A Treatise of Practical Surveying, ...1808 - 440 σελίδες |
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Σελίδα 67
... direct proportion given , to find a fourth . From the sum of the logarithms of the se- cond and third numbers ; deduct the logarithm of the first , the remainder will be the logandim of the fourth required . EXAM- EXAMPLE I. Let the ...
... direct proportion given , to find a fourth . From the sum of the logarithms of the se- cond and third numbers ; deduct the logarithm of the first , the remainder will be the logandim of the fourth required . EXAM- EXAMPLE I. Let the ...
Σελίδα 82
... direct ones , it follows , that if the third term be greater or less than the first , the fourth term will be also greater or less than the second : therefore the extent in your com- passes , from the first to the third term , will ...
... direct ones , it follows , that if the third term be greater or less than the first , the fourth term will be also greater or less than the second : therefore the extent in your com- passes , from the first to the third term , will ...
Σελίδα 123
... direct dis tance asunder , BC , is inaccessible : however it is known that a house at A , is 252 perches from B , and 230 from C ; and that the angle BAC , is found to be 70 ° . What is the distance BC , be- tween the two houses ? This ...
... direct dis tance asunder , BC , is inaccessible : however it is known that a house at A , is 252 perches from B , and 230 from C ; and that the angle BAC , is found to be 70 ° . What is the distance BC , be- tween the two houses ? This ...
Σελίδα 133
... direct the horizontal position near enough , but if greater accuracy were required , a quadrant applied to the chain , would settle that . In the same manner the rest may be chained up and down : but in going down it is plain the leader ...
... direct the horizontal position near enough , but if greater accuracy were required , a quadrant applied to the chain , would settle that . In the same manner the rest may be chained up and down : but in going down it is plain the leader ...
Σελίδα 141
... direct line from A towards G , where let a peg be left , as at c ; and again the like distance from A in a direct line towards B , where another peg is also to be left , as at d : let the dis- tance from d to be measured , and placed in ...
... direct line from A towards G , where let a peg be left , as at c ; and again the like distance from A in a direct line towards B , where another peg is also to be left , as at d : let the dis- tance from d to be measured , and placed in ...
Άλλες εκδόσεις - Προβολή όλων
A Treatise of Practical Surveying: Which Is Demonstrated From Its First ... Robert Gibson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
A Treatise of Practical Surveying: Which Is Demonstrated from Its First ... Department of Radiology Royal Melbourne Hospital Robert Gibson,Robert Gibson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
A Treatise of Practical Surveying: Which Is Demonstrated from Its First ... Department of Radiology Royal Melbourne Hospital Robert Gibson,Robert Gibson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2013 |
Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 199 - ... that triangles on the same base and between the same parallels are equal...
Σελίδα 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.
Σελίδα 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.
Σελίδα 95 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Σελίδα 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.
Σελίδα 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.
Σελίδα 36 - XIII. •All parallelograms on the same or equal bases and between the same parallels...
Σελίδα 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.
Σελίδα 35 - Triangles upon equal bases, and between the same parallels, are equal to one another.