A discourse mathematical on the variation of the magneticall needle
Subtitle: Together with its admirable diminution lately discovered. By Henry Gellibrand professor of astronomie in Gresham College.
Series: Early English books, 1475-1640 -- 1237:5.
Publisher: Printed by William Iones, dwelling in Red-crosse-street
Published: 1635
Place of publication: London
Language: eng
Format: Microform
Number of pages: 22
Subjects: Geomagnetism -- Early works to 1800.
Genres: Early works to 1800.
Notes: Reproduction of the original in the Bodleian Library.

STC (2nd ed.) 11712.

Available electronically as part of Early English books online.

Microfilm. Ann Arbor, Mich. : UMI, 1971. 1 microfilm reel ; 35 mm. (Early English books, 1475-1640 ; 1237:05).