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electrostatic generator, a machine for generating high voltages developed between 1880 and 1883 by British inventor James Wimshurst (1832–1903).

Au moyen-age, un enfant qui voulait savoir l'heure devait avoir compris que c'était lui qui tournait autour du soleil et pas l'inverse, il devait avoir des notions d'astronomie. Au moyen-age, un enfant qui voulait savoir l'heure, devait avoir compris un peu, au moins un peu, quelle est sa place dans l'univers. #astrolab

Vintage Precision Micro-Projector by Flatters & Garnett | From a unique collection of antique and modern scientific instruments at http://www.1stdibs.com/furniture/more-furniture-collectibles/scientific-instruments/

Microscope, France, c. 1745- 1765


Nurnberg diptych sundial from 1600s capable of operating between 42 and 54 degrees of latitude. The brass insert is a mystery: Possibly an annalematic sundial to allow orientation without compass. Currently in Louvre.

Powell and Lealand, The No.1 monocular microscope dated 1908

Spherical astrolabe (15th C.). One point which distinguishes Star Map from the astrolabe is that in both cases, astrolabes were not meant for direct viewing. In other words, one could not do real time work. It would require measurement, enscribing, and a duration of labor, etc. Worth mentioning, the spherical astrolabe did not have a viewing instrument, like the planispheric versions did. This made the planispheric require less work and fewer hours of it in order to chart information.

Old devices : #electrostatics, induction machines, Van de Graaff generator.

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