The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art |
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Page 29
... For the arrangement of Logarithms in a Table , the method of finding the Logarithm of any natural number , and of finding the natural number corres- ponding to any given Logarithm , therein : likewise for OF LOGARITHMS . 29.
... For the arrangement of Logarithms in a Table , the method of finding the Logarithm of any natural number , and of finding the natural number corres- ponding to any given Logarithm , therein : likewise for OF LOGARITHMS . 29.
Page 68
... method a rectangle or oblong , may be described , the sides thereof being given . PROB . X. PL . 2. fig . 15 . To divide a given right line AB , into any proposed number of equal parts . Draw the indefinite right line AP , making any ...
... method a rectangle or oblong , may be described , the sides thereof being given . PROB . X. PL . 2. fig . 15 . To divide a given right line AB , into any proposed number of equal parts . Draw the indefinite right line AP , making any ...
Page 71
... the centre , therefore , their point of intersection H , must be the centre . SCHOLIUM . By this method the centre of a circle may be found , by having only a segment of it given . PROB . XVI . PL . 3. fig . 4 PROBLEMS . 71.
... the centre , therefore , their point of intersection H , must be the centre . SCHOLIUM . By this method the centre of a circle may be found , by having only a segment of it given . PROB . XVI . PL . 3. fig . 4 PROBLEMS . 71.
Page 74
... method the sines , tangents , & c . may be drawn to any radius ; and then , after they are transferred to lines on a rule , we shall have the scales of sines , tangents , & c . ready for use . 1040 MATHEMATICAL DRAWING INSTRUMENTS . THE ...
... method the sines , tangents , & c . may be drawn to any radius ; and then , after they are transferred to lines on a rule , we shall have the scales of sines , tangents , & c . ready for use . 1040 MATHEMATICAL DRAWING INSTRUMENTS . THE ...
Page 78
... method than that by a screw . Two additional pieces , are often applied to these compasses ; these , by lengthening the leg , enable them to strike larger circles , or measure greater ex- tents , than they would otherwise perform , and ...
... method than that by a screw . Two additional pieces , are often applied to these compasses ; these , by lengthening the leg , enable them to strike larger circles , or measure greater ex- tents , than they would otherwise perform , and ...
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Common terms and phrases
acres altitude Answer arch azimuth base bearing blank line centre chains and links chord circle circumferentor Co-sec Co-tang column compasses contained decimal difference distance line divided divisions draw east Ecliptic edge feet field-book figures fore four-pole chains geom given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied natural co-sine natural sine needle Nonius number of degrees object observed off-sets opposite parallel parallelogram pegs perches perpendicular plane pole pole star Portmarnock PROB protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect Sextant side sights square station stationary distance subtract Sun's survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
Popular passages
Page 38 - 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.
Page 25 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Page 197 - RULE. From half the sum of the three sides subtract each side severally.
Page 106 - 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.
Page 27 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc. Thus BA is the versed sine of the arc AG.