4th May 1936. 250th Anniversary of the Death of Otto von Guericke The death of the physicist Otto von Guericke 250 years ago. (1602-1686). Von Guericke was the Mayor of Magdeburg and the inventer of the air pump. Stamp valid until the 31st December 1937.
magdeburg nach der zerstörung | Magdeburg, Otto von Guericke-Festtage
Otto von Guericke (originally spelled Gericke, German pronunciation: [ˈɡeːʁɪkə]) (November 20, 1602 – May 11, 1686 (Julian calendar); November 30, 1602 – May 21, 1686 (Gregorian calendar)) was a German scientist, inventor, and politician. https://en.wikipedia.org/wiki/Otto_von_Guericke
CB15, a cholesteric liquid crystal used in the manufacturing of liquid crystal displays, at 100-times magnification. Image by Dr. Christian Bohley, Otto-von-Guericke-University of Magdeburg.
stamp Germany 153 pf. Otto von Guericke 1602-1686 stamps Germany postes timbre allemagne franciobollo selo sellos Germany Alemanha | Flickr - Photo Sharing!