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IX.—On the Balance Magnetometer, and its Temperature Corrections

Published online by Cambridge University Press:  17 January 2013

J. A. Broun Esq.
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Extract

The Balance Magnetometer was imagined by Dr H. Lloyd, of Dublin, for the purpose of observing the variations of the vertical component of the earth's magnetic intensity. It consists simply of a balanced magnetic needle, with a knife-edged axle, resting on agate planes, at right angles to the plane of the magnetic meridian. In the instrument from which the results in this paper are deduced, the position of the needle is observed by means of micrometer microscopes.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 16 , Issue 1 , 1845 , pp. 67 - 78
Copyright
Copyright © Royal Society of Edinburgh 1845

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References

page 67 note * See the Introduction to the Makerstoun Magnetical Observations for 1841–2.

page 67 note † In his “Account of the Magnetical Observatory of Dublin,” where the complete investigation will be found.

page 72 note * The time of vibration throughout the year varies from other causes. The law which regulates these variations I have not yet determined.