A Treatise of Practical Surveying, ...1808 - 440 sider |
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Side 6
... Division of DECIMALS . Having divided as in whole numbers , annexing cyphers to the dividend if they be wanted ; the decimal places in the divisor and quotient must be equal to those in the dividend , and the defect sup plied by ...
... Division of DECIMALS . Having divided as in whole numbers , annexing cyphers to the dividend if they be wanted ; the decimal places in the divisor and quotient must be equal to those in the dividend , and the defect sup plied by ...
Side 53
... division . For , by cor . 1. theo . 20. AC ; AD :: AE : AB . Or , CD :: AE : EB . PROB . XV . To describe a circle about a triangle ABC or ( which is the same thing ) thro ' any three points , A , B , C , which are not situate in a ...
... division . For , by cor . 1. theo . 20. AC ; AD :: AE : AB . Or , CD :: AE : EB . PROB . XV . To describe a circle about a triangle ABC or ( which is the same thing ) thro ' any three points , A , B , C , which are not situate in a ...
Side 56
... divisions of the qua- drant BD , there be let fall perpendiculars , let these be transferred to the radius CD , and we ... division of the arc AD ; we shall have The same way we may have a line of chords . the sine , tangent , & c . to ...
... divisions of the qua- drant BD , there be let fall perpendiculars , let these be transferred to the radius CD , and we ... division of the arc AD ; we shall have The same way we may have a line of chords . the sine , tangent , & c . to ...
Side 57
... divisions be numbered with 1 , 2 , 3 , 4 , & c . as far as the ruler upon which they are transferred will admit , the scale is completed . These numbers , 1 , 2 , 3 , 4 , & c . usually stand for 10 , 20 , 30 , 40 , & c . and every one ...
... divisions be numbered with 1 , 2 , 3 , 4 , & c . as far as the ruler upon which they are transferred will admit , the scale is completed . These numbers , 1 , 2 , 3 , 4 , & c . usually stand for 10 , 20 , 30 , 40 , & c . and every one ...
Side 58
... division is 10 , every one of the subdi- visions is 1 , and every one downwards is one tenth of a perch ; or sometimes thus , every large divisi- on is called 100 , every subdivision 10 , and every one downwards 1 : or again ...
... division is 10 , every one of the subdi- visions is 1 , and every one downwards is one tenth of a perch ; or sometimes thus , every large divisi- on is called 100 , every subdivision 10 , and every one downwards 1 : or again ...
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A Treatise of Practical Surveying: Which is Demonstrated from Its First ... Robert Gibson Uten tilgangsbegrensning - 1806 |
Vanlige uttrykk og setninger
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
Populære avsnitt
Side 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.
Side 199 - ... that triangles on the same base and between the same parallels are equal...
Side 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.
Side 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.
Side 95 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Side 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.
Side 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.
Side 36 - XIII. •All parallelograms on the same or equal bases and between the same parallels...
Side 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.
Side 35 - Triangles upon equal bases, and between the same parallels, are equal to one another.