A Treatise of Practical Mathematics, Part 2W. & R. Chambers, 1842 |
From inside the book
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Page 2
... Horizontal Planes , 122 Geometrical Construction of Problems , 129 Projectiles on Inclined Planes , 130 Practical Gunnery , 137 Table of Actual and Potential Ranges in Terms of F , Problems . 144 145 FORTIFICATION . Permanent ...
... Horizontal Planes , 122 Geometrical Construction of Problems , 129 Projectiles on Inclined Planes , 130 Practical Gunnery , 137 Table of Actual and Potential Ranges in Terms of F , Problems . 144 145 FORTIFICATION . Permanent ...
Page 4
Andrew Bell. Definitions , DIALLING . Page 338 339 340 343 Construction of a Horizontal Dial , Construction of a Prime Vertical Dial , Construction of an Oblique Dial , Preliminary Problems , GEODETIC SURVEYING . · Reduction of a Base to ...
Andrew Bell. Definitions , DIALLING . Page 338 339 340 343 Construction of a Horizontal Dial , Construction of a Prime Vertical Dial , Construction of an Oblique Dial , Preliminary Problems , GEODETIC SURVEYING . · Reduction of a Base to ...
Page 7
... horizontal and the other in a vertical plane , and is used for measuring horizontal and vertical angles . I In the figure , HRS represents an oblique view of the horizontal circle , and mQn a direct view of the vertical one , which ...
... horizontal and the other in a vertical plane , and is used for measuring horizontal and vertical angles . I In the figure , HRS represents an oblique view of the horizontal circle , and mQn a direct view of the vertical one , which ...
Page 8
... horizontal circle at e ; then the difference between this and the former number is the required horizontal angle . 17. To measure a vertical angle ; direct the telescope to the object whose angle of elevation is required , then the arc ...
... horizontal circle at e ; then the difference between this and the former number is the required horizontal angle . 17. To measure a vertical angle ; direct the telescope to the object whose angle of elevation is required , then the arc ...
Page 18
... horizontal position by means of two spirit levels I R T lying in different directions , or by placing a ball on the table , and observing the position of it in which the ball remains . at rest . The edges of one side of the frame are ...
... horizontal position by means of two spirit levels I R T lying in different directions , or by placing a ball on the table , and observing the position of it in which the ball remains . at rest . The edges of one side of the frame are ...
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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...