Description of the transit circle of the United States Naval Observatory
Subtitle: with an investigation of its constants
By: by Simon Newcomb.
Series: CIHM/ICMH Microfiche series = CIHM/ICMH collection de microfiches -- no. 11927; CIHM/ICMH microfiche series -- no. 11927
Publisher: G.P.O.
Published: 1867
Place of publication: Washington
Language: eng
Format: Microform
Number of pages: 40
Subjects: Astronomical instruments.; Astronomie -- Instruments.