A Treatise of Practical Surveying, ...1808 - 440 من الصفحات |
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الصفحة 123
... piece of ground , which by an old survey we find to be thus : AB 260 , AC 160 , BC 150 perches : the mearing lines AC and BC , are destroyed or plowed down , and and the line AB , only remaining . What angles OF DISTANCES . 123.
... piece of ground , which by an old survey we find to be thus : AB 260 , AC 160 , BC 150 perches : the mearing lines AC and BC , are destroyed or plowed down , and and the line AB , only remaining . What angles OF DISTANCES . 123.
الصفحة 141
... piece of ground , by going round it , and the method of taking the angles of the field , by the chain only , Plate VI . fig . 6 , Let ABCDEFG be a piece of ground to be surveyed : beginning at the point A , let one chain be laid in a ...
... piece of ground , by going round it , and the method of taking the angles of the field , by the chain only , Plate VI . fig . 6 , Let ABCDEFG be a piece of ground to be surveyed : beginning at the point A , let one chain be laid in a ...
الصفحة 144
... piece of ground may be surveyed by a two - pole chain . PROB . II . To take a survey of a piece of ground from any point within it , from whence all the angles can be seen ; by the chain only . Plate VI . fig . 6 . Let a mark Let 144 OF ...
... piece of ground may be surveyed by a two - pole chain . PROB . II . To take a survey of a piece of ground from any point within it , from whence all the angles can be seen ; by the chain only . Plate VI . fig . 6 . Let a mark Let 144 OF ...
الصفحة 174
... piece of ground . 1. Multiply the base in perches , into the per- pendicular in perches ( or square the base ) the pro- duct will be the content in perches ; and because 160 perches make an acre , it must thence follow , that Any area ...
... piece of ground . 1. Multiply the base in perches , into the per- pendicular in perches ( or square the base ) the pro- duct will be the content in perches ; and because 160 perches make an acre , it must thence follow , that Any area ...
الصفحة 175
... piece of ground in a square form , whose side is a perch , must contain a perch of ground ; and that 40 such perches make a rood , or stang , and four roods an acre ; or which is the same thing , that 160 square perches make an acre as ...
... piece of ground in a square form , whose side is a perch , must contain a perch of ground ; and that 40 such perches make a rood , or stang , and four roods an acre ; or which is the same thing , that 160 square perches make an acre as ...
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عبارات ومصطلحات مألوفة
40 perches ABCD acres altitude Answer base bearing blank line centre chains and links chord circle circumferentor Co-fecant Secant Co-fine Co-tang column contained cyphers decimal decimal fraction diameter difference Dift Diſt distance line divided draw drawn east edge EXAMPLE feet field-book figures fore four-pole chains half the sum height hypothenuse inches instrument latitude logarithm measure meridian distance method multiplied needle number of degrees object off-sets parallel parallelogram perpendicular piece of ground plane Plate pole Portmarnock PROB protractor quotient radius right angles right line scale of equal second station sect semicircle side sights sine square root stationary distance stationary line sun's survey taken tangent thence theo theodolite thro trapezium triangle ABC trigonometry true amplitude two-pole chains vane variation Vulgar Fraction whence ΙΟ
مقاطع مشهورة
الصفحة 32 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
الصفحة 199 - ... that triangles on the same base and between the same parallels are equal...
الصفحة 94 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
الصفحة 23 - Four quantities are said to be in proportion when the product of the extremes is equal to that of the means : thus if A multiplied by D, be equal to B multiplied by C, then A is said to be to B as C is to D.
الصفحة 95 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
الصفحة 37 - ABDE+ACGF the sum of the squares —BKLH-\-KCML, the sum of the two parallelograms or square BCMH; therefore the sum of the squares on AB and AC is equal to the square on BC.
الصفحة 24 - Things that are equal to one and the same thing, are equal to each other. 2. Every whole is greater than its part. % 3. Every whole is equal to all its parts taken together. 4 If to equal things, equal things be added, the whole will be equal. 5. If from equal things, equal things be deducted the remainders will be equal.
الصفحة 36 - XIII. •All parallelograms on the same or equal bases and between the same parallels...
الصفحة 182 - VI. To find the content of a triangular piece of ground, Multiply the base by half the perpendicular, or the perpendicular by half the base ; or take half the product of the base into the perpendicular. The reason hereof is plain, from cor.
الصفحة 35 - Triangles upon equal bases, and between the same parallels, are equal to one another.