A discovrse mathematical on the variation of the magneticall needle
Subtitle: together with its admirable diminution lately discovered
By: by Henry Gellibrand.
Series: Landmarks of science II
Publisher: W. Jones
Published: 1635
Place of publication: London
Language: eng
Format: Microform
Number of pages: 22
Subjects: Geomagnetism.
Notes: Microfiche. New York, N.Y. Readex Microprint Corporation, [1985?] (Landmarks II)