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

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Page 74

But , in proportion as the practice of geometry was

But , in proportion as the practice of geometry was

**extended**to the different arts , either connected with , or dependent upon it , new instruments became necessary , some to answer peculiar purposes , some to facilitate operation ... Page 77

... till the compasses are sufficiently opened to receive the middle and third finger ; they may then be

... till the compasses are sufficiently opened to receive the middle and third finger ; they may then be

**extended**at pleasure , by pushing the furthermost leg outwards with the middle , or pressing it inwards with the four finger . Page 81

... forming divisions of the third order . The divisions on all the scales are contained between four parallel lines ; those of the first order M ز

... forming divisions of the third order . The divisions on all the scales are contained between four parallel lines ; those of the first order M ز

**extend**to the most distant ; those of the third DRAWING INSTRUMENTS . 81. Page 82

**extend**to the most distant ; those of the third , to the least ; those of the second to the intermediate parallel . When the whole line of lines represents 100 , the divisions of the first order , or those to which the figures are ... Page 83

Multiply 5 by 6 ,

Multiply 5 by 6 ,

**extend**the compasses from the centre of the sector to 5 on the primary divisions , and open the ... distance from 10 to 10 on the same divisions ; then the parallel distance from 6 to 6 ,**extended**from the centre of ...### 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.