The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art |
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... Compass 6. Changing the scale of Maps -Of Distances 194 3. Mensuration of Areas 200 General Method 232 Pennsylvania Method 246 4. Of Off - sets 5. Method of surveying by Intersections 257 Mean Refraction Sun's Parallax Traverse Table 83 ...
... Compass 6. Changing the scale of Maps -Of Distances 194 3. Mensuration of Areas 200 General Method 232 Pennsylvania Method 246 4. Of Off - sets 5. Method of surveying by Intersections 257 Mean Refraction Sun's Parallax Traverse Table 83 ...
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... Compass Traverse Table 83241 71 474 250 Dip of the 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 ...
... Compass Traverse Table 83241 71 474 250 Dip of the 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 ...
Page 1
... Compass , their Latitude , Longitude and soundings , together with the bearings of their most remarkable places from each other , it is usually denominated Mari- time - Surveying . This branch of Surveying , how- ever , demands no other ...
... Compass , their Latitude , Longitude and soundings , together with the bearings of their most remarkable places from each other , it is usually denominated Mari- time - Surveying . This branch of Surveying , how- ever , demands no other ...
Page 67
... compasses in F , describe the arc AE , and with the like interval and one foot in A , describe the arc BF , making BF - AE ; through A and B draw the line AB , and it will be parallel to CD . By prob . 2. The angle BAFAFE , and by ...
... compasses in F , describe the arc AE , and with the like interval and one foot in A , describe the arc BF , making BF - AE ; through A and B draw the line AB , and it will be parallel to CD . By prob . 2. The angle BAFAFE , and by ...
Page 74
... compasses . But , in proportion as the practice of geometry was extended to the different arts , either connected with , or dependent upon it , new instru- ments became necessary , some to answer peculiar purposes , some to facilitate ...
... compasses . But , in proportion as the practice of geometry was extended to the different arts , either connected with , or dependent upon it , new instru- ments became necessary , some to answer peculiar purposes , some to facilitate ...
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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.