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

### From inside the book

Results 1-5 of 54

Page 42

**Parallel**lines are such as are equi - distant from each other , as AB , CD . fig . 9 . 31. A figure is a space bounded by a line or lines . If the lines be right it is called a rectilineal figure , if curved it is called a curvilineal ... Page 43

Hence all triangles between the same

Hence all triangles between the same

**parallels**have the same height , since all the ... 42 , Quadrilateral figures , whose opposite sides are**parallel**, are called parallelograms : thus ABCD is a parallelogram . Fig . 3. 17 , GEOMETRY . Page 46

If two right lines not

If two right lines not

**parallel**, be produced towards their nearest distance , they will intersect each other . 9. Things which mutually agree with each other , are equal . NOTES . A theorem is a proposition , wherein something is ... Page 48

If a right line cross two

If a right line cross two

**parallels**, as GH does AB and CD , then , 1. Their external angles are equal to each other , that zs ... Since AB is**parallel**to CD , they may be considered as one broad line , crossed by another line , as GH ... Page 49

Viz . to B and A. Through Colet CE be drawn

Viz . to B and A. Through Colet CE be drawn

**parallel**to AB ; then since BD cuts the two**parallel**lines BA , CE ; the angle ECD = B , ( by part 3. of the last theo . ) and again , since AC cats the same**parallels**, the angle ACE = A ( by ...### What people are saying - Write a review

We haven't found any reviews in the usual places.

### 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 Hence 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 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 199 - 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.