A description of the orthochronograph, or altitude and meridian instrument
Subtitle: with plain instructions for the method of using it in the correction of time-keepers
By: by Sumner Smith
Publisher: S. Folsom, printer
Published: 1846
Place of publication: Hartford [Conn.]
Language: eng
Number of pages: 12
Subjects: Chronometers
Other titles: Description of the construction and use of Smith's orthochronograph