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
... 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 .
... 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
... Circumferentor 116 The 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 ...
... Circumferentor 116 The 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 ...
Σελίδα 116
... CIRCUMFERENTOR . THIS instrument is composed of a brass circular box , about five or six inches in diameter ; within which is a brass ring , divided on the top into 360 degrees , and numbered 10 , 20 ... CIRCUMFERENTOR The Circumferentor.
... CIRCUMFERENTOR . THIS instrument is composed of a brass circular box , about five or six inches in diameter ; within which is a brass ring , divided on the top into 360 degrees , and numbered 10 , 20 ... CIRCUMFERENTOR The Circumferentor.
Σελίδα 117
... Circumferentor . PL . 6. fig . 6 . Let your instrument be fixed at any angle as A , your first sta- tion ; and let a person stand at the next angle B , or cause a staff , with a white sheet , to be set there perpendicarly for an object ...
... Circumferentor . PL . 6. fig . 6 . Let your instrument be fixed at any angle as A , your first sta- tion ; and let a person stand at the next angle B , or cause a staff , with a white sheet , to be set there perpendicarly for an object ...
Σελίδα 118
... of three , for one of those who chain , may be your object ; but in fore - sights , you must have an It was said before , that a surveyor should have object before you , besides two chainmen . 118 THE CIRCUMFERENTOR .
... of three , for one of those who chain , may be your object ; but in fore - sights , you must have an It was said before , that a surveyor should have object before you , besides two chainmen . 118 THE CIRCUMFERENTOR .
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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