p. [168] contaary -> contrary
p. [214] oxyde -> oxide
p. [216] aperature -> aperture
p. [296] M Niepce -> M. Niepcé
p. [306] torrecelian -> Torricellian
p. [307] potass -> potash
p. [350] de Roux -> le Roux
p. [423] Β -> β
p. [447] areal -> aërial
p. [456] perigree -> perigee