The transcriber constructed the cover image, and hereby transfers it into the public domain.
Original spelling and grammar has mostly been retained. For example, "Cyclopœdia", "cyclopædia", "Encyclopædia", "Encyclopœdia", "guage", "gauge" have all been retained.
Figures were moved from within paragraphs to between paragraphs.
Footnotes were re-indexed and moved to the ends of chapters.
The original page numbers are embedded in the form e.g. "[Pg135]".
A link to the INDEX was inserted into the Table of Contents.
In the Table of Contents, changed "MM. Dulong and Arrago" to "MM Dulong and Arago". Also "Blinkinsop" to "Blinkensop". Also "Wasborough's" to "Wasbrough's".
Figs. 4, 5 and 6 are all in one image. Two tubes in Fig. 4 were incorrectly labeled T′; one of these has been crossed out and changed to T. Both tubes in Fig. 6 were incorrectly labeled G. One of these was crossed out and replaced by G′. Note also that Figs. 4, 5, 6 are repeated in the text on different pages; this feature has been retained.
Page 10: "it s already" to "it is already".
Page 43: "Thu if heat" changed to "Thus if heat".