Important first edition.
Lieutaud first note here the white cells ("The globuli albicantes" p. 85), more than twenty years (1774) before the major work from William Hewson on the lymphatic system and first described the lymphocyte.
First edition in french of these work on light. Paper first published in the Edimburgh Encyclodepia" in 1827 under the title "Light", in which Herschel correctly considered astigmatism to be due to irregularity of the cornea and theorised that vision could be improved by the application of some animal jelly contained in a capsule of glass against the cornea.
At the end of part 2, there's a supplement from Quetelet on the recent discovery on light.
Published in the series "Pour Mon Plaisir ". One of 112 numbered copies (n° 65 ) printed on "n pur Fil Lafuma", from a total issue in quarto "Tellière" format of 164 copies, in addition to the various issues in octavo.