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Discussion of the Magnetic and Meteorological Observations, Vol. 1: Made at the Girard College Observatory, Philadelphia, in 1840, 1841, 1842, 1843, ... Amplitude of the Solar Diurnal Variation an - Softcover
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Excerpt from Discussion of the Magnetic and Meteorological Observations, Vol. 1: Made at the Girard College Observatory, Philadelphia, in 1840, 1841, 1842, 1843, 1844, and 1845; Investigation of the Eleven Year Period in the Amplitude of the Solar Diurnal Variation and of the Disturbances of the Magnetic Declination
It is proposed in the present paper to investigate the law of the eleven year period, or as it is more frequently called, the decennial period, there being yet an uncertainty as to its precise length. It is supposed to have some direct or_ indirect connection with the solar spot period, which, according to late investigations by Prof. R. Wolf,2 is said to exhibit corresponding disturbances.
The discussion is a contribution towards the determination of the epoch of the occurrence of a minimum (as to number and magnitude) in certain phases of the magnetic variations and disturbances, corresponding to a minimum in the solar spot period. The method of reduction is substantially the same as that adopted by General Sabine, and explained in his discussion of the Toronto and Hobarton3 observations.
This longitude depends on that of Cambridge observatory, for which 411 44 has been adopted.
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Discussion of the Magnetic and Meteorological Observations, Vol. 1
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Paperback. Zustand: New. Print on Demand. In the mid-19th century, a group of scientists worked tirelessly to establish the Girard College magnetic observatory in Philadelphia, aiming to better understand the Earth's magnetic fields. This book is an exploration of the series of magnetic and meteorological observations made at Girard College between 1840 and 1845, a period that significantly contributed to the emerging field of geomagnetism. The author takes the reader through the process of analysing the solar diurnal variation in the magnetic declination, its amplitude, and the disturbances to which it was subjected. The author examines the eleven-year period in the change of the amplitude of magnetic variation and establishes a precise epoch for the occurrence of its minimum. The author concludes by examining the annual and diurnal inequality of disturbances in the magnetic declination, finding both positive and negative disturbances tend to balance each other out by the end of the day. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Bestandsnummer des Verkäufers 9781334033346_0
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Discussion of the Magnetic and Meteorological Observations, Vol 1 Made at the Girard College Observatory, Philadelphia, in 1840, 1841, 1842, 1843, Amplitude of the Solar Diurnal Variation an
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Discussion of the Magnetic and Meteorological Observations, Vol 1 Made at the Girard College Observatory, Philadelphia, in 1840, 1841, 1842, 1843, Amplitude of the Solar Diurnal Variation an
Anbieter: PBShop.store UK, Fairford, GLOS, Vereinigtes Königreich
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PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000. Bestandsnummer des Verkäufers LW-9781334033346
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