Footnotes have been moved to under the text to which they belong. Where necessary, page numbers in references to footnotes have been adjusted accordingly.
The book uses long dashes as ditto marks; several of these have been replaced with the dittoed text. Where necessary, the word Ibid. in references has been replaced with the actual title.
Minor obvious typographical and punctuation errors have been corrected silently.
The Errata have already been corrected in the text.
Fractions have been standardised m⁄n.
Page xxiv: N. B. moved from bottom of page xxiii to bottom of list.
Page xxvii: deau douce changed to d’eau douce.
Page 41: f A and G a changed to f A and g A.
Page 50: pour les mois changed to pour le mois.
Page 52: that it would changed to than it would.