Caution: DO NOT TRY THIS AT HOME.
[This text] uses utf-8 (unicode) file encoding. If the apostrophes and quotation marks in this paragraph appear as garbage, you may have an incompatible browser or unavailable fonts. First, make sure that the browser’s “character set” or “file encoding” is set to Unicode (UTF-8). You may also need to change your browser’s default font.
The original book was published in two volumes. The format is reproduced for this e-text, except that the author’s preface (originally in Volume I) and the combined index (Volume II) are in this introductory file.
See the [end of this file] for notes on scientific terminology, spelling, Plates and chapter numbering.