A treatise on navigation, and nautical astronomy |
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Page 104
... equator . Thus opposite 40 ° on the line of chords stands nearly 54 on the line M. LoN .; which denotes that on the parallel of 40 ° , 54 miles correspond to a degree of longitude . The other parts of this side of the scale are ...
... equator . Thus opposite 40 ° on the line of chords stands nearly 54 on the line M. LoN .; which denotes that on the parallel of 40 ° , 54 miles correspond to a degree of longitude . The other parts of this side of the scale are ...
Page 105
... equator , according to Mercator's projection of the globe , in which projection the meridians are all parallel lines . The line below it , marked E. parts , or equal parts , shews the parts of the meridian , whose projection is shewn in ...
... equator , according to Mercator's projection of the globe , in which projection the meridians are all parallel lines . The line below it , marked E. parts , or equal parts , shews the parts of the meridian , whose projection is shewn in ...
Page 106
... equator and the parallels of latitude , and the line of Mer . parts to project the meridians ; but the lines are too small to be of much use in the practice of drawing charts . The lines on the scale afford a ready method of obtaining ...
... equator and the parallels of latitude , and the line of Mer . parts to project the meridians ; but the lines are too small to be of much use in the practice of drawing charts . The lines on the scale afford a ready method of obtaining ...
Page 147
... equator , the equinoctial , or the line ; and less circles , whose planes are parallel to the plane of the equator , are called parallels of latitude . The meridian passing over any place is called the meridian of that place ; and the ...
... equator , the equinoctial , or the line ; and less circles , whose planes are parallel to the plane of the equator , are called parallels of latitude . The meridian passing over any place is called the meridian of that place ; and the ...
Page 148
... equator , is called the tropic of cancer ; and that which is 23 ° 28 ′ south of the equator is called the tropic of capricorn . The parallel of latitude , which is 23 ° 28 ′ from the north pole , is called the arctic circle ; and that ...
... equator , is called the tropic of cancer ; and that which is 23 ° 28 ′ south of the equator is called the tropic of capricorn . The parallel of latitude , which is 23 ° 28 ′ from the north pole , is called the arctic circle ; and that ...
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Common terms and phrases
angled spherical triangle Answer apparent altitude Atlantic Ocean bisected Cape celestial object centre chronometer circle column compass computed correction Cosec Cosine Cotang course and distance declination diff lat diff long Difference of Latitude difference of longitude Dist equal equator EXAMPLES FOR EXERCISE Given A B greater Greenwich Hence horizontal parallax Indian Archipelago Indian Ocean Island Latitude and Departure latitude and longitude logarithm longitude Lunar Distance meridian distance miles moon moon's Nautical Almanac noon observed opposite Pacific Ocean parallax parallel parallel sailing parallelogram perpendicular plane sailing polar distance pole quadrant radius rectangle rhumb line right angled spherical right ascension Secant semidiameter sides squares of A C subtract Suvers Suversed Sines Table Tang tangent Theo THEOREM triangle A B C true altitude true distance Vers
Popular passages
Page 18 - LET it be granted that a straight line may be drawn from any one point to any other point.
Page 17 - When equals are taken from unequals, the remainders are unequal. 6. Things which are double of the same thing, or equal things, are equal to each other.
Page 86 - III.), is a circle. If the plane pass through the centre, then, as every point in the surface of the sphere is equidistant from its centre, the section is a plane figure, every point of whose periphery is equidistant from a certain point within it, and the figure is therefore a circle. But if the plane do not pass through...
Page 26 - Therefore all the interior angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Page 114 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Page 63 - If from a point without a circle two straight lines be drawn, one of which...
Page 147 - Mathematical o>jgraphy.) the arc of the equator, intercepted between the first meridian...
Page 64 - If from any point without a circle straight lines be drawn touching it, the angle contained by the tangents is double the angle contained by the straight line joining the points of contact and the diameter drawn through one of them.
Page 139 - Given the vertical angle, the difference of the two sides containing it, and the difference of the segments of the base made by a perpendicular from the vertex ; construct the triangle.
Page 86 - ... half a right angle, as the tangent of half the sum of the angles, at the base of the triangle to the tangent of half their difference.