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 2
... Plane Trigonometry . SECTION I. DECIMAL FRACTIONS . If we suppose unity or any one thing to be di- vided into any assigned number of equal parts , this number is called the denominator ; and if we chuse to take any number of such parts ...
... Plane Trigonometry . SECTION I. DECIMAL FRACTIONS . If we suppose unity or any one thing to be di- vided into any assigned number of equal parts , this number is called the denominator ; and if we chuse to take any number of such parts ...
Σελίδα 36
... . -1.484241 - Quot . - Log.of.304959 ans , 4. Required the cube root of 12345 . Index 3 ) 4.091491 = Log . of 12345 . 1.363830 = Quot , Log . of 23.116 . Ans . SECTION IV . ELEMENTS OF PLANE GEOMETRY . ( DEFINITIONS 36 OF LOGARITHMS ,
... . -1.484241 - Quot . - Log.of.304959 ans , 4. Required the cube root of 12345 . Index 3 ) 4.091491 = Log . of 12345 . 1.363830 = Quot , Log . of 23.116 . Ans . SECTION IV . ELEMENTS OF PLANE GEOMETRY . ( DEFINITIONS 36 OF LOGARITHMS ,
Σελίδα 37
... PLANE GEOMETRY . ( DEFINITIONS . See PLATE I. 1. GEOMETRY is that science wherein we consider the properties of magnitude . 2. A point is that which has no parts , being of itself indivisible ; as A. 3. A line has length but no breadth ...
... PLANE GEOMETRY . ( DEFINITIONS . See PLATE I. 1. GEOMETRY is that science wherein we consider the properties of magnitude . 2. A point is that which has no parts , being of itself indivisible ; as A. 3. A line has length but no breadth ...
Σελίδα 75
... plane scale , a pair of compasses with a moveable leg , and two spare points , which may be applied occasionally to the compasses ; one of these points is to hold ink ; the other , a porte crayon , for holding a piece of black - lead ...
... plane scale , a pair of compasses with a moveable leg , and two spare points , which may be applied occasionally to the compasses ; one of these points is to hold ink ; the other , a porte crayon , for holding a piece of black - lead ...
Σελίδα 77
... , and care should be taken not to press forcibly upon them , but rather to let them act by their own weight ; the legs should never be so far extended , as to form · an obtuse angle with the paper or plane , DRAWING INSTRUMENTS . 77.
... , and care should be taken not to press forcibly upon them , but rather to let them act by their own weight ; the legs should never be so far extended , as to form · an obtuse angle with the paper or plane , DRAWING INSTRUMENTS . 77.
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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