The longitude at sea, not to be found by firing guns. Billingsley, Case, fl. 1714.
*XDefoe The longitude at sea, not to be found by fir-
ing guns, nor by the most curious spring-clocks or watches. But the only true method for discover- ing that valuable secret by the sun, moon or stars, and an exact time-keeper, with such nec- essary improvements, as have not yet been des- erib'd by any other person; and (with respect to the term of any ordinary voyage) may properly be call'd a perpetual motion. ... By Case Billings- ley.
(Continued on next card) MB