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Posts Tagged ‘Principia

“South America must have lain alongside Africa and formed a unified block which was split in two in the Cretaceous; the two parts must then have become increasingly separated over a period of millions of years like pieces of a cracked ice floe in water”*…

Earth, 600 million years ago. The Ediacaran Period; life is evolving in the sea, and multicellular life is just beginning to emerge.

From the good folks who brought you Dinosaur Pictures, a chance to watch continental drift at work– a marvelous interactive model of the earth that you can view from the present to 600 million years ago: Ancient Earth.

* Arthur Wegener


As we marvel at the evolving reality of nature, we might marvel as well at the laws that govern it: it was on this date in 1686, the publication of Newton’s Principia (the Philosophiae Naturalis Principia Mathematicawas arranged in London at the Royal Society. The minutes of the meeting record that the astronomer Edmond Halley would “undertake the business of looking after it and printing it at his own charge.”

Title page of the first edition



Written by LW

June 2, 2018 at 1:01 am

“Librarians are the secret masters of the world”*…


Interior view of the Manhattan Project’s Los Alamos scientific library

If library work was among the most tedious [at Los Alamos], the award for the most unenviable job likely belonged to its head librarian: Charlotte Serber, a University of Pennsylvania graduate, statistician, and freelance journalist who at one point interviewed Frank Lloyd Wright for The Boston Globe.

In 1942, J. Robert Oppenheimer selected Serber to spearhead the project in part because of her lack of librarian experience. He wanted someone who would be willing to bend the rules of cataloguing.

Her appointment was a victory for the women on the Hill. Though women were integral to the success of the Manhattan Project—scientists like Leona Woods and Mary Lucy Miller played central roles in the creation of the bomb—none occupied leadership positions.

In this respect, Serber stood alone. As the head of the scientific library, she became the Manhattan Project’s de facto keeper of secrets, a position that soon saw her targeted for an FBI probe—and almost ended in her being fired from the project…

The remarkable true tale of the woman who dodged accusations of communism, and made the atomic bomb possible: “The Librarian Who Guarded the Manhattan Project’s Secrets.”

* Spider Robinson


As we check it out, we might recall that it was on this date in 1687 that Philosophiæ Naturalis Principia Mathematica (Latin for Mathematical Principles of Natural Philosophy),  was published.  Often referred to as simply the Principia, the three-volume work outlines Newton’s laws of motion, forming the foundation of classical mechanics; Newton’s law of universal gravitation; and a derivation of Kepler’s laws of planetary motion (which Kepler first obtained empirically).  This first edition was written in Latin, the universal language of scholarship at the time; an English edition was published in 1728.  It remains one of the most important works in the history of science.

Title page of the first edition



Written by LW

July 5, 2017 at 1:01 am

“An artist never really finishes his work, he merely abandons it”*…


“Adam and Eve in Paradise: (c. 1527), Mabuse + “Bitch Don’t Kill My Vibe,” Kendrick Lamar

Banksy has lamented (in Wall and Piece) that…

Art is not like other culture because its success is not made by its audience. The public fill concert halls and cinemas every day, we read novels by the millions, and buy records by the billions. ‘We the people’ affect the making and quality of most of our culture, but not our art…. The Art we look at is made by only a select few. A small group create, promote, purchase, exhibit and decide the success of Art. Only a few hundred people in the world have any real say. When you go to an Art gallery you are simply a tourist looking at the trophy cabinet of a few millionaires…

Fly Art is taking Art back:

Fly Art was a project born out of boredom, frustration, and the internet.

Inspired by a lot of other projects with similar themes like Swoosh Art and Carter Family Portraits, Fly Art is the marriage of two of the finer things in life: Hip hop and art.

– Gisella and Toni


“The Last Kiss of Romeo and Juliet” (1823), Francisco Hayez + “All of The Lights,” Kanye West ft. Rihanna, Kid Cudi with vocals by Fergie, Charlie Wilson, John Legend, Tony Williams, Alicia Keys, La Roux, The Dream, Ryan Leslie, Alvin Fields and Ken Lewis.

More marvelous mash-ups at Fly Art.

[TotH to @mattiekahn]

* Paul Valery


As we hum along, we might recall that it was on this date in 1687 that (not yet Sir) Isaac Newton published Philosophiæ Naturalis Principia Mathematica (AKA “Mathematical Principles of Natural Philosophy”, AKA the Principia).  In three volumes Newton laid out his laws of motion (his foundation of classical mechanics), his theory of universal gravitation, and a derivation of Kepler’s laws of planetary motion (which Kepler had obtained empirically).

As G.E. Smith wrote in the Stanford Encyclopedia of Philosophy,

Viewed retrospectively, no work was more seminal in the development of modern physics and astronomy than Newton’s Principia… no one could deny that [out of the Principia] a science had emerged that, at least in certain respects, so far exceeded anything that had ever gone before that it stood alone as the ultimate exemplar of science generally.

Title page of Principia, first edition


Written by LW

July 5, 2014 at 1:01 am

Adventures in the Counterintuitive…

Your correspondent is headed away for a week or so, ranging more then ten times zones from home– the current limit to continuous timely posting of (R)D…  So, while regular service will resume on-or-around the 20th, a little something to keep one occupied:


Readers will recall that, on the occasion of an earlier hiatus, your correspondent wheeled out “the Monty Hall Problem” (c.f., “Riddle Me This” and “Birdbrains“).  This time, with thanks to Prof. Stan Wagon at Macalester College:

Monty Hall Takes a Vacation

Alice and Bob face three doors marked 1, 2, 3. Behind the doors are placed, randomly, a car, a key, and a goat. The couple wins the car if Bob finds the car and Alice finds the key.

First Bob (with Alice removed from the scene) will open a door; if the car is not behind it he can open a second door. If he fails to find the car, they lose. If he does find the car, then all doors are closed and Alice gets to open a door in the hope of finding the key and, if not, trying again with a second door.

Alice and Bob do not communicate except to make a plan beforehand. What is their best strategy?

Source: A. S. Landsberg (Physics, Claremont Colleges, California), Letters, Spring 2009 issue of The Mathematical Intelligencer.

The answer is here— and more nifty puzzles, here.

As we craft our own strategies, we might solve a memorial problem for Gabrielle-Émilie Le Tonnelier de Breteuil, Marquise du Châtelet, the French mathematician and physicist who is probably better known as Voltaire’s mistress; she died on this date in 1749.  Fascinated by the work of Newton and Leibniz, she dressed as a man to frequent the cafes where the scientific discussions of the time were held. Her major work was a translation of Newton’s Principia, for which Voltaire wrote the preface. The work was published a decade after her death, and was for many years the only translation of the Principia into French.

Judge me for my own merits, or lack of them, but do not look upon me as a mere appendage to this great general or that great scholar, this star that shines at the court of France or that famed author. I am in my own right a whole person, responsible to myself alone for all that I am, all that I say, all that I do. it may be that there are metaphysicians and philosophers whose learning is greater than mine, although I have not met them. Yet, they are but frail humans, too, and have their faults; so, when I add the sum total of my graces, I confess I am inferior to no one.
– Mme du Châtelet to Frederick the Great of Prussia


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