## Elements of Surveying: With a Description of the Instruments and the Necessary Tables, Including a Table of Natural Sines |

### From inside the book

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**staff**as nearly as possible in the direc- tion of the stations . Then , taking the**staff**in his right hand , let him stand off at arm's length , so that the person at the other end of the chain can align it exactly with the stations ... Page 55

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**staff**at A and another at b , in the direction towards C. Then slide up the chain on the**staff**at A until it becomes horizontal , and note the distance ab . Then remove the . staves and place them at b and d : make the chain horizontal ... Page 73

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**staff**was set up . From C a distance CF was measured , not in the direction DC , equal to 200 yards , and from D a distance DE equal to 200 yards , and the following angles taken , viz . AFC 83 ° 00 ' BDE = 54 ° 30 ' ACD = 53 ° 30 ' BDC ... Page 75

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**staff**at D or E : then will DAE be the perpendicular required . THIRD METHOD . 95. Let AB be the given line , and C ...**staff**at E. chain at A , and carry it round until it DA at A. Place a**staff**at A : then remove the end of the ... Page 76

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**staff**at F , and ADF will be a right angle , being an angle in a semi - circle . 97. There is a very simple instrument , used exclusively in laying off right angles on the ground , which is called the SURVEYING CROSS . Pl . 2. Fig . 1 ...### Other editions - View all

### Common terms and phrases

adjusted angle of elevation axis azimuth back-sights base line called centre clamp-screw coincide column comp compass Cosine D Cosine Sine Cotang course curve degrees determined difference of level direction divided double meridian distance draw east elongation error example feet field notes figure given angle given line given point ground Gunter's chain hence horizontal angle horizontal distance horizontal plane hypothenuse inches instrument intersection LatDegDegDegDeg Distance latitude and departure length levelling screws line AC line of collimation logarithm M.
M. Sine marked measure method multiplied natural sines needle object paper parallel passing perpendicular plane of reference protractor radius right angles right-angled triangle rods scale of equal secant side sights similar triangles Sine Sine spider's lines square chains staff subtract surface survey Tang tangent theodolite true meridian vernier plate vertical limb yards