Sidereal clock and mean solar clock combined
Subtitle: system: Strkömgren and Olsen
Contributors: Olsen, Jens
Publisher: Cornelius Knudsen, Nautical Department
Published: 1917
Place of publication: Copenhagen
Language: eng
Number of pages: 14
Subjects: Astronomical clocks; Clocks and watches
Notes: "The clock constructed by Professor Elis Strkömgren and Engineer Jens Olsen which shows sidereal time and mean time at the same instant, is of extreme value for anybody engaged in determining time and place, consequently for astronomers, geodesians, and seamen"--Introduction.