Astronomical calendar, by Nicholas of Lynn, ca. 1324 / Sacred Geometry <3

Astronomical calendar, by Nicholas of Lynn, ca. 1324 / Sacred Geometry sure wish I understood all this stuff.

Cartographies of Time: A Visual History of the Timeline | Brain Pickings Discus chronologicus by German engraver Christoph Weigel, published in the early 1720s, is a paper chart with a pivoting central arm. Rings represent kingdoms, radial wedges represent centuries, and the names of kingdoms are printed on the moveable arm.

Cartographies of Time: A Visual History of the Timeline

Discus chronologicus by German engraver Christoph Weigel, published in the early is a paper chart with a pivoting central arm. Rings represent kingdoms, radial wedges represent centuries, and the names of kingdoms are printed on the moveable arm.

“This work helps chart, with numerous volvelles, the movements of the heavenly bodies by the methods of Regiomontanus. Published soon after the papal bull of 1586 forbidding astrology, Gallucci nonetheless asserts the importance of the rational, scientific investigation of the heavens.”     Giovanni Paolo Gallucci, Speculum Uranicum, Venice: Damianus Zenarus, 1593

the-rx: “ “This work helps chart, with numerous volvelles, the movements of the heavenly bodies by the methods of Regiomontanus. Published soon after the papal bull of 1586 forbidding astrology, Gallucci nonetheless asserts the importance of the.

Instrument-maker Gemma Frisius devised a volvelle for inclusion in Peter Apianus' 1524, Cosmographia

Instrument-maker Gemma Frisius devised a volvelle for inclusion in Peter Apianus' Cosmographia

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This 1933 nail gauge had a "loop" at the top so that it could be hung in the nail section of a hardware store.

Smith Chart slide rule

Slide Rules, Nomographs, and Calculators

Ad Astra's Myspace Profile. According to Rick Thompson (tytoalba on Flickr), he has 'always been fascinated by volvelles, or the information wheels used to organize information in an interactive way'.  He 'wanted to use one to break out of the usual grid/table format of myspace profiles'. He 'combined the volvelle idea with an orrery...and came up with this' (view www.myspace.com/tytoalba)

I am not sure what this is but it makes me think of star charts and maritime navigation

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