Changes to the text (corrections to typographical errors) are listed at the end of the book. On page 45, in the reference "Beccheri's Physica Subterranea, Lipsiæ, 1738 (with supplement), 8vo., 1681-80;", no satisfactory explanation of "1681-80" has been found. Note that the publication date of Physica Subterranea is 1669.…
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