## The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art. With a New Set of Accurate Mathematical Tables |

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acres altitude angle Answer arch base bearing called centre chord circle column compasses contained contents correction decimal departure describe difference direct distance divided divisions draw drawn east edge equal error EXAMPLE extended feet figure fixed four fourth give given glass greater ground half height Hence horizon inches laid land latitude length less logarithms manner marked measure meridian distance method middle minutes multiplied object observed opposite parallel passes perches perpendicular plane prob PROBLEM proportion quadrant quotient radius reduce remaining right angles right line root rule scale secant sect side sights sine square station subtract suppose survey taken tangent term theo third triangle triangle ABC true whole

### Popular passages

Page 173 - In like manner, when it is said, that " triangles on the same base, and between the same parallels, are equal...

Page 49 - 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 163 - RULE. From half the sum of the three sides subtract each side severally.

Page 41 - 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 97 - 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 41 - The radius of a circle is a right line drawn from the centre to the circumference.

Page 52 - Triangles upon equal bases, and between the same parallels, are equal to one another.

Page 24 - The square of the sum of two numbers is equal to the square of the first number plus twice the product of the first and second number plus the square of the second number.

Page 35 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.