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- Karpinski , L.C. 1915 . Robert of Chester's Latin Translation of the Algebra of al-Khowarizmi New York
- Savours , A. and McConnell , A. 1982 . The history of the Rossbank Observatory, Tasmania . Annals of Science , 39 : 527 – 564 . has photographs and descriptions of the Grubb magnetometers made for the various observatories. T. H. Levere, ‘Magnetic instruments in the Canadian Arctic Expeditions of Franklin, Lefroy and Nares’, Annals of Science, 43 (1986) pp. 57–76.
- 1840 . Report of the Committee of Physics and Meterology of the Royal Society relative to the Observations to be made on the Antarctic Expedition and in the Magnetic Observatories London
- Schmidlin , H. 1985 . “ Early gravimeter constructions ” . In Historical events and people in geosciences Edited by: Schröder , W. 91 – 98 . Frankfurt am Main and New York
- Sears , M. and Merriman , D. , eds. 1980 . Oceanography, the Past New York, Heidelberg and Berlin
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