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 39
... arch ( that is , any part of the circumference of a circle ) to the other ; and is the measure of the arc . Thus the right line HG , is the measure of the arc HBG . fig . 8 . 18. The segment of a circle is any part thereof , which is ...
... arch ( that is , any part of the circumference of a circle ) to the other ; and is the measure of the arc . Thus the right line HG , is the measure of the arc HBG . fig . 8 . 18. The segment of a circle is any part thereof , which is ...
Σελίδα 64
... arches and circles . If the arch or circle is to be described obscurely , the steel points are best adapted to the purpose ; if it is to be in ink or black lead , either the drawing pen , or crayon points are to be used . To use a pair ...
... arches and circles . If the arch or circle is to be described obscurely , the steel points are best adapted to the purpose ; if it is to be in ink or black lead , either the drawing pen , or crayon points are to be used . To use a pair ...
Σελίδα 65
... arches or circles , which they do much more conveniently than large compasses , not only on account of their size ... arch or circle is to be de- scribed , of more than an inch radius , the point should be so bent , that the blades of ...
... arches or circles , which they do much more conveniently than large compasses , not only on account of their size ... arch or circle is to be de- scribed , of more than an inch radius , the point should be so bent , that the blades of ...
Σελίδα 66
... arches they describe . Sectors are made of different sizes , but their length is usually denominated from the length of the legs when the sector is shut . Thus a sector of six inches , when the legs are close together , forms a rule of ...
... arches they describe . Sectors are made of different sizes , but their length is usually denominated from the length of the legs when the sector is shut . Thus a sector of six inches , when the legs are close together , forms a rule of ...
Σελίδα 68
... arch . 2. Make the same radius a transverse distance between 60 and 60 on the same line of chords . 3. Take out the transverse distance of the given degrees , and lay this on the arch , which will mark out the angular distance required ...
... arch . 2. Make the same radius a transverse distance between 60 and 60 on the same line of chords . 3. Take out the transverse distance of the given degrees , and lay this on the arch , which will mark out the angular distance required ...
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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