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

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Page 64

**PROB**. 1 . PL . 2. fig . 7 . To'make a triangle of three given right lines BO , LB , LO , of which any two must be greater than the third . Page 65

**PROB**. III . PL . 2. fig . 9. -- To biseci or divide into two equal fiarts , any given rightlined angle , BAC . In the lines . AB and AC , from the point A ... Page 66

**PROB**' , V. PL . 2. fig . 11 . On a giveri point A , in a right line EF , to erect a perpendicuiar . From the point A lay off on each side , the equal ... Page 67

**PROB**. VII . PL . 2. fig . 13 . From a given point 4 , to let fall a perpendicular upon a given right line BC . From any point D , in the given line ... Page 68

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**prob**. 2. The angle BAF = AFE , and by theo . 11. BA and CD are parallel .**PROB**. IX . PL . l . fig . 17 , Upon a giver line AB to describe a square ABCD ...### 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 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.