The Only Photograph of Einstein’s Derivation of the Mass-Energy Equivalence? (via ptak science books)
I came across an article while researching a work by H.P. Robertson—Lectures on Relativity (Princeton 1935)—and it is much more interesting than what I was actually looking for. It seems that in the history of Einstein working his famous E = mc2 on blackboards around the world that there are no surviving pictures of the man and the chalk and the equation…
In their article “Einstein’s 1934 Two-Blackboard Derivation of Energy-Mass Equivalence” (found in the American Journal of Physics, 75 (11), November 2007, pp 978-983) David Topper and Dwight Vincent of the University of Winnipeg sort it out and reproduce a not-sharp (but essential!) halftone newspaper file photo clipping showing Einstein doing just this, using two blackboards for the derivation of the equivalence of mass and energy during a public lecture in Pittsburgh in 1934.
for those not in the know, night witches were russian lady bombers who bombed the shit out of german lines in WW2. Thing is though, they had the oldest, noisiest, crappest planes in the entire world. The engines used to conk out halfway through their missions, so they had to climb out on the wings mid flight to restart the props. the planes were also so noisy that to stop germans from hearing them combing and starting up their anti aircraft guns, they’d climb up to a certain height, coast down to german positions, drop their bombs, restart their engines in midair, and get the fuck out of dodge.
their leader flew over 200 missions and was never captured.
how the fuck is this not taught in every single history class ever
I bought a necklace today made from an old stamp at one of my favorite shops - Joanne Rossman “Purveyour of the unnecessary and the irresistible” (if you’re ever near Roslindale, be sure to stop by). It caught my fancy; I liked the colors and the couple. Of course, being me, I later felt I wanted to know where it came from and what it might mean.
After a bit of work I found it’s a stamp of the coronation of King Haakon and Queen Maud.
“She was a high-spirited child, a quality that earned her the nickname Harry… She supported charitable causes, particularly those associated with children and animals, and gave encouragement to musicians and artists…She supported the feminist Katti Anker Møller’s home for unwed mothers (1906), which was regarded as radical”
In Norway, Haakon is regarded as one of the greatest Norwegians of the twentieth century and is particularly revered for his courage during the German invasion—he threatened abdication if the government cooperated with the invading Germans—and for his leadership and preservation of Norwegian unity during the Nazi occupation… During Norway’s five years under German control, many Norwegians surreptitiously wore clothing or jewelry made from coins bearing Haakon’s “H7” monogram as symbols of resistance to the German occupation and of solidarity with their exiled king and government.
This ordinary looking snapshot was taken and planted as part of a complex WWII intelligence plan known as Operation Mincemeat.
The intention was that this photograph would make other documents secreted with it seem more authentic. These documents, passed on to German agents after they were found on a body washed up on the coast of Spain (planted by British intelligence) suggested that the Allies were not planning an invasion of southern Europe via Sicily. This led to a weakening of German defense of Sicily which assisted the eventual Allied attack. (The National Archives UK)
This is the oldest piece of music known to humankind. It’s engraved in cuneiform on a tablet from 1400 BC. It was a hymn to their goddess Nikkal.
I showed this to Eric, noting that I could believe this came from Iron and Wine or Andrew Bird. I am awed at this this path of humanity, music, history, beauty - from cuneiform to the Web. The world is an astoundingly wonderful place.
There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.