This page has been validated.
(433)
Num. 24.
PHILOSOPHICAL
TRANSACTIONS.
Munday, April 8. 1667
The Contents.
Directions for Observations and Experiments to be made by Masters of Ships, Piliots, and other fit persons in their Sea-Voyages; printed with Enlargements and Explications of what was formerly publisht of this Kind; suggested partly by Sir. R. Moray, partly by Mr. Hook; as, the several wayes of Observing, both at Sea and Land, the Declinations and Variations of the Needle: Some ways of knowing the different Gravities of Sea-water: A Form of a Scheme, representing at one view, to the eye, Observations of the Weather for a whole Month, &c.
DIRECTIONS
For Observations and Experiments to be made by Masters of Ships, Piliots, and other fit persons in their Sea-Voyages.
THough the Art of Navigation, one of the most useful in the
World, be of late vastly improved, yet remain their many things to be known and done, the knowledg and performance whereof, would tend to the accomplishment of it: As the making of exact Mapps of all Coasts, Ports, Harbors, Bayes, Promontories, Islands, with their several Prospects and Bearings; Describing of Tydes, Depths, Currents, and other things considerable in the Seas: Turnings, Passages, Creeks, Sands, Shelves,
Rocks, and other dangers: Nice Observations of the Variations
Lll
and
