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

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Changing the scale Transit of Pole Star 176 263 Difference of

Changing the scale Transit of Pole Star 176 263 Difference of

**Altitude**of 7. Method of Dividing Pole Star and Pole 177 Land 271 Sun's Declination 178 8. Maritime Surveying 281 Reduction Table 182 The Protractor , 175 3. Page

Changing the scale Transit of Pole Star 176 of Maps 263 Difference of

Changing the scale Transit of Pole Star 176 of Maps 263 Difference of

**Altitude**of 7. Method of Dividing Pole Star and Pole 177 Land 271 Sun's Declination 178 8. Maritime Surveying 281 Reduction Table 182 83 of the Mathematical ... Page 58

... and parallelograms ABCF and BDEC , having the same

... and parallelograms ABCF and BDEC , having the same

**altitude**, have the same proportion between themselves as their bases BA and BD . Let any aliquot part of AB be taken , which will also measure BD : suppose that to be Ay , which ... Page 59

Triangles ABC , DEF , standing upon equal bases AB and DE , are to each other as their

Triangles ABC , DEF , standing upon equal bases AB and DE , are to each other as their

**altitudes**CG and FH . Let BI be perpendicular to AB and equal to CG , in which let KB = FH , and let Al and Aš be drawn . The triangle AIB = ACB ( by ... Page 168

... using the 180 side , it will serve as a semicircle ; by either of which you may survey in rainy weather , when you cannot have paper on the table . 3 TO MEASURE ANGLES OF

... using the 180 side , it will serve as a semicircle ; by either of which you may survey in rainy weather , when you cannot have paper on the table . 3 TO MEASURE ANGLES OF

**ALTITUDE**BY THE CIRCUMFERENTOR , 168 THE PLANE ' TABLE .### 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.