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Archive for the ‘Nature’ Category

Whirlpool Galaxy

Swiss mathematician Jacob Bernoulli (b.1654, d.1705) greatly admired the logarithmic spiral, found widely in nature, because in his opinion it “may be used as a symbol, either of fortitude and constancy in adversity, or of the human body, which after all its changes, even after death, will be restored to its exact and perfect self.” He called it Spira mirabilis – “the marvelous spiral.”

Bernoulli picked out the perfect spiral to be engraved on his gravestone along with the motto Eadem mutata resurgo (“Changed and yet the same, I rise again”).

Mechanism of a scroll pump

Hahaha. What he got instead was an Archimedean spiral, which is totally not the same thing at all.

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One Two!

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Congratulations to everyone at NASA, the Jet Propulsion Laboratory and all the other people who worked on the project and believed in it.

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Portrait of Louis Jordan, Paramount Theater(?), New York, N.Y., ca. July 1946. William P. Gottlieb,photographer.

The Library of Congress is now on Flickr!

Thanks for the tip, The Online Photographer!

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Theodor Horydczak Collection (Library of Congress)

When the day changed and the mad wind died down,
The powdery drifts that all day long had blown
Across the meadows and the open fields,
Or whirled like diamond dust in the bright sun,
Settled to rest, and for a tranquil hour
The lengthening bluish shadows on the snow
Stole down the orchard slope, and a rose light
Flooded the earth with beauty and with peace.
Then in the west behind the cedars black
The sinking sun stained red the winter dusk
With sullen flare upon the snowy ridge,–
As in a masterpiece by Hokusai,
Where on a background gray, with flaming breath
A scarlet dragon dies in dusky gold.

~ William Bliss Carman (1861-1929)

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