Changed "octrahedra" to "octahedra" in the footnote on page 565.
Changed "subtance" to "substance" in footnote 11 on page 572: "that feathery substance."
Changed "ventholes" to "vent-holes" on page 580: "two or three vent-holes."
Changed "prehistoric" to "pre-historic" on page 582: "from pre-historic times."
Changed "Rawlinsons, Trans." to "Rawlinson's Trans." in the footnote on page 583.
Changed "Neavius" to "Naevius" on page 596: "Johannes Naevius."
Changed "Unständliche" to "Umständliche" in footnote 3 on page 599: "Umständliche ... Chronica."
Changed "Watts" to "Watt" on page 605: "Watt mentions it."
Changed "begininng" to "beginning" on page 611: "beginning of the sixteenth centuries."
Changed "oxidising" to "oxidizing" on page 615: "an oxidizing blast."