A treatise on navigation, and nautical astronomyBaldwin, Cradock, and Joy, 1824 - 551 Seiten |
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Seite iii
... Middle Latitude , and Mercator's Sailing , in keeping a Sea Journal , and the construction of Charts . An investigation is given of the principles of the Quadrant , and other reflecting instruments for nautical observations . In ...
... Middle Latitude , and Mercator's Sailing , in keeping a Sea Journal , and the construction of Charts . An investigation is given of the principles of the Quadrant , and other reflecting instruments for nautical observations . In ...
Seite vii
... Middle Latitude and Mercator's Sailing On Charts ... Method of Keeping a Sea Journal 160 165 166 170 174 176 179 182 .... 194 ... 198 Principles of the Quadrant , Sextant , & c . 206 NAUTICAL ASTRONOMY , Definitions and Principles 209 ...
... Middle Latitude and Mercator's Sailing On Charts ... Method of Keeping a Sea Journal 160 165 166 170 174 176 179 182 .... 194 ... 198 Principles of the Quadrant , Sextant , & c . 206 NAUTICAL ASTRONOMY , Definitions and Principles 209 ...
Seite 16
... middle , as A B C , or CBA . 54. An angle in a segment of a circle is contained by two lines drawn from any point in the arc of the segment to the extremities of the same arc . B D 55. An angle on a segment , or on an arc , is contained ...
... middle , as A B C , or CBA . 54. An angle in a segment of a circle is contained by two lines drawn from any point in the arc of the segment to the extremities of the same arc . B D 55. An angle on a segment , or on an arc , is contained ...
Seite 37
... AB , BC , CD , and D A , is equal to the sum of the squares of the diagonals AC and BD , and four times the square of EF , which joins the middle points of the diagonals . A D B For the squares of AD and DC OF GEOMETRY . 37.
... AB , BC , CD , and D A , is equal to the sum of the squares of the diagonals AC and BD , and four times the square of EF , which joins the middle points of the diagonals . A D B For the squares of AD and DC OF GEOMETRY . 37.
Seite 58
... middle of the line required . B For join An , A m , B n , and B m ; then because A n and A m are respectively equal to Bn and Bm , and nm is common to both the triangles , A m n , and Bnm , the angles A n m and Bnm are equal . And hence ...
... middle of the line required . B For join An , A m , B n , and B m ; then because A n and A m are respectively equal to Bn and Bm , and nm is common to both the triangles , A m n , and Bnm , the angles A n m and Bnm are equal . And hence ...
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Häufige Begriffe und Wortgruppen
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
Beliebte Passagen
Seite 18 - LET it be granted that a straight line may be drawn from any one point to any other point.
Seite 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.
Seite 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...
Seite 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.
Seite 114 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Seite 63 - If from a point without a circle two straight lines be drawn, one of which...
Seite 147 - Mathematical o>jgraphy.) the arc of the equator, intercepted between the first meridian...
Seite 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.
Seite 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.
Seite 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.