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.

About this Item

Title

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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Link to this Item

http://name.umdl.umich.edu/A61915.0001.001

Cite this Item

"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 15, 2024.

Pages

EXAMPLE II. The Ʋse of the Table.

On the 17th of September in the same Year, I desire to know the Declination that day at Noon at Bantam. The Declination for the Meridian of London is that Day 1 deg. 52 min. and the Difference of the Declination of the Day following is 24 min. decreased; and, as was said before in the last E••••mple, the difference of Longitude is 110 deg. Therefore I look in the Head of the foregoing Table, for the nearest Num∣ber to the Difference 24, and find it to fall just even on the Head of the last Column; then look on the left hand of the Table for the Difference of Longitude, and I find 105 deg. nearest, and in the Common Angle of Meeting I find 7, which is to be substracted from the Declination in the Meridian of London abovesaid, 1 deg. 52 min. and the Remainder will be the Declination for the Meridian or Longitude I am in, which is 1 deg. 45 min. South: But if the Declination decreaseth, as it doth here in∣crease, then you must have added.

	deg.	min.
In the Meridian of London the Declination	01	52
The Minutes Proportional substracted	00	07
The Declination for 110 deg. Longitude of Bantam, East	01	45
The Declination of 110 deg. West of the Meridian of London	00	07
West	01	52