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; unbalanced quotation marks were remedied when the change was obvious, and otherwise left unbalanced.
Illustrations in this eBook have been positioned between paragraphs and outside quotations. In versions of this eBook that support hyperlinks, the page references in the List of Illustrations lead to the corresponding illustrations.
The index was not checked for proper alphabetization or correct page references. Three missing page references were added by the Transcriber.
Page 26: “The relegation of ice” was printed that way.
Page 40: “alkanine” may be a misprint for alkaline.
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