Navigatio britannica: or, A complete system of navigation in all its branches, both with regard to theory and practice ...

W. and J. Mount and T. Page, 1750 - Navigation - 423 pages

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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 73 - it will be, as the Co-tangent of half the Sum of the Angles at the Bafe, 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 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
Page 92 - Longitude of any Place upon the Earth, is an Arch of the Equator intercepted between the firft Meridian, and the Meridian