Punctuation, hyphenation, and spelling were made consistent when a
predominant preference was found in this book; otherwise they were not
changed.
Simple typographical errors were corrected; occasional unbalanced
quotation marks retained.
Ambiguous hyphens at the ends of lines were retained.
Page 22: “the city to-day would drive from that source” may be a
misprint for “derive”.
Page 54: “each of the tactile organ” probably should be “organs”.
Page 68: “beauxite” was spelled that way.
Page 107: Unmatched quotation mark in paragraph beginning “Geological
Formations”.