He also invented the Pfund telescope, which is a method for achieving a fixed telescope focal point regardless of where the telescope line of sight is positioned, and the Pfund sky compass, which arose from Pfund's studies of the polarization of scattered light from the sky in 1944, and which greatly helped transpolar flights by allowing the determination of the Sun's direction in twilight.
Herman Melville | August Strindberg | Woody Herman | August | Herman's Hermits | Papal conclave, August 1978 | Herman Wouk | Stanisław August Poniatowski | Herman Hollerith | Edward S. Herman | August Derleth | Pernilla August | Herman Daly | Herman Van Rompuy | August Macke | Herman Dune | Herman Brood | Gottfried August Bürger | August Wilson | August von Mackensen | August Sander | August Heckscher | Herman Willem Daendels | Herman Gorter | Herman Finck | Herman Boerhaave | Herman | Georg August Schweinfurth | August Spies | August Neidhardt von Gneisenau |