J'ai longtemps interprété le petit triangle sous la flèche de réaction chimique (utilisé pour indiquer le chauffage) comme un bec Bunsen.
Imaginez ma surprise quand l'étude de l'histoire des sciences m'a fait tilter : c'est le symbole alchimique du feu !
#histsci #histchem
La démonstration expérimentale en peinture, les querelles de chapelles et un Henry Debray baladeur :
https://stm.cairn.info/revue-cahiers-d-histoire-de-l-aluminium-2019-2-page-116?lang=fr #histchem #histsci
Permanence du vocabulaire : cette bijoutière parle de "Liver of sulfur" (*sulfates de potassium), un oxydant très efficace pour donner une patine aux bijoux.
#histchem #alchemy #histsci
https://en.wikipedia.org/wiki/Liver_of_sulfur
https://youtube.com/shorts/15oT7FkhIjM?si=WJV2_cGfqPaFuy6u
Liver of sulfur - Wikipedia

Word of the day: Factitious airs, littéralement gaz artificiels, nom donné par Robert Boyle aux gaz produits par manipulation chimique (~1670)
https://en.wikipedia.org/wiki/Factitious_airs
#histsci #histchem #wordoftheday #motdujour
Factitious airs - Wikipedia

Mot du jour : Sel de Seignette, découvert entre 1648 et 1660 par le pharmacien huguenot Elie Seignette (1632–1698), vieux nom du tartrate double de sodium et de potassium.
(Merci à Michel V de faire ma culture) :)
#motdujour #histsci #histchem #whatsinaName
https://fr.wikipedia.org/wiki/Sel_de_Seignette
Sel de Seignette — Wikipédia

#Agenda Le vendredi 10 octobre, à 11h heure de Paris, conférence en ligne de Lawrence Principe sur l'alchimie et les origines de la science moderne.
(Séminaire Quintessence de Hiro Hirai)
#histsci #histchem #histchi #alchemy
"I recently read The Secrets of Alchemy by Lawrence Principe, which I loved, especially because he tries to replicate ancient alchemical recipes in his own lab. And sometimes he succeeds!
For instance, he attempts to make the “sulfur of antimony” by following the instructions in The Triumphal Chariot of Antimony (Der Triumph-Wagen Antimonii), written by an alchemist named Basil Valentine7 sometime around the year 1600. At first, all Principe gets is a “dirty gray lump”.
Then he realizes the recipe calls for “Hungarian antimony,” so instead of using pure lab-grade antimony, he literally orders some raw Eastern European ore, and suddenly the reaction works! It turns out the Hungarian dirt is special because it contains a bit of silicon dioxide, something Basil Valentine couldn’t have known."
#histsci #histchem #alchemy
https://press.uchicago.edu/ucp/books/book/chicago/S/bo12335123.html
The Secrets of Alchemy

In The Secrets of Alchemy, Lawrence M. Principe, one of the world’s leading authorities on the subject, brings alchemy out of the shadows and restores it to its important place in human history and culture. By surveying what alchemy was and how it began, developed, and overlapped with a range of ideas and pursuits, Principe illuminates the practice. He vividly depicts the place of alchemy during its heyday in early modern Europe, and then explores how alchemy has fit into wider views of the cosmos and humanity, touching on its enduring place in literature, fine art, theater, and religion as well as its recent acceptance as a serious subject of study for historians of science. In addition, he introduces the reader to some of the most fascinating alchemists, such as Zosimos and Basil Valentine, whose lives dot alchemy’s long reign from the third century and to the present day. Through his exploration of alchemists and their times, Principe pieces together closely guarded clues from obscure and fragmented texts to reveal alchemy’s secrets, and—most exciting for budding alchemists—uses them to recreate many of the most famous recipes in his lab, including those for the “glass of antimony” and “philosophers’ tree.” This unique approach brings the reader closer to the actual work of alchemy than any other book.

University of Chicago Press
"In the 25 August 2003 issue of Chemical and Engineering News, the results of a survey of the journal's readers on ‘‘the most beautiful experiments in the history of chemistry’’ were reported. First place was given to Louis Pasteur's manual separation of tartrate enantiomers."
#histsci #histchi #histchem #LesvraiesQuestions
Sourire du jour : #histsci #histmed #histchem
Pour les curieux
- green vitriol = sulfate de fer hydraté
- spirit of harthorn = esprit (=distillat) de corne de cerf = ammoniaque
- brimstone = soufre
- quicksilver = vif-argent = mercure
- aquafortis = eau-forte des graveurs = acide nitrique.
https://www.smbc-comics.com/comic/humourous
Saturday Morning Breakfast Cereal - Humourous

Saturday Morning Breakfast Cereal - Humourous

Mot et objet du jour : Pistolet de Volta, instrument de démonstration scientifique.
"Voici le pistolet de Volta pour l'expérience devenue classique de l'inflammation d'un mélange d'oxygène et d'hydrogène par l'étincelle électrique . L'appareil de Volta offre ceci de particulier qu'il est en verre très épais et qu'il a la forme d'un véritable pistolet."
https://fr.wikipedia.org/wiki/Pistolet_de_Volta
https://fr.wiktionary.org/wiki/pistolet_de_Volta
#histsci #histchem #motdujour
Pistolet de Volta — Wikipédia