The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 σελίδες |
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Σελίδα
... Horizon 175 Dip for Dif . Dist of land Semi - diameter of the Sun Transit of Pole Star ibid 176 263 Difference of Altitude of 7. Method of Dividing Pole Star and Pole 177 Land 271 Sun's Declination 178 8. Maritime Surveying 281 ...
... Horizon 175 Dip for Dif . Dist of land Semi - diameter of the Sun Transit of Pole Star ibid 176 263 Difference of Altitude of 7. Method of Dividing Pole Star and Pole 177 Land 271 Sun's Declination 178 8. Maritime Surveying 281 ...
Σελίδα
... Horizon 175 Dip for Dif . Dist of land Semi - diameter of the Sun Transit of Pole Star ibid 176 263 Difference of Altitude of 7. Method of Dividing Land 8. Maritime Surveying 281 Pole Star and Pole 177 271 Sun's Declination 178 ...
... Horizon 175 Dip for Dif . Dist of land Semi - diameter of the Sun Transit of Pole Star ibid 176 263 Difference of Altitude of 7. Method of Dividing Land 8. Maritime Surveying 281 Pole Star and Pole 177 271 Sun's Declination 178 ...
Σελίδα 135
... a stone drop , 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.
... a stone drop , 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.
Σελίδα 137
... 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.
... 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.
Σελίδα 138
... horizon- tal ones ; for all trees which grow upon any inclined surface , do not grow perpendicular thereto , but to the plane of the horizon : thus if Ad , ef , gh , & c . were trees on the side of a hill , they grow per- pendicular to ...
... horizon- tal ones ; for all trees which grow upon any inclined surface , do not grow perpendicular thereto , but to the plane of the horizon : thus if Ad , ef , gh , & c . were trees on the side of a hill , they grow per- pendicular to ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 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.
Σελίδα 197 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 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.
Σελίδα 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.