The Chronometer's Companion: Or Perpetual Solar Almanac is a book written by James Griffin in 1839. The book is a comprehensive guide to the use of chronometers and the calculation of solar time. It includes detailed explanations of the principles of chronometry, as well as instructions for using chronometers to determine longitude at sea. The book also contains a perpetual solar almanac, which provides information on the positions of the sun, moon,...
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