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alſo Altitude Angle Arch Arithmetically becauſe called Caſe Center Chart Circle Co-fine common Compaſſes Complement conſequently conſtructed continued Courſe Days Declination Degrees Departure deſcribe Diff Difference of Latitude Difference of Longitude direct Diſtance failed divided Diviſion draw Earth Eaſt equal Equator Equinoctial Example fame Figure firſt former Geometrically give given half Hence Horizon Hour Index Inſtrument Length leſs Line Logarithm manner meaſured Meridian Method Miles muſt North Number Object Obſervation oppoſite Parallel Perpendicular Place Plane Plate Point Pole preceding Projection proper Proportion Quadrant Radius Remainder repreſent Right Right-angled Right-line Sailing ſame Secant Sect ſee ſet ſeveral ſhall ſhe Ship Side Sine Solution South Sphere Spherical ſubtracted Sun's ſuppoſed Table Take taken Tang Tangent Term Theorem theſe thoſe Triangle true Uſe Vane Weſt whence Zenith
Page 34 - Circumference of every Circle is fuppofed to be divided into 360 equal Parts, called Degrees ; and each Degree into 60 equal Parts, called Minutes ; and each Minute into 60 equal Parts, called Seconds, &c.
Page 28 - the Sum of the two Extremes will be equal to the Sum of any two Means-, that are equally diflant from the
Page 79 - the Sum of the Logarithms of any two Numbers is equal to the Logarithm of the Product of
Page 61 - the Surface of the Sphere, are called the Poles of the Circle. 3. A Spherical Angle is the Inclination of
Page 30 - Confequent ; fo is the Sum of all the Antecedents, to the Sum of all the
Page 73 - is to the Tangent of half their Difference, fo is the Tangent of half the vertical Angle, to the Tangent of the Angle which the Perpendicular CD makes with the Line CF
Page 90 - when the Sun is in this Circle the Days' and Nights are of an equal Length to all the Inhabitants of the Earth,
Page 29 - of the two Extremes will be equal to the Square of the Mean, As in thefe