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 27
... gives the logarithm of their product ; and the difference of the logarithms , gives the logarithm of the quotient of the numbers : from the two pre- ceding logarithms , and the logarithm of 10 , which is 1 , a great many logarithms can ...
... gives the logarithm of their product ; and the difference of the logarithms , gives the logarithm of the quotient of the numbers : from the two pre- ceding logarithms , and the logarithm of 10 , which is 1 , a great many logarithms can ...
Σελίδα 29
... give the Logarithm sought , true to 8 , or 9 places ; and therefore it will be very easy to exa- mine any suspected Logarithm in the Tables . For the arrangement of Logarithms in a Table , the method of finding the Logarithm of any ...
... give the Logarithm sought , true to 8 , or 9 places ; and therefore it will be very easy to exa- mine any suspected Logarithm in the Tables . For the arrangement of Logarithms in a Table , the method of finding the Logarithm of any ...
Σελίδα 30
... give a na- tural number , that is , the product required . Whatever is carried from the decimal part of the Logarithm is to be added to the affirmative indices ; but subtracted from the negative . Likewise the in- dices must be added ...
... give a na- tural number , that is , the product required . Whatever is carried from the decimal part of the Logarithm is to be added to the affirmative indices ; but subtracted from the negative . Likewise the in- dices must be added ...
Σελίδα 50
... gives the other one . Cor . 2. In every acute angles are gle therefore 90 other . right - angled triangle , the two 90 degrees , or to one right an- one acute angle , gives the → THEO . VÌ . PL . 1. fig . 24 . If in any two triangles ...
... gives the other one . Cor . 2. In every acute angles are gle therefore 90 other . right - angled triangle , the two 90 degrees , or to one right an- one acute angle , gives the → THEO . VÌ . PL . 1. fig . 24 . If in any two triangles ...
Σελίδα 72
... of 60 ° from B , de- scribe the arc ed ; which distance ed , measured on the same line of chords , gives the quantity of the angle BAC , as required ; this is plain from def . 17 . PROB . XVIII . PL . 3. fig . 6 $ 2 GEOMETRICAL.
... of 60 ° from B , de- scribe the arc ed ; which distance ed , measured on the same line of chords , gives the quantity of the angle BAC , as required ; this is plain from def . 17 . PROB . XVIII . PL . 3. fig . 6 $ 2 GEOMETRICAL.
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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