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 7
... Natural Sines · 150 Points of the Compass - 177 Traverse Table - Me- - 187 Of computing the Area of a Survey , geometrically con- sidered and de- monstrated 4. Of Off - Sets Mean Refraction Sun's Parallax · - 246 1 20 · 71 82 83 174 175 ...
... Natural Sines · 150 Points of the Compass - 177 Traverse Table - Me- - 187 Of computing the Area of a Survey , geometrically con- sidered and de- monstrated 4. Of Off - Sets Mean Refraction Sun's Parallax · - 246 1 20 · 71 82 83 174 175 ...
Página 26
... natural numbers , therefore by assuming xa , then by squaring xa2 hence a2 = a , and consequently by division a = 1 , from whence it is evident , that the log . of 1 is always o , in any system ; for more on this subject , and the ...
... natural numbers , therefore by assuming xa , then by squaring xa2 hence a2 = a , and consequently by division a = 1 , from whence it is evident , that the log . of 1 is always o , in any system ; for more on this subject , and the ...
Página 30
... natural number , and of finding the natural number corresponding to any given Logarithm , therein : like- wise for particular rules concerning the Indices , the reader will consult Table 1 , with its explanation , at the end of this ...
... natural number , and of finding the natural number corresponding to any given Logarithm , therein : like- wise for particular rules concerning the Indices , the reader will consult Table 1 , with its explanation , at the end of this ...
Página 31
... the Logarithms . * For the method of finding the natural number , answering to the sum of the Logarithms , the reader will consult Table 1 , at the end of this Treatise . 5. Required the product of 23.14 and 50.62 , by OF LOGARITHMS : 31.
... the Logarithms . * For the method of finding the natural number , answering to the sum of the Logarithms , the reader will consult Table 1 , at the end of this Treatise . 5. Required the product of 23.14 and 50.62 , by OF LOGARITHMS : 31.
Página 32
... natural number will be the Quotient required . In this operation , the Index of the Divisor must be changed from affirmative to negative , or from negative to affirmative ; and then the difference of the affirmative and negative Indices ...
... natural number will be the Quotient required . In this operation , the Index of the Divisor must be changed from affirmative to negative , or from negative to affirmative ; and then the difference of the affirmative and negative Indices ...
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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