## The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art |

### From inside the book

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Page

Of off - sets 250 Dip of the

Of off - sets 250 Dip of the

**Horizon**Dip for Dif . Dist of land by Intersections 257 Semi - diameter of the Sun ibid 6. Changing the scale Transit of Pole ... Page

Of OH - sets 250 Dip of the

Of OH - sets 250 Dip of the

**Horizon**175 3. Method of surveying Dip for Dif . Dist of land by Intersections 257 Semi - diameter of the Sun ibid 6. Page 138

... but to the plane of the

... but to the plane of the

**horizon**: thus if .4d , ef , gh , & c . were trees on the side of a hill , they grow perpendicular to the horizontal base AC ... Page 151

... placed a needle touched by a loadstone , which always retains the North and South points of the

... placed a needle touched by a loadstone , which always retains the North and South points of the

**horizon**nearly , 150 Note of the THE parts : Iaid ang ! Page 152

... that is , it always points to the North and South points of the

... that is , it always points to the North and South points of the

**horizon**nearly , when the instrument is horizontal , and the needle at rest .### What people are saying - Write a review

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### Common terms and phrases

acres altitude angle Answer arch base bearing called centre chains chord circle Co-sec Co-sine Co-tang column compasses contained decimal degrees Dep Lat difference direct Dist distance divided divisions draw drawn east edge equal EXAMPLE extended feet figures fixed four fourth give given glass greater ground half hand height Horizon inches laid land Lat Dep latitude length less logarithm manner marked measure meridian method minutes multiplied natural object observed opposite parallel perches perpendicular plane pole PROB proportion Quadrant quotient radius reduce remainder right angles right line root rule scale Secant sect side sights sine square station Sun's suppose survey taken Tang tangent theo third triangle true whole

### Popular passages

Page 40 - 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 27 - 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 201 - RULE. From half the sum of the three sides subtract each side severally.

Page 2 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.

Page 108 - 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 2 - ... then multiply the second and third terms together, and divide the product by the first term, and the quotient will be the answer ; — in the same denomination with the third term.

Page 29 - 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.