A Complete Treatise on Practical Mathematics: Including the Nature and Use of Mathematical Instruments: Logarithmic Tables, Trigonometry, Mensuration of Heights and Distances,--of Surfaces & Solids, Land Surveying, Gunnery, Gauging, Artificer's Measuring, Miscellaneous Exercises. With an Appendix on Algebra ... Principally Designed for the Use of Schools and AcademiesBell and Bradfute, 1792 - 431 páginas |
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Página 46
... Theodolite and the Geometrical square . The Geometrical quadrant is used for investigating vertical angles ; whether they be angles of * altitude , or angles of de- preffion . The Theodolite serves for measuring angles on a horizontal ...
... Theodolite and the Geometrical square . The Geometrical quadrant is used for investigating vertical angles ; whether they be angles of * altitude , or angles of de- preffion . The Theodolite serves for measuring angles on a horizontal ...
Página 47
... theodolite , which are called the fixed fights . Fig . 2. plate 4 . Sights are small pieces of wood or brass , having small holes or flits in them , to view the object through ; --- They are fixed perpendicular to the plane of the ...
... theodolite , which are called the fixed fights . Fig . 2. plate 4 . Sights are small pieces of wood or brass , having small holes or flits in them , to view the object through ; --- They are fixed perpendicular to the plane of the ...
Página 245
... theodolite , and plain table . The gunter's chain , whether Scots or English , is divided in- to 100 links . The English chain is 66 feet , and the Scots 74 ; consequently a link of the English chain is 7.92 inches , and that of the ...
... theodolite , and plain table . The gunter's chain , whether Scots or English , is divided in- to 100 links . The English chain is 66 feet , and the Scots 74 ; consequently a link of the English chain is 7.92 inches , and that of the ...
Página 248
... theodolite , directing the fixed fights in the direc- tion DB , and the index to C : if it cuts the limb of the instru- ment at an angle of 90 ° , you have guessed right ; but if it does not , go towards B or D till you hit the point ...
... theodolite , directing the fixed fights in the direc- tion DB , and the index to C : if it cuts the limb of the instru- ment at an angle of 90 ° , you have guessed right ; but if it does not , go towards B or D till you hit the point ...
Página 263
... theodolite the quantity of the angle BAE , which infert in the middle column . Then write a cypher below to denote the station , and another in the right hand columri to signify that at the station A there is no off - fet ; and at the ...
... theodolite the quantity of the angle BAE , which infert in the middle column . Then write a cypher below to denote the station , and another in the right hand columri to signify that at the station A there is no off - fet ; and at the ...
Términos y frases comunes
abfciffa abſciſſa acres alſo altitude amplitude bafe becauſe breadth centre chord of half circle circumference Co-tan column conjugate conſequently correſponding cubic deſcribe diſt diſtance divided elliptic equal EXAMPLE fame feet fide fimilar find the area find the folidity firſt fruſtum fubtract furface given half the arch horizontal houſe hyperbola inches inſtrument leſs logarithm malt buſhels meaſure multiply the ſum object obſerved off-fets oppoſite ordinate parabola perpendicular plane Plate PROBLEM quotient radius 90 rectangle Required the area Required the folidity rhombus right angles RULE ſame ſay Secant Co-fec ſecond ſegment ſhadow ſhall ſolidity ſpaces ſphere ſpheroid ſpindle ſquare root ſquare yards ſtaff ſtation ſteeple ſtraight line ſuch ſum ſuperficies tangent theodolite theſe tranſverſe trapezium triangle uſed verſed ſine whoſe baſe whoſe diameter whoſe height whoſe length whoſe ſide wine gallons Το
Pasajes populares
Página 27 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc.
Página 103 - Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Página 3 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Página 220 - E, is equal to twice as many right angles as the figure has sides, less four right angles.
Página 1 - ... common to the two triangles AFE, BFE, there are two sides in the one equal to two sides in the other, each to each ; and the base EA is equal to the base EB ; (i.
Página 38 - BG; that is, the fum of the fides is to their difference, as the tangent of half the fum of the angles at the bafe to the tangent of half their difference.
Página 352 - Subtract the square number from the left hand period, and to the remainder bring down the next period for a dividend. III. Double the root already found for a divisor ; seek how many times the divisor is contained...
Página 38 - AB the greater side for a distance, let a circle be described, meeting AC, produced in E, F, and BC in D; join DA, EB, FB; and draw FG parallel to BC, meeting EB in G. The angle EAB (32.
Página 38 - ACB (32. 1.) is equal to the angles CAD and ADC, or ABC together ; therefore FAD is the difference of the angles at the...
Página 375 - TO divide a given ftraight line into two parts, fo that the rectangle contained by the whale, and one of the parts, fhall be equal to the fquare of the other part. Let AB be the given ftraight line; it is required to divide it into two parts, fo that the rectangle contained by the whole, and one of the parts, fhall be equal to the fquare of the other part. Upon AB...