Comme un rêve... ⎪ Like a Dream...
« Le lac a commencé à geler, cette nuit.
Le ciel est encore pur, tout s'éclaire d'un éclat inespéré... puis, en quelques minutes, un amoncellement de nuages colériques se regroupe et prend son élan. En moins d'une heure, ils sont sur nous. »
Vieille archive de Patagonie ⎪Old picture from Patagonia
Happy birthday to chemist William Henry Perkin (1838-1907)! This #lino block print ‘William Henry Perkin Discovers Mauve’ is about how the British chemist & entrepreneur made the serendipitous discovery of the 1st synthetic organic dye: mauveine.
Perkins entered the Royal College of Chemistry in London in 1853 when he was only 15, studying with August Wilhelm von Hofmann. 
1/n
#linocut #printmaking #sciart #chemistry #MastoArt #dye #histsci #chemist #FashionHistory #purple #mauve #colour
@minouette "Chemical Eye 
on the Empress's New Dress" http://www.sitnews.us/MacDougall/011105_macdougall.html
Les 48 heures de l’agriculture urbaine reviennent à Angers du 24 au 26 mai
#Mauveine was revolutionary, when it was discovered. No one had ever see a #dye that vivid in human history, and the world went crazy for it. Queen Victoria of England wore a #mauve velvet gown to her daughter's wedding in 1858, and by the end of the decade, "mauve madness" had overtaken #fashion and society. Not only that, the commercialization of aniline dye chemistry would go on to revolutionize the pharmaceutical industry, as well.
via SpaceWeather.com
EARTH'S RING CURRENT JUST SPRANG A LEAK:
"During this past weekend's strong G3-class geomagnetic storm, low-latitude #auroras spread as far south as #Texas and #Arizona. Upon further review, most of those lights were not auroras at all. Everything #red in this montage is an 'SAR arc'.
"'On Nov. 5th, the ring current was pumped up by hours of strong geomagnetic storming, with energy dissipating into these SAR arcs,' says Jeff Baumgardner of Boston University's Center for Space Physics. 'It was a global event. Our cameras registered #SAR arc activity from #Italy to #NewZealand.'
"Recent research has linked SAR arcs to another phenomenon that is not an aurora: #STEVE. The #mauve ribbon in the sky was not originally thought to have anything to do with Earth's ring current. Yet in 2015, observers in New Zealand caught a bright red SAR arc transforming itself into STEVE like a caterpillar into a butterfly.
"On Nov. 5th, Mark Savage may have witnessed the same metamorphosis over Northumberland, #UK:
"Visible to the naked eye, STEVE materialized from an overhanging red arc. 'The entire process took about 10 minutes,' says Savage. This timescale roughly matches that of another SAR-to-STEVE transition observed over Canada in April 2022. Clearly, the two phenomena are linked, but researchers aren't sure how.
"'The connection is still elusive,' says Carlos Martinis, a leading researcher in the field at Boston University. 'Sometimes SAR arcs evolve into STEVE--but not always. This is a very active field of research, involving citizen scientists and researchers.'
"Did you see an SAR arc on Nov. 5th? Submit your pictures to Spaceweather.com."
Happy birthday to chemist William Henry Perkin (1838-1907)! This #lino block print ‘William Henry Perkin Discovers Mauve’ is about how the British chemist & entrepreneur made the serendipitous discovery of the 1st synthetic organic dye: mauveine.
Perkins entered the Royal College of Chemistry in London in 1853 when he was only 15,
#linocut #printmaking #sciart #chemistry #serendipity #syntheticChemistry #dye #histstm #chemist #FashionHistory #histchem #purple #mauve #colour
Photo bonus de ce 30 juin 2022, parce que j'ai hésité pour choisir la photo du jour... 
(photos) 
#NowPlaying Bot 
Will
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