NAVIGATION.
Seller, John, fl. 1700.
Practical navigation or an Introduction to the whole art, containing many useful geometri- cal definitons and problems; the doctrine of plain and spherical triangles; plain, mercator, and great-circle sailing; sundry useful problems in astronomy; the use of instruments ... useful tables of the moon's age, of the tides, of the sun's place ... Also a table of 10000 logarithms, and of the logarithm sines, tangents and secants. All carefully corrected with many useful ad-
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