The language of the source document (including inconsistencies in spelling, hyphenation, etc.) has been retained, unless listed below. Many of the proper names mentioned in the book are spelled differently from what is usual. These have been left as printed as well, unless listed below.

Page xviii, Continuous and discontinuance memory: as printed in the source document.

Page 36, so many other actors: possibly an error for so many other factors.

Page 141, Prospera: possibly an error for Prospero.

Page 205, much more developed in men than in women: probably an error for much more developed in women than in men (cf. remainder of paragraph).

Page 282, The terms in the left-hand row: as printed in the source document.

Page 307, in the left row: as printed in the source document.

Changes made

Some minor obvious typographical and punctuation errors and misprints have been corrected silently.

Footnotes have been moved to directly underneath the paragraph where they are referenced.

Page 7: Boyle-Guy-Lussac changed to Boyle-Gay-Lussac

Page 25: thelyplastic changed to thelyplasmic

Page 29: closing quote mark added after ... in different proportions.

Page 38: Postwangen changed to Postwagen

Page 69: Jeanna de la Mothe Guyon changed to Jeanne de la Mothe Guyon; Footnote 6: Hysterias if ... changed to Hysteria is ...

Page 97: Helmholz changed to Helmholtz as elsewhere

Page 118: Kloppstock changed to Klopstock

Page 160: Nebbel’s epigram changed to Hebbel’s epigram

Page 181: Ernest Mack changed to Ernest Mach

Page 185: closing quote mark added after Latin text

Page 217: Th. Bischof changed to Th. Bischoff

Page 305: TannhaÜser changed to TannhÄuser

Index: some minor spelling changes made to conform to the text.