Obvious typographical errors and punctuation errors have been corrected after careful comparison with other occurrences within the text and consultation of external sources.
Some hyphens in words have been silently removed, some added, when a predominant preference was found in the original book.
Except for those changes noted below, all misspellings in the text, and inconsistent or archaic usage, have been retained.
[Pg 13]: ‘important inform ion’ replaced by ‘important information’.
[Pg 23]: ‘co-operation of the’ replaced by ‘coöperation of the’.
[Pg 62]: ‘temperature of 459°’ replaced by ‘temperature of -459°’.
[Pg 62]: ‘and 273.1° on the’ replaced by ‘and -273.1° on the’.
[Pg 70]: Table: ‘20’ replaced by ‘30’ (Temp=63, Diff=15).
[Pg 71]: Table: ‘41’ replaced by ‘51’ (Temp=112, Diff=18).
[Pg 131]: ‘thousand of chimneys’ replaced by ‘thousands of chimneys’.
[Pg 168]: ‘depth of 20.2,° and’ replaced by ‘depth of 20.2°, and’.
[Pg 210]: ‘of Pittsburg and’ replaced by ‘of Pittsburgh and’.
[Pg 214]: ‘Humbolt says’ replaced by ‘Humboldt says’.
[Pg 300]: ‘deductions thereform’ replaced by ‘deductions therefrom’.