Transcriber’s Notes
Punctuation and spelling were made consistent when a predominant preference was found in this book; otherwise they were not changed.
Simple typographical errors were corrected; occasional unbalanced quotation marks retained.
Ambiguous hyphens at the ends of lines were retained; occurrences of inconsistent hyphenation have not been changed.
Redundant chapter titles have been removed.
Text sometimes expresses fractions with a dash instead of a slash. That notation has been retained here.
The name “Van ’t Hoff” always was misprinted as “Van’t Hoff” in the original book. That misprint has been retained here.
Page [46]: The original book used “Zu” as the symbol for zinc.
Page [122]: “entirely changed by” was printed as “charged”; changed here.
Page [139]: “barometric” was printed as “barometic”; changed here.