The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtJ.J. Harper, 1828 - 435 páginas |
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Página 4
... calculating the superficial content of any field ; also several new Rules and Problems , with practical examples , and various methods of finding the Areas of Maps , from their Geometrical Construction ; two of which , more concise than ...
... calculating the superficial content of any field ; also several new Rules and Problems , with practical examples , and various methods of finding the Areas of Maps , from their Geometrical Construction ; two of which , more concise than ...
Página 5
... 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 .
... 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 .
Página 9
... calculation of its area , or superficial content . When this art is employed in observing and delineating Coasts and Harbours , in determining their variation of the Compass , their Latitude , Longitude , and soundings , together with ...
... calculation of its area , or superficial content . When this art is employed in observing and delineating Coasts and Harbours , in determining their variation of the Compass , their Latitude , Longitude , and soundings , together with ...
Página 33
... should be taken from 10 ; but if the index exceed 9 , it must be taken from 19. - It is frequently used in the rule of Pro- portion and Trigonometrical calculations , to change subtractions- into Additions 5 OF LOGARITHMS . 33.
... should be taken from 10 ; but if the index exceed 9 , it must be taken from 19. - It is frequently used in the rule of Pro- portion and Trigonometrical calculations , to change subtractions- into Additions 5 OF LOGARITHMS . 33.
Página 34
... calculations , to change subtractions- into Additions . * EXAMPLES . 1st . If a clock gain 14 seconds in 5 days 18 hours , how much will it gain in 17 days 15 hours ? 5.75 days : Log . = 0.759668 17.625 days 14 Seconds :: Log ...
... calculations , to change subtractions- into Additions . * EXAMPLES . 1st . If a clock gain 14 seconds in 5 days 18 hours , how much will it gain in 17 days 15 hours ? 5.75 days : Log . = 0.759668 17.625 days 14 Seconds :: Log ...
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Términos y frases comunes
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