an interesting process of evolution in the mind of its author. When we are able to detect the germs of thought in which such a discovery has originated, and to trace the successive stages of the reasoning by which the crude idea has developed into an epoch-making book, we have the materials for reconstructing an important chapter of scientific history. Such a contribution to the story of the "making of science" may be furnished in respect to Darwin's famous theory of coral-reefs, and the clearly reasoned treatise in which it was first fully set forth.
The subject of corals and coral-reefs is one concerning which much popular misconception has always prevailed. The misleading comparison of cor