An epitome of navigation [microform] : containing problems geometrical, the doctrine of plain and spherical triangles, and their application in plain, mercator and great circle sailing : as also in astronomy and geography, and rules for finding the variation of the compass, and correcting the course : together with the tables of the sun and stars right ascension and declination : of the latitude and longitude of places of meridional parts : likewise a traverse-table, a perpetual almanack, and other things very useful in the art of navigation : and the logarithmical sines and tangents, with the logarithms and natural numbers from 1 to 10 000, according to these exact tables formerly set forth / by Henry Gellibrand ...