For #ArtAdventCalendar Day 3, a new scientist portrait: my #linocut of ancient Chinese Han Dynasty #polymath & statesman Zhang Heng (78-139) who invented a seismoscope (a simplified seismometer which doesn’t record earth motions) to detect distant earthquakes & indicate their direction, 2000 years ago! Here with a reconstruction of his seismoscope, schematic of how it might have worked & horizontal earthquake surface waves (Rayleigh waves in particular).

#histSci #printmaking #sciart 🧵1/n