The mariners compass compleated: part the second. Or the expert seaman's best guide. Containing ample specimens of the general table of the magnetical variations (or deviations) of the magnetick needle at places, ... By Z. Williams.
Williams, Zachariah,1673?-1755.
London : printed by J. Oliver, for the author; and sold by M. Cooper; J. Clarke; C. Corbet; and J. Millan,
1745.
ESTC