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

A. S. Barnes, 1839 - 412 sider

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 8ect Page 11 Of Logarithms 28 Elements of Geome 40 Trigonometry 82 PART II 98 The Chain 109 Mensuration of Heights 137
 Mensuration of Areas 151 Sect 191 PART III 231 Variation of the Com 243 Logarithms of Numbers 1 Sines and Tangents 17 Traverse Table 63

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Side 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.
Side 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.
Side 41 - The radius of a circle is a right line drawn from the centre to the circumference.
Side 45 - A lemma is something which is premised, or demonstrated, in order to render what follows more easy. A corollary is a consequent truth derived immediately from some preceding truth or demonstration.
Side 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.
Side 21 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.