"The dot at the centre represents all the firepower of World War II. The other dots represent the firepower of existing nuclear weapons. The top right circle represents the weapons on one Poseidon submarine. It is equal to the power of three world wars." Bunge, 1988.
Cartographies of Time: A Visual History of the Timeline
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.