Practical navigation: or An introduction to the whole art : Containing the doctrine of plain and spherical triangles. Plain, mercator, great circle sailing; and astronomical problems. The use of divers instruments; as also of the plain chart, mercator's chart, and both globes. Sundry useful tables in navigation: and a table of 10000 logarithms, and of the logarithm sines, tangents, and secants. All carefully corrected. By John Seller, hydrographer to the king. - Seller, John (Printed by S. Powell, at the sign of the printing-press in Copper-Alley, near the Blind-Key, for G. Grierson, bookseller, at the Two Bibles in Essex-street, 1714)