A Treatise of Practical Surveying, ...1808 - 440 páginas |
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Página
... latitude and departure , to the distance of 100 , and to every 15 Minutes of the quadrant ; a table of logarithms from 1 to 10,000 ; and a table of arti- ficial sines , tangents , and secants ; also an example of calculating the ...
... latitude and departure , to the distance of 100 , and to every 15 Minutes of the quadrant ; a table of logarithms from 1 to 10,000 ; and a table of arti- ficial sines , tangents , and secants ; also an example of calculating the ...
Página
... these methods is annexed a short table of difference of latitude and half departure , to every degree and quarter of a degree of the quadrant , the stationary distance being one one chain ; which will be found as ready , PREFACE .
... these methods is annexed a short table of difference of latitude and half departure , to every degree and quarter of a degree of the quadrant , the stationary distance being one one chain ; which will be found as ready , PREFACE .
Página 191
... On this 10th problem are founded most of the calcula- tions of differences by latitude and departure , and those by off- sets , following in this treatise . 61.67 Multiply . 30 + 49 = 79 . 2 To find the Content of Ground . " 191.
... On this 10th problem are founded most of the calcula- tions of differences by latitude and departure , and those by off- sets , following in this treatise . 61.67 Multiply . 30 + 49 = 79 . 2 To find the Content of Ground . " 191.
Página 206
... latitude , or the northing or southing of any stationary line , is the distance that one end of the line is north or south from the other end ; or it is the distance which is in- tercepted on the meridian , between the beginning of the ...
... latitude , or the northing or southing of any stationary line , is the distance that one end of the line is north or south from the other end ; or it is the distance which is in- tercepted on the meridian , between the beginning of the ...
Página 207
... latitude , or northing , and AC the departure or westing of the line BA . 4. That meridian which passes through the first station , is sometimes called the first meridian ; and sometimes it is a meridian passing on the east or west side ...
... latitude , or northing , and AC the departure or westing of the line BA . 4. That meridian which passes through the first station , is sometimes called the first meridian ; and sometimes it is a meridian passing on the east or west side ...
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Términos y frases comunes
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
Pasajes populares
Página 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.
Página 199 - ... that triangles on the same base and between the same parallels are equal...
Página 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.
Página 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.
Página 95 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Página 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.
Página 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.
Página 36 - XIII. •All parallelograms on the same or equal bases and between the same parallels...
Página 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.
Página 35 - Triangles upon equal bases, and between the same parallels, are equal to one another.