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Published online by Cambridge University Press: 01 May 2009
After I had written the above dissertation and sent it for publication my attention was kindly drawn to a paper, dealing with the same subject, communicated by Mr. T. Mellard Reade, C.E., F.G.S., to the Liverpool Physical Society, and since republished in the May number of the GEOL. MAG. for this year (p. 203).