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Contributions to Terrestrial Magnetism presents a detailed study of compass variation based on observations made within the United States Naval Service from 1881 to 1894. Authored by the United States Hydrographic Office and Chauncey Thomas, this historical record provides valuable insights into the challenges and techniques of navigation during this period. The book offers a comprehensive analysis of terrestrial magnetism, crucial for accurate seafaring and charting. This volume serves as a primary source for understanding the development of navigational science and the role of the U.S. Navy in advancing hydrographic surveying. It will be of interest to historians of science, maritime scholars, and anyone fascinated by the history of navigation and cartography.
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