36 research outputs found

    Lodestone and earth: the study of magnetism and terrestrial magnetism in Great Britain, c 1750-1830

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    This dissertation investigates a neglected area in the history of the physical sciences--the history of the study of magnetism. Examining the study of magnetism and terrestrial magnetism in Great Britain from the 1750s to the 1830s allows for discussing the changing motives, methods, and results of magnetic and geomagnetic studies. The changes in magnetic studies are comparable to dramatic transformations in other areas of experimental physics, including the studies of heat, light, and electricity;With the publication of De Magnete, William Gilbert intimately linked the earth\u27s magnetism to magnetism by arguing the earth was a giant magnet. Though subsequent Cartesian theories assumed the circulation of a material magnetic fluid, they retained the Gilbertian notion that the earth and ordinary magnets had the same causes. Because the analogy persisted into the nineteenth century, theories of magnetism and terrestrial magnetism were frequently discussed together;The impetus for collecting geomagnetic data changed between 1750 and 1835. Around 1800, the discovery of ship magnetism lent important practical reasons for understanding magnetism. As well, magnetic collecting took on new importance with renewed Arctic exploration in 1818. Tracing the changing motives behind and methods of collecting magnetic data reveals its shifting practical, scientific, and symbolic importance;Mystery and confusion surrounded the study of magnetism from 1750 to 1790. While important, the study of magnetism was much less studied than electricity. Though most endorsed circulating fluid theories, there was little consensus regarding the causes of terrestrial magnetism. In the meantime, many speculated that unifying principles, such as Newton\u27s ether, linked all phenomena together;From 1780 to 1820, mathematical and quantitative imponderable fluid theories of Aepinus and Coulomb displaced the qualitative circulating fluid theories. In Britain, John Robison and several others made known Aepinian theory. Scottish methodology and Laplacian science played vital roles in changing the face of British experimental physics;Between 1820 and 1840, magnetic theories changed with the discovery of electromagnetism and subsequent flood of experimentation. Challenges to Laplacian orthodoxy supposed that magnetism, electricity, heat, light, chemical action, and rotation were intimately connected. Meanwhile, the Humboldtian-cosmical approach altered the understanding of geomagnetism as well

    History of Cumberland County Maine

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    A study of European art and related ideas in contact with the Pacific 1768-1850

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    3v. : plsThe central ideas presented in this study together with most of the work concerned with individual writers and artists have arisen directly from research and reflection upon the primary sources examined. Indebtedness either in the matter of argument or fact has been acknowledged appropriately in the footnotes. Even so it is a pleasant duty to acknowledge that Dr. K. Badt’s John Constable's Clouds , Dr. O. Pacht's 'Early Italian Nature Studies’, and Dr. E. Wind’s ’The Revolution in History Painting' have been found most suggestive and are, in a sense, germinal to the central argument of the study. It will be obvious that it also owes much to Professor A. 0. Lovejoy’s studies in the history of ideas. (First paragraph of Preface)

    Picturesque atlas of Australasia

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    What oh tonight : the methodology factor and pre-1930s' Australian variety theatre (with special focus on the one act musical comedy, 1914-1920)

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    The Aldine history of Queensland

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    Written as a celebration of the centennial year of the settlement of Australia and includes chapters on Australian and Queensland history from the exploration of Australia through to the different districts of the colony of Queensland in 1888. It contains information on the different governors, the national constitution, interior exploration, resources, religious work, education, recreation, and a large biographical section. It also includes over 500 illustrations of people and places along with several map

    Annual Report of the Board of Regents of the Smithsonian Institution, showing the operations, expenditures, and condition of the institution for the year 1881.

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    Annual Report of the Smithsonian Institution. 16 May. SMD 109,47-1, v2, 839p. [1994) Research related to the American Indian; Indian bread; Indian remains in Georgia and Illinois

    Queensland government gazette

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