A Treatise of Practical Mathematics, Part 2W. & R. Chambers, 1842 |
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Page 231
... noon , it is the difference between 12 o'clock mean time , and the time of the sun's passing the meridian . 419. A sidereal day is the interval between two succes- sive transits of the same star over the meridian . This interval is just ...
... noon , it is the difference between 12 o'clock mean time , and the time of the sun's passing the meridian . 419. A sidereal day is the interval between two succes- sive transits of the same star over the meridian . This interval is just ...
Page 232
... noon , and is reckoned till next noon ; and it is thus twelve hours later than the civil day . 421. As the moon's right ascension increases at a greater rate than that of the sun , there is a retardation of mean lunar on mean solar time ...
... noon , and is reckoned till next noon ; and it is thus twelve hours later than the civil day . 421. As the moon's right ascension increases at a greater rate than that of the sun , there is a retardation of mean lunar on mean solar time ...
Page 235
... noon of the preceding day . The rule for the converse problem is evident . " EXAMPLES . 1. April 6th at 3h 12m P.M. , civil time , is in astronomical time also April 6th 3h 12m . 2. June 1st at 10h 15m A.M. , of civil time , is May 31st ...
... noon of the preceding day . The rule for the converse problem is evident . " EXAMPLES . 1. April 6th at 3h 12m P.M. , civil time , is in astronomical time also April 6th 3h 12m . 2. June 1st at 10h 15m A.M. , of civil time , is May 31st ...
Page 236
... is increasing , add this proportional * These elements of the sun's place are registered in the Nautical Almanac for noon of every day at Greenwich . part to it ; and when diminishing , subtract it 236 PRACTICAL MATHEMATICS .
... is increasing , add this proportional * These elements of the sun's place are registered in the Nautical Almanac for noon of every day at Greenwich . part to it ; and when diminishing , subtract it 236 PRACTICAL MATHEMATICS .
Page 237
... noon on 29th Sun's declination at noon on 30th - 8 56 31 = 0 21 28 = v ' Variation of declination in 24h And 24h : 21h 37m 51s = 21 ′ 28 ′′ : v , and v = 0 ° 19 ′ 21 ′′ Hence , the required declination D ' - v = D = 8 58 38 Or , by ...
... noon on 29th Sun's declination at noon on 30th - 8 56 31 = 0 21 28 = v ' Variation of declination in 24h And 24h : 21h 37m 51s = 21 ′ 28 ′′ : v , and v = 0 ° 19 ′ 21 ′′ Hence , the required declination D ' - v = D = 8 58 38 Or , by ...
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Common terms and phrases
actual range bastion body breadth bung diameter called cask centre constructed content in imperial cosec cosine course declination deflexion depth dial difference of latitude difference of longitude distance ditch divide divisor draw earth elevation equal EXAMPLE EXERCISES fathoms Find the content flank frustum gauge point glacis hence horizontal hypotenuse imperial bushels imperial gallons impetus inches inclination length logarithms longitude mean diameter measure meridian middle moon's multiply number of balls oblique observed opposite parallax parallel parapet perpendicular pile place of arms plane plane sailing pole potential range preceding primitive PROBLEM projectile projection proportional quadrant quotient radius ravelin redoubt refraction right angle right ascension sailing semi-diameter Severndroog Castle side sidereal sin² sine Sliding Rule small circle specific gravity spherical angle spherical excess spherical triangle spherical trigonometry square sun's surface true altitude ullage velocity vessel weight
Popular passages
Page 196 - Fig. 9. Case 1. Let AB, AC be each less than a quadrant. Let AE, AG be quadrants ; G will be the pole of AB, and E the pole of AC, and EC a quadrant; but, by prop. 12. CE is greater than CB, since CB is farther off from CGD than CE. In the same manner, it is shown...
Page 95 - To the square of the bung diameter add the square of the head diameter ; multiply the sum by the length, and the product again by .0014 for ale gallons, or by .0017 for wine gallons.
Page 96 - RULE. — To the square of the bung diameter add the square of the head diameter ; multiply the sum by the length, and the product by .0014 for ale gallons, or by .0017 for wine gallons.
Page 42 - A magnitude which has length, breadth, and thickness. Solution. The process by which the answer to a question is obtained. Specific gravity of a substance. The ratio of the weight of a given volume of it to that of an equal volume of water.
Page 192 - A sphere is a solid, bounded by one continued convex surface, every point of which is equally distant from a point within, called the centre. The sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains fixed.
Page 227 - ZODIAC.— The Zodiac is an imaginary belt, or broad circle, extending quite around the heavens. The ecliptic divides the zodiac into two equal parts, the zodiac extending 8 degrees on each side of the ecliptic, and therefore is 16 degrees wide.
Page 196 - BC will be greater than a quadrant : for let AE be a quadrant, then E is the pole of AC, and EC will be a quadrant. But CB is greater than CE by Prop. 12.
Page 195 - Oj the same affection with the angles opposite to them, that is, if the sides be greater or less than quadrants, the opposite angles will be greater or less than right angles, and conversely.
Page 195 - IN a right angled spherical triangle, the sides are of the same affection with the opposite angles ; that is, if the sides be greater or less than quadrants, the opposite angles will be greater or less than right angles. Let ABC be a spherical triangle right angled at A, any side AB, will be of the same affection with the opposite angle ACB. Case 1.
Page 195 - ... will be greater than a quadrant. Let ABC be a right angled spherical triangle ; according as the two sides AB, AC are of the same or of different affection, the hypotenuse BC will be less, or greater than a quadrant. The...