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 30
... true to 8 , or 9 places ; and therefore it will be very easy to examine any suspected Logarithm in the Tables . For the arrangement of . Logarithms in a Table , the method of finding the Logarithm of any natural number , and of finding ...
... true to 8 , or 9 places ; and therefore it will be very easy to examine any suspected Logarithm in the Tables . For the arrangement of . Logarithms in a Table , the method of finding the Logarithm of any natural number , and of finding ...
Página 77
... true , except the two first or two last terms of the proportion are on the line of tangents , and neither of them under 45 ° ; in this case the extent on the tangents is to be made in a contrary direction : for had the tangents above 45 ...
... true , except the two first or two last terms of the proportion are on the line of tangents , and neither of them under 45 ° ; in this case the extent on the tangents is to be made in a contrary direction : for had the tangents above 45 ...
Página 79
... true to seven places of decimals . Here , .0002908882 , the length of an arc of one minute , ( found above ) being multiplied by 300 , the number of minutes in 5 degrees , the pro- duct .08726646 is the length of an arc of 5 degrees ...
... true to seven places of decimals . Here , .0002908882 , the length of an arc of one minute , ( found above ) being multiplied by 300 , the number of minutes in 5 degrees , the pro- duct .08726646 is the length of an arc of 5 degrees ...
Página 115
... true , let the measure of the angle CHD be taken by the line oo , with the chain : if this angle corresponds with its containing sides , the length of the line DC is truly obtained , and the whole work is truly taken . Note . That in ...
... true , let the measure of the angle CHD be taken by the line oo , with the chain : if this angle corresponds with its containing sides , the length of the line DC is truly obtained , and the whole work is truly taken . Note . That in ...
Página 126
... true ; if not , turn the table about , the index lying on the last line , till through the sights you see the object in the first station and then screw it fast , and keeping the edge of the index to the second station , direct your ...
... true ; if not , turn the table about , the index lying on the last line , till through the sights you see the object in the first station and then screw it fast , and keeping the edge of the index to the second station , direct your ...
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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