An appendix to the directions for seamen, bound for far voyages

Whereas it may be of good use, both naval and philosophical, to know, both how to sound depths of the sea without a line, and to fetch up water from any depth of the same; the following waies have been contrived by Mr. Hook to perform both; (which should have been added to the lately printed Directions for seamen, if then it could have been conveniently done.)