A treatise on navigation, and nautical astronomyBaldwin, Cradock, and Joy, 1824 - 551 Seiten |
Im Buch
Ergebnisse 1-5 von 73
Seite 4
... true remainder by c ; for , in subtracting d from a + b , too much by c had been taken away . - - If therefore c were added to a + b d , the sum a + b d + c would be the required difference of the two given quantities . Hence , the ...
... true remainder by c ; for , in subtracting d from a + b , too much by c had been taken away . - - If therefore c were added to a + b d , the sum a + b d + c would be the required difference of the two given quantities . Hence , the ...
Seite 48
... true also of squares and rectangles . Cor . 2. When the two means are equal , their rectangle becomes a square ; and hence it follows , that when three lines are propor- tionals , the rectangle of the extremes is equal to the square of ...
... true also of squares and rectangles . Cor . 2. When the two means are equal , their rectangle becomes a square ; and hence it follows , that when three lines are propor- tionals , the rectangle of the extremes is equal to the square of ...
Seite 156
... true north point of the horizon , but at the North Cape it points only about 1 ° towards the west , while in some parts of Davis's Straits its direction is more than 64 points towards the west , and near Cape Horn it points about 22 ...
... true north point of the horizon , but at the North Cape it points only about 1 ° towards the west , while in some parts of Davis's Straits its direction is more than 64 points towards the west , and near Cape Horn it points about 22 ...
Seite 157
... true meridian will be six points , or the ship's true course will be WN W. Hence when the compass course is given to determine the true course , allow the variation , if it be westerly , to the left of the com- pass course , and when ...
... true meridian will be six points , or the ship's true course will be WN W. Hence when the compass course is given to determine the true course , allow the variation , if it be westerly , to the left of the com- pass course , and when ...
Seite 158
... true distance . The operation for estimating the rate is called by seamen heaving the log . The time is measured by a sand glass , which ought of course to run out in 30 seconds . A quantity of the 158 ON THE COMPASS.
... true distance . The operation for estimating the rate is called by seamen heaving the log . The time is measured by a sand glass , which ought of course to run out in 30 seconds . A quantity of the 158 ON THE COMPASS.
Andere Ausgaben - Alle anzeigen
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.