Observations on days of unusual magnetic disturbance, made at the British colonial magnetic observatories, under the departments of the ordnance and admiralty.
Subtitle: Printed by the British government under the superintendence of Lieut.-Colonel Edward Sabine ...
Contributors: Younghusband, Charles Wright, 1821-1899
Publisher: H.M. Stationery off.
Published: 1843
Place of publication: London
Subjects: Geomagnetism -- Diurnal variation