Magnetical instructions for the use of portable instruments adapted for magnetical suverys and portable observatories, and for the use of a set of small instruments adapted for a fixed magnetical observatory
Contributors: Great Britain. Admiralty
Publisher: Printed by W. Clowes and sons, for H. M. Stationery off.
Published: 1844
Place of publication: London
Language: eng
Number of pages: 146
Subjects: Geomagnetism; Observers' manuals