A treatise on navigation, and nautical astronomy |
From inside the book
Results 1-5 of 34
Page 111
... column of lat . , and 129.3 for the fourth part of B C , in the column of dep . And under 39o , and opposite 210 , we have 163 2 and 132.2 for the fourth part of A B and B C respectively . Hence with the angle A 38 ° the fourth part of ...
... column of lat . , and 129.3 for the fourth part of B C , in the column of dep . And under 39o , and opposite 210 , we have 163 2 and 132.2 for the fourth part of A B and B C respectively . Hence with the angle A 38 ° the fourth part of ...
Page 112
... column of lat . we have in the columns of dist . and dep . about 193 , and 150 for the corresponding parts of A C and B C. And taking 52 ° for the angle A , we have 197 and 155.2 nearly , for the tenth parts of A C and B C. Hence with ...
... column of lat . we have in the columns of dist . and dep . about 193 , and 150 for the corresponding parts of A C and B C. And taking 52 ° for the angle A , we have 197 and 155.2 nearly , for the tenth parts of A C and B C. Hence with ...
Page 130
... column , whose height is 48 feet , at what distance from the base of the column , on the same horizontal plane , will the statue appear under the greatest possible vertical angle , and what will that angle be ? Answer , distance 53-6656 ...
... column , whose height is 48 feet , at what distance from the base of the column , on the same horizontal plane , will the statue appear under the greatest possible vertical angle , and what will that angle be ? Answer , distance 53-6656 ...
Page 167
... column , A B is found 114.4 in the lat column , and B C 93.9 in the dep column . BY GUNTER'S SCALE . Extend from 8 to 34 points , the course , on the line S R , and that extent will reach from 148 , the dist , towards the left on the ...
... column , A B is found 114.4 in the lat column , and B C 93.9 in the dep column . BY GUNTER'S SCALE . Extend from 8 to 34 points , the course , on the line S R , and that extent will reach from 148 , the dist , towards the left on the ...
Page 168
... column , and B C 75 , in the dep column , 4 A is found at the top of the table = 31 ° nearly , and AC in the dist column 146 . BY GUNTER'S SCALE . Extend from the diff lat 125 , to the dep 75 , on the line of num- bers , that extent ...
... column , and B C 75 , in the dep column , 4 A is found at the top of the table = 31 ° nearly , and AC in the dist column 146 . BY GUNTER'S SCALE . Extend from the diff lat 125 , to the dep 75 , on the line of num- bers , that extent ...
Other editions - View all
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.