The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skillful Practice of this ArtE. Duyckinck, 1821 - 544 σελίδες |
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Σελίδα
... Natural Sines 71 Points of the Compass 82 Traverse Table 83 Mean Refraction 174 cally considered Sun's Parallax and demonstra- Dip of the Horizon 175 ted 271 Dip for Dif . Dist . of land 4. Of Off - sets 5. Method of survey- ing by ...
... Natural Sines 71 Points of the Compass 82 Traverse Table 83 Mean Refraction 174 cally considered Sun's Parallax and demonstra- Dip of the Horizon 175 ted 271 Dip for Dif . Dist . of land 4. Of Off - sets 5. Method of survey- ing by ...
Σελίδα 27
... natural numbers , therefore by assuming xoa , then by squaring x o = a2 hence a2a , 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 xoa , then by squaring x o = a2 hence a2a , 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 ...
Σελίδα 33
... natural number , and of finding the natural number corres- ponding to any given Logarithm , therein : likewise for particular rules concerning the Indices , the read- er will consult Table 1 , with its explanation , at the end of this ...
... natural number , and of finding the natural number corres- ponding to any given Logarithm , therein : likewise for particular rules concerning the Indices , the read- er will consult Table 1 , with its explanation , at the end of this ...
Σελίδα 40
... natural number is the power required . When a negative Index is thus multiplied , its product is negative , but what was carried from the decimal part of the Logarithm must be affirma- tive ; consequently the difference is the index of ...
... natural number is the power required . When a negative Index is thus multiplied , its product is negative , but what was carried from the decimal part of the Logarithm must be affirma- tive ; consequently the difference is the index of ...
Σελίδα 41
... natural number is the root required . When the index of the Logarithm to be divid- ed , is negative , and does not exactly contain the divisor without some remainder , increase the index by such a number , as will make it exactly divisi ...
... natural number is the root required . When the index of the Logarithm to be divid- ed , is negative , and does not exactly contain the divisor without some remainder , increase the index by such a number , as will make it exactly divisi ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD acres altitude Answer arch base bearing centre chains and links circle circumferentor Co-sec Co-tang column compasses contained cube root decimal diagonal difference of latitude Dist divided divisions divisor draw east Ecliptic edge EXAMPLE feet field-book figure four-pole chains geometrical series given angle given number half the sum height Hence Horizon glass hypothenuse inches instrument length Logarithms measure meridian distance multiplied Natural Co-sines natural number natural sine Nonius number of degrees object observed off-sets opposite parallelogram perches perpendicular plane pole PROB proportional protractor Quadrant quotient radius rhombus right angles right line screw Secant sect semicircle side square root station subtract survey taken tance Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
Δημοφιλή αποσπάσματα
Σελίδα 246 - ... that triangles on the same base and between the same parallels are equal...
Σελίδα 58 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 231 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 45 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Σελίδα 14 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.
Σελίδα 5 - His method is founded on these three considerations: 1st, that the sum of the logarithms of any two numbers is the logarithm of the product of...
Σελίδα 91 - ... scale. Given the length of the sine, tangent, or secant of any degrees, to find the length of the radius to that sine, tangent, or secant.
Σελίδα 35 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Σελίδα 30 - Then, because the sum of the logarithms of numbers, gives the logarithm of their product ; and the difference of the logarithms, gives the logarithm of the quotient of the numbers ; from the above two logarithms, and the logarithm of 10, which is 1, we may obtain a great many logarithms, as in the following examples : EXAMPLE 3.
Σελίδα 211 - At 170 feet distance from the bottom of a tower, the angle of its elevation was found to be 52° 30' : required the altitude of the tower ? Ans.