The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtEvert Duyckinck, 1814 - 508 σελίδες |
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Σελίδα 106
... ; and the proportions being 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 compasses 106 TRIGONOMETRY .
... ; and the proportions being 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 compasses 106 TRIGONOMETRY .
Σελίδα 137
... , which is most usual ) as d is over A , while the leader puts down his peg at e : the eye can direct the horizon- tal position near enough , but if greater accuracy T were required , a quadrant applied to the chain , OF THE CHAIN . 137.
... , which is most usual ) as d is over A , while the leader puts down his peg at e : the eye can direct the horizon- tal position near enough , but if greater accuracy T were required , a quadrant applied to the chain , OF THE CHAIN . 137.
Σελίδα 145
... 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 distance from d to c be measured , and ...
... 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 distance from d to c be measured , and ...
Σελίδα 146
... direct line from B towards A , where let a peg be left , as at f , and again , the like distance from B in a direct line towards C , where let also another peg be left , as ate ; the distance from e to f is to be inserted in the field ...
... direct line from B towards A , where let a peg be left , as at f , and again , the like distance from B in a direct line towards C , where let also another peg be left , as ate ; the distance from e to f is to be inserted in the field ...
Σελίδα 158
... direct the sights along each leg of the angle , and note down their respective bearings , as before ; the difference of these bearings , if less than 180 , will be the quantity of degrees contain- ed in the given angle ; but if more ...
... direct the sights along each leg of the angle , and note down their respective bearings , as before ; the difference of these bearings , if less than 180 , will be the quantity of degrees contain- ed in the given angle ; but if more ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
acres altitude Answer arch base bearing blank line centre chains and links circle circle of latitude circumferentor Co-sec Co-tang column compasses contained decimal Dep Lat Dep difference Dist divided divisions draw east Ecliptic edge EXAMPLE feet field-book figures fore four-pole chains geometrical series given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied Natural Co-sines natural sine Nonius number of degrees object observed off-sets opposite parallelogram perches perpendicular plane pole pole star PROB proportion protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect semicircle Sextant side sights square root station stationary distance subtracted survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry vane versed sine vulgar fraction