The mariners magazine, or, Sturmy's mathematical and practical arts containing the description and use of the scale of scales, it being a mathematical ruler, that resolves most mathematical conclusions, and likewise the making and use of the crostaff, quadrant, and the quadrat, nocturnals, and other most useful instruments for all artists and navigators : the art of navigation, resolved geometrically, instrumentally, and by calculation, and by that late excellent invention of logarithms, in the three principal kinds of sailing : with new tables of the longitude and latitude of the most eminent places ... : together with a discourse of the practick part of navigation ..., a new way of surveying land ..., the art of gauging all sorts of vessels ..., the art of dialling by a gnomical scale ... : whereunto is annexed, an abridgment of the penalties and forfeitures, by acts of parliaments appointed, relating to the customs and navigation : also a compendium of fortification, both geometrically and instrumentally / by Capt. Samuel Sturmy.

The Fourth Scituation.

The first Latitude is at L Lundy 51 deg. 22 min. Difference of Longitude counted from E 52 deg. 55 min. that Meridian will cut the Latitude of Barbadoes 13 deg. 10 min. at b: M ♓ the Measure of the Angle of Direct Position 67 deg. 51 min. and b L measured in that Meridian is 57 deg. 00 min. the Distance. Now to know the Angle of Position from Barbadoes, being Westward from Lundy, set it on the West side of the Figure, as at B; and likewise if the first Place be to the Eastward, put his Latitude to the East side of the Meridian.

Now to know the Angle of Position from Barbadoes, and Distance, and Obliquity, B □ O is the Arch of the Great Circle that passeth over these two Places; □ is Lundy, q h is the Measure of the Angle of Position 36 deg. 26 min. B □ measured in that

Line, you will find the Distance 57 deg. O is the greatest Obliquity 54 deg. 40 min. NO ☉ S a Meridian of the greatest Obliquity: d is the Intersection with the Aequator.