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The seaman's tutor, explaining geometry, cosmography, and trigonometry : with requisite tables of longitude and latitude of sea-ports, traverse tables, tables of easting and westing, meridian miles, declinarions, amplitudes, refractions, use of the compass , kalendar, measure of the earth's globe, use of instruments and charts, difference of sailing, estimation of a ship's way by the log, and log-line, currents, & c. : compiled for the use of the mathematical school in Christ's hospital-London, His Majesty Charles II, his royal foundation (1682)

Perkins, Peter · London : Obadiah Blageave · leaf 20

An illustration from The seaman's tutor, explaining geometry, cosmography, and trigonometry : with requisite tables of longitude and latitude of sea-ports, traverse tables, tables of easting and westing, meridian miles, declinarions, amplitudes, refractions, use of the compass , kalendar, measure of the earth's globe, use of instruments and charts, difference of sailing, estimation of a ship's way by the log, and log-line, currents, & c. : compiled for the use of the mathematical school in Christ's hospital-London, His Majesty Charles II, his royal foundation, 1682, leaf 20
r Arch F in F, and draw A F, which wil divide the Angle, as was required. The poim l is called a point of Interfcftion. . 8. Jo divide the Circumference of a Circle into eight equal parts. Firft, draw the Diameter A C, then with the Convpalies opened to any extern fo it fv. ceed half AC, fet one… … . • . „ foot in F, with he other crofs the Arch L, and laying a Rui ArX" L' r”J point F> wherc 'he tw€ Arches mterfeft make a mark on the circum¬ ference at K, fo is A K or K F the • part of the Circumference. * . 9' div]de the Circumference of a Circle m to thirty two equal parts. jrjr$

Navigation -- Early works to 1800 · Imprint 1682

Internet Archive · John Carter Brown Library · Public domain (published before 1931). Free to use for anything.

More pictures from The seaman's tutor, explaining geometry, cosmography, and trigonometry : with requisite tables of longitude and latitude of sea-ports, traverse tables, tables of easting and westing, meridian miles, declinarions, amplitudes, refractions, use of the compass , kalendar, measure of the earth's globe, use of instruments and charts, difference of sailing, estimation of a ship's way by the log, and log-line, currents, & c. : compiled for the use of the mathematical school in Christ's hospital-London, His Majesty Charles II, his royal foundation

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