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As one who has for many years made a special study of the lunar surface, and who is thoroughly convinced that the geologist alone can now extricate selenology from the slough in which it has hopelessly stuck fast, I venture very briefly to lay the case before your readers, in the hope that some one will come forward and help us.
page 500 note 1 See his papers in the Q.J.G.S., and “Nature,” vol. xl. p. 24Google Scholar