Transcriber’s Note
Punctuation, hyphenation, and spelling were made consistent when a predominant preference was found in the original book; otherwise they were not changed.
Simple typographical errors were corrected; unpaired quotation marks were remedied when the change was obvious, and otherwise left unpaired.
Running page headers in the original book are shown here with a gray background (in ereaders that support shaded backgrounds), placed between paragraphs and near the topics to which they refer.
Dates and locations in the headings of letters usually were on the same line in the original book, but have been placed on separate lines here.
Footnotes, originally at the bottoms of pages, have been collected, resequenced, and placed just above the Index.
Cover created by Transcriber and placed into the Public Domain.
The Index was not checked for proper alphabetization or correct page references.
Page 197: The correct title of “The Power of Movements in Plants” is “The Power of Movement in Plants.”