The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 من الصفحات |
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الصفحة 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 .
الصفحة 135
... , 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 end of the chain , in order to keep the OF THE CHAIN . 187.
... , 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 end of the chain , in order to keep the OF THE CHAIN . 187.
الصفحة 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 . 187.
... , 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 . 187.
الصفحة 145
... direct line from A , towards G , where let a peg be left , as at c ; and again , the like distance from 4 in a direct line towards B , where another peg is also to be left , as at d : let the distance from to c be measured , and placed ...
... direct line from A , towards G , where let a peg be left , as at c ; and again , the like distance from 4 in a direct line towards B , where another peg is also to be left , as at d : let the distance from to c be measured , and placed ...
الصفحة 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 at e ; 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 at e ; the distance from e to f is to be inserted in the field ...
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عبارات ومصطلحات مألوفة
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
مقاطع مشهورة
الصفحة 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.
الصفحة 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.
الصفحة 197 - RULE. From half the sum of the three sides subtract each side severally.
الصفحة 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.
الصفحة 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.