Simple typographical errors were corrected; occasional unbalanced quotation marks retained. Ambiguous hyphens at the ends of lines were retained. Text uses both “angakok” and “angakut”; both retained. Page 561: Footnote ‘A’ was not referenced in the text; Transcriber attributed it to the title of the article. Page 564: Transcriber’s transliteration of Greek text shown in {curly braces}. Page 575: “milkrosomen” was printed that way. Page 577: Text uses both “Quan-si” and “Quansi”; both retained. Page 580: “grewsome” was printed that way. Page 588: “where in 1861” was printed that way, but likely is a misprint, perhaps for “1681”, as the next paragraph says that the plague disappeared from Europe in the eighteenth century. Pages 601, 602: use both “Vallee” and “Vallée”; both retained. Page 645: “Moreever” was printed that way. Pages 669, 672: “Wood’s Holl” was spelled that way when this issue of the magazine was published. Page 672: Missing page reference “76” added to “Vickery” entry, based on examination of the May, 1900 issue. The other five issues of Volume 57 also are available at Project Gutenberg. The eBook numbers are 47219, 47227, 47238, 47261, and 47281. End of the Project Gutenberg EBook of The Popular Science Monthly, October, 1900, by Various