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.

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Title
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.
Author
Sturmy, Samuel, 1633-1669.
Publication
London :: Printed by E. Cotes for G. Hurlock, W. Fisher, E. Thomas, and D. Page ...,
1669.
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"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." In the digital collection Early English Books Online 2. https://name.umdl.umich.edu/A61915.0001.001. University of Michigan Library Digital Collections. Accessed June 7, 2024.

Pages

RULE III.

As Radius, To Co-tangent of Obliquity 54 deg. 40 min. 1985059
Take from it the Co-sine of Differ. of Long. from Obliq. 30 d. 00 993753
There remains the Co-tangent of the Latitude 50 deg. 41 min. 991306

And by the same Rule I made this

Differ. of Longit from Obliq. Lundy Latitude from Lundy.  
Deg. Min. Deg. Min.  
27 32 51 22  
30 00 50 41  
35 00 49 07  
40 00 47 13  
45 00 44 56  
50 00 42 12  
55 00 38 58  
60 00 35 12  
65 00 30 48  
70 00 25 46  
75 00 20 03  
80 27 13 10 Barbadoes.

Table, of an Arch of a Great Circle, ex∣tended from Latitude 51 deg. 22 min. to Latitude 13 deg. 10 min. Difference of Longitude 52 deg. 55 min. setting the Point of the greatest Obliquity upon a Meridian-line, that so it might be the better protracted on Mercator's Chart: This is, for every 15 deg. Difference of Longitude, these are the Latitudes the Great Circle will pass through; so that you see there is 52 deg. 55 min. added by 5 to the Difference of Longitude of the first Place from the Meridian of Ob∣liquity, which makes 80 deg. 27 min. the Difference of Obliquity of the second Place, which was the Difference of Longitude from Obliquity at first found. In like manner work for any other Place.

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