The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art |
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... 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 Reduction Table 182 PART I. Page ...
... 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 Reduction Table 182 PART I. Page ...
Page 184
... hill . Given , Angle to the bottom , 48 ° . 30 . Angle to the top , 67 ° .00 / . Dist . to the foot of the object , 136 feet . Required , the height of the object . By Construction . Make the angle DAB - 48 30 184 OF HEIGHTS .
... hill . Given , Angle to the bottom , 48 ° . 30 . Angle to the top , 67 ° .00 / . Dist . to the foot of the object , 136 feet . Required , the height of the object . By Construction . Make the angle DAB - 48 30 184 OF HEIGHTS .
Page 239
... Dist . when west into the northings their sum is the area of the map . But , into the The merid east multiplied Dist when OF AREAS . 239.
... Dist . when west into the northings their sum is the area of the map . But , into the The merid east multiplied Dist when OF AREAS . 239.
Page 240
... Dist when west into the the sum of these products taken gives the area of the map . northings southings from the former These theorems are true , when the surveyor keeps the land he surveys , on his right hand , which we suppose through ...
... Dist when west into the the sum of these products taken gives the area of the map . northings southings from the former These theorems are true , when the surveyor keeps the land he surveys , on his right hand , which we suppose through ...
Page 243
... Dist . N 3.54 6.61 E Area . Deduct . 23.3994 E 6.6113.22 E N 9.67 15.02 E 2 NE 20 10.30 E 1.80 16.82 E 144.9430 3 East 0.00 24.92 E 16.20 E 8.1033.02 E S29.4423.28 E 4 SW 33 35.30 9.74 13.54 E 685.3632 5 SW 76 16.00 S 3.87 5.78 E W7.76 ...
... Dist . N 3.54 6.61 E Area . Deduct . 23.3994 E 6.6113.22 E N 9.67 15.02 E 2 NE 20 10.30 E 1.80 16.82 E 144.9430 3 East 0.00 24.92 E 16.20 E 8.1033.02 E S29.4423.28 E 4 SW 33 35.30 9.74 13.54 E 685.3632 5 SW 76 16.00 S 3.87 5.78 E W7.76 ...
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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.