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Photo CHEVREUL, Michel Eugène. 

First edition of the rarest of Chevreul's publications on color.

Michel-Eugène Chevreul (1786-1889) is known to chemists for his research on fatty acids, saponification, and the discovery of stearin, but it is as a color theorist that his name will go down in history. Chevreul was appointed director of the Manufacture des Gobelins in 1824. Responsible for overseeing the production of dyes, he supported the work of dyers with his research on color perception. Thus, in 1839, he proposed a scientific approach to color complementarity and subsequently developed "color circles." A true "Pantone" color chart, a hundred years ahead of its time, Chevreul's color circles had the dual benefit of systematizing the production of hues (each with its own name) and making it easier to understand the concept of color complementarity. Thus, complementary colors are found on the same diameter of the color wheel, Red No. 2 corresponds to Green No. 2. "I believe I can affirm that it is possible to subject colors to a reasoned nomenclature, by relating them to types classified according to a simple method, accessible to the intelligence of all those who deal with colors" (extract from the preface). The standardization of color production was to interest first and foremost the industry then in full development, but it is undoubtedly in the Impressionist movement that Chevreul's theories found their finest accomplishment. Very early on, painters were inspired by Chevreul's work in their paintings, starting with Delacroix and then Monet. We will thus remember the fields of poppies dear to the Impressionists (Van Gogh, Monet, Pissaro...) where the red dots of the flowers burst out on complementary green backgrounds. The 27 spectacular plates were printed by René-Henri Digeon using chromochalcography, the process and difficulties of which are discussed in a paragraph in the book. Digeon appears to have presented a first edition of these plates at the 1855 World's Fair, for which he received a patent from the Empress. Several of the plates in our copy appear to be from this first edition and contain errors that have been corrected in other later copies that we have been able to consult.

Photo CHAPTAL, Jean-Antoine. 

First edition of the first work of Chaptal.
First volume, only published.
After three years spent in Paris (1777-1780), Chaptal was offered in 1780 a chair of chemistry at the Royal Society of Sciences of Montpellier.
"It was from this moment that Chaptal's brilliant career in science began.
The revolution in chemistry was at hand. However, the old doctrine of phlogiston still prevailed and it was this doctrine that Chaptal taught at first and in his first courses that he took up in his first work. He then quickly rallied to the ideas developed by Lavoisier. "(Flourens. Eloge de Chaptal. 1835)
Rare (missing from the main collections on chemistry : Duveen, Ferguson, Neville ...)

Bound with :
- POULLE. Positiones chemico-medicae de Aere Vitali. Montpellier, Picot, 1784. 64 pages (a lack in the margin of page 41). Rare work on the chemical and medical properties of oxygen and its preparation. First edition.
- BERTHOLON. Des avantages que la physique et les arts qui en dépendent peuvent retirer des globes aérostatiques...Montpellier, Jean Martel Aîné, 1784. 82 pages. First edition.
- LAFFECTEUR. Rapport sur l'analyse du Rob Antisyphillitique. 1779. Ph. D. Pierres, Paris. 24 pages. First edition.
- GUER. [Dissertation physique & botanique sur la maladie nephretique et sur son véritable spécifique, le Raisin d'Ours]. 1768, Bauer, Strasbourg. 98 pages and 1 folding plate. Bound without the title page and the privilege.
- GOUBERT. Description et usage des baromètres, thermomètres et autres instrumens météorologiques. 1781. Jombert, Paris. 52 pages and 1 folding table. First edition

A presentation copy to the botanist of Dijon Jean-François Durande, for the second work (Poulle).

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