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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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