# 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

Harper, 1832 - Surveying - 348 pages

### Contents

 Sect 11 Of Logarithms 33 Elements of Geome 40 Mathematical Instru 47 Trigonometry 106
 The Circumferentor 121 Mensuration of Heights 137 Mensuration of Areas 151 Logarithms of Numbers 231 Description of Instru 243

### 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.