Abstract
I SEE that at p. 296 of your journal for February last, which has recently reached Calcutta, you print a lecture by Mr. David Forbes βOn the Nature of the Earth's Interior,β in which reference is made to the Mr. W. Hopkins's method of determining whether the thickness of the earth's crust is great or small when compared with the whole radius, and to M. Delaunay's objection to it.
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PRATT, J. Thickness of the Earth's Crust . Nature 4, 28β29 (1871). https://doi.org/10.1038/004028b0
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DOI: https://doi.org/10.1038/004028b0
