EditorialHenry Segerman, a British American mathematician and inventor at Oklahoma State University, demonstrates his Kinetic Cyclic Scissors grid at his home in Stillwater, Okla., Dec. 3, 2022. (Brett Deering/The New York Times)
EditorialLantern Slide - Tangyes Ltd, Cyclic Chart, circa 1910, One of 239 glass lantern slides depicting products manufactured by Tangyes Limited engineers of Birmingham, England. The images include various products such as engines, centrifugal pumps, hydrauli...
EditorialApollo, Diana, and Time with the Cyclic Vicissitudes of Human Life. Dated: c. 1561. Dimensions: sheet: 15.7 x 22.9 cm (6 3/16 x 9 in.) support: 20.8 x 28.1 cm (8 3/16 x 11 1/16 in.). Medium: pen and brown ink with gray wash over traces of graphite, in...
EditorialApollo, Diana, and Time with the Cyclic Vicissitudes of Human Life. Dated: c. 1561. Dimensions: sheet: 15.7 x 22.9 cm (6 3/16 x 9 in.) support: 20.8 x 28.1 cm (8 3/16 x 11 1/16 in.). Medium: pen and brown ink with gray wash over traces of graphite, in...