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I. On the Investigation of Magnetic Intensity by the Oscillations of the Horizontal Needle

Published online by Cambridge University Press:  17 January 2013

W. Snow Harris Esq.
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Extract

The many irregularities to which the vibrations of the horizontal needle are subject, renders the usual method of investigating the terrestrial magnetic intensity, although precise in theory, occasionally uncertain in practice. It has been my endeavour in the following paper, to consider in some measure the most prominent of the causes of these irregularities, with a view of arriving at certain practical deductions, by means of which they may be either greatly palliated, or otherwise avoided.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 13 , Issue 1 , 1835 , pp. 1 - 24
Copyright
Copyright © Royal Society of Edinburgh 1835

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References

page 3 note * I have to acknowledge the obligation I am under to my friend Colonel Hamilton Smith, for a long use of this valuable instrument.

page 4 note * Trans. Royal Society for 1881, p. 69.

page 12 note * Lond. and Edin. Journal of Science for October 1832.

page 13 note * Transactions of the Royal Society for 1825.

page 15 note * Annals of Philosophy, Vol. IX. N, S.

page 24 note * I am much indebted to Mr Cox, maker of Philosophical apparatus at Devonport, for his valuable assistance in the construction of the Instruments described in this Paper.