On the Means Adopted in the British Colonial Magnetic Observatories, for Determining the Absolute Values, Secular Change, and Annual Variation of the Terrestrial Magnetic Force.

London: Taylor, 1850. unbound. From the Philosophical Transactions - Part I. for 1850. 19pp. (pp. 201- 219). 4to, orig. wrs.; uncut; (spine unsewn). London, 1850. Very good.

Price: $75.00

Item #116033

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