A new epitomy of the whole art of practical navigation : Containing the elements of plain trigonometry, and its application to plain, Mercator's and middle-latitude sailing. Together, with the most useful and necessary problems in astronomy. Also, the method of finding the variation of the compass, working an observation, the reason and use of the log-line, allowances for lee-way: with new tables of the sun's declination, &c. The second edition; with additions. By William Jones.