Science: Earth's Core & Crust

Harvard, having assembled funds for a five-year survey of Earth's construction, conducted a wordy colloquium on the subject in Cambridge last week. Assembled were members of the Geological Society, the Paleontological Society and the Mineralogical Society (all "of America") who recounted terrestrial fact and surmise. Some complementary information proceeded from the A. A. A. S. meeting (see above). Items:

¶ Of Earth's volume, 99.9% "must forever remain invisible and untouchable." Yet from the indirect evidence of earthquakes, volcanoes, mines, oil wells, igneous rocks on the weathered surface it was possible for Professor...

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