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 121
... distance line , from the meridian ; as the circumferentor and quartered compass do . To take the angles of the field . PL . 6. fig . 6 . Lay the ends of your index to 360 ° , and 180 ° ; turn the whole about with the 360 from you ...
... distance line , from the meridian ; as the circumferentor and quartered compass do . To take the angles of the field . PL . 6. fig . 6 . Lay the ends of your index to 360 ° , and 180 ° ; turn the whole about with the 360 from you ...
Página 122
... meridian ; or to perform the office of the circumferentor , or quartered compass by the theodolite . Set your ... distance , set up your give . 122 THE THEODOLITE .
... meridian ; or to perform the office of the circumferentor , or quartered compass by the theodolite . Set your ... distance , set up your give . 122 THE THEODOLITE .
Página 123
... distance , set up your instru- ment at the second station ; unscrew it , and set either end of the index to the ... meridian ; and inasmuch as one pair is sufficient to find the angles of the field , the second can be of no use : besides ...
... distance , set up your instru- ment at the second station ; unscrew it , and set either end of the index to the ... meridian ; and inasmuch as one pair is sufficient to find the angles of the field , the second can be of no use : besides ...
Página 125
... distance will admit at every tenth degree are two numbers , one the number ... meridian , or flower - de - luce of the box , and there screw it fast ... distance to the second station , in chains THE PLANE TABLE . 125.
... distance will admit at every tenth degree are two numbers , one the number ... meridian , or flower - de - luce of the box , and there screw it fast ... distance to the second station , in chains THE PLANE TABLE . 125.
Página 126
... distance to the second station , in chains and links ; apply your instrument ... meridian line as before , to lay the index on the last drawn line , and look ... distance oo of the lines GH and LK , by the edge of the table ; take off ...
... distance to the second station , in chains and links ; apply your instrument ... meridian line as before , to lay the index on the last drawn line , and look ... distance oo of the lines GH and LK , by the edge of the table ; take off ...
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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