The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtJ.J. Harper, 1828 - 435 σελίδες |
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Σελίδα 5
... ready than his . * This method , with very little alteration and improvement , in this country , is usually called the Pennsylvania Method of Calculation . - Ed . CONTENTS . . 105 The Circumferentor 116 The Theodolite - PREFACE .
... ready than his . * This method , with very little alteration and improvement , in this country , is usually called the Pennsylvania Method of Calculation . - Ed . CONTENTS . . 105 The Circumferentor 116 The Theodolite - PREFACE .
Σελίδα 7
... Theodolite - EXPLANATION Of the Mathematical Characters used in this Work . Method of dividing Land · Page Sect . 6 . 9 Changing the scale of Maps Page · 208 7 . 20 · 213 · 25 37 tions - 222 - 230 29 62 77 PART I. Sect . 1. Decimal ...
... Theodolite - EXPLANATION Of the Mathematical Characters used in this Work . Method of dividing Land · Page Sect . 6 . 9 Changing the scale of Maps Page · 208 7 . 20 · 213 · 25 37 tions - 222 - 230 29 62 77 PART I. Sect . 1. Decimal ...
Σελίδα 120
... the L GAB ; but if the degrees cut should be 298 ° and 105 ° , then 298-105 ° -193 ° , which taken from 360 ° , leaves 167 ° the GAB . THE THEODOLITE . Fig . 1. Frontispiece . THIS instrument 120 THE CIRCUMFERENTOR .
... the L GAB ; but if the degrees cut should be 298 ° and 105 ° , then 298-105 ° -193 ° , which taken from 360 ° , leaves 167 ° the GAB . THE THEODOLITE . Fig . 1. Frontispiece . THIS instrument 120 THE CIRCUMFERENTOR .
Σελίδα 121
... THEODOLITE . Fig . 1. Frontispiece . THIS instrument is a circle , commonly of brass , of ten or twelve inches in diameter , whose limb is divided into 360 degrees , and those again are subdivided into smaller parts , as the magnitude ...
... THEODOLITE . Fig . 1. Frontispiece . THIS instrument is a circle , commonly of brass , of ten or twelve inches in diameter , whose limb is divided into 360 degrees , and those again are subdivided into smaller parts , as the magnitude ...
Σελίδα 122
... theodolite . Set your instrument at the first station , and lay the index to 360 ° and 180 ° , with the flower - de - luce of the box next 360 ; unscrew the instrument , and turn the whole about , till the north and south points of the ...
... theodolite . Set your instrument at the first station , and lay the index to 360 ° and 180 ° , with the flower - de - luce of the box next 360 ; unscrew the instrument , and turn the whole about , till the north and south points of the ...
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ABCD acres altitude Answer arch base bearing centre chains and links circle circumferentor Co-sec Co-tang column compasses contained cube root decimal difference of latitude Dist divided divisions divisor draw east Ecliptic edge EXAMPLE feet field-book figure four-pole chains given angle given number half the sum height Hence Horizon glass hypothenuse inches instrument length logarithm measure Meridian Altitude meridian distance method multiplied natural co-sine natural number natural sine Nonius number of degrees object observed off-sets opposite parallel parallelogram perches perpendicular plane prob PROBLEM proportional protractor Quadrant quotient radius rhombus right angles right line Secant sect semicircle Sextant side square root station subtract Sun's survey taken Tang tangent theo theodolite THEOREM trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence