Practical navigation; or, An introduction to the whole art. : Containing many useful geometrical definitions and problems; the doctrine of plain and spherical triangles; plain Mercator, and great-circle-sailing; sundry useful problems in astronomy; the use of instruments; the azimuth-compass; ring-dyal; variation compass; the fore-staff, quadrant, plough, and nocturnal; the plain scale, Gunter's scale, sinical quadrant; plain chart; Mercator's-chart; both globes; the inclinatory-needle, and virtues of the load-stone; useful tables of the moon's age, of the tides, of the sun's place, declination, and right-ascension; of the stars right-ascension and declination; the latitude and longitude of places; and a table of meridional parts; likewise a new traverse-table, and the use thereof in keeping a reckoning at sea: also a table of 10000 logarithms, and of the log, sines, tangents and secants. (1680)

Seller, John, active 1658-1698 · London : Printed by J. Darby, and are to be sold by the author at the Hermitage in Wapping, by W. Fisher at the Postern-gate near Tower-Hill, by R. Boulter at the Turks-Head in Cornhil, by T. Passenger at the three Bibles on London-Bridg, and R. Smith, at the Bible in Cornhil · leaf 20

An illustration from Practical navigation; or, An introduction to the whole art. : Containing many useful geometrical definitions and problems; the doctrine of plain and spherical triangles; plain Mercator, and great-circle-sailing; sundry useful problems in astronomy; the use of instruments; the azimuth-compass; ring-dyal; variation compass; the fore-staff, quadrant, plough, and nocturnal; the plain scale, Gunter's scale, sinical quadrant; plain chart; Mercator's-chart; both globes; the inclinatory-needle, and virtues of the load-stone; useful tables of the moon's age, of the tides, of the sun's place, declination, and right-ascension; of the stars right-ascension and declination; the latitude and longitude of places; and a table of meridional parts; likewise a new traverse-table, and the use thereof in keeping a reckoning at sea: also a table of 10000 logarithms, and of the log, sines, tangents and secants., 1680, leaf 20 — 4 Geometrical Definitions, d) : eps A RIGHT-ANGLE, is when a right Line: ftanding upon a Right Line, makes the Angles on each fide equal to each others as the right B Angles ACD, and BCD. G -pR- An Oblique- Angle; is, either Acute, or ECO ea tts ee An Acute-Angle, is lefs than a Right, as… … MA Triangle, is a three fided Figure, and is oO: fide- -_red either in refpect of its Sides or Angles, = _ In refpect of, its Sides, "tis either, eae Equilateral, having three equal Sides, as.A. + a“ Or Equicrural, having two equal Sides, as B. RR RP SS NN PRS ae ee ro NN ea

Navigation · Navigation -- Tables · Logarithms · Imprint 1680

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More pictures from Practical navigation; or, An introduction to the whole art. : Containing many useful geometrical definitions and problems; the doctrine of plain and spherical triangles; plain Mercator, and great-circle-sailing; sundry useful problems in astronomy; the use of instruments; the azimuth-compass; ring-dyal; variation compass; the fore-staff, quadrant, plough, and nocturnal; the plain scale, Gunter's scale, sinical quadrant; plain chart; Mercator's-chart; both globes; the inclinatory-needle, and virtues of the load-stone; useful tables of the moon's age, of the tides, of the sun's place, declination, and right-ascension; of the stars right-ascension and declination; the latitude and longitude of places; and a table of meridional parts; likewise a new traverse-table, and the use thereof in keeping a reckoning at sea: also a table of 10000 logarithms, and of the log, sines, tangents and secants.

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