The Field Engineer: A Handy Book of Practice in the Survey, Location, and Track-work of Railroads; Containing a Large Collection of Rules and Tables, Original and Selected Applicable to Both the Standard and the Narrow Gauge ...D. Van Nostrand Company, 1908 - 345 páginas |
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Página ix
... and the denominator the root . B. M. Bench - mark ; any fixed reference point for the level , ix as outcropping ledge , water - table of building , Radii and their logarithms, middle ordinates, and deflection distances 155.
... and the denominator the root . B. M. Bench - mark ; any fixed reference point for the level , ix as outcropping ledge , water - table of building , Radii and their logarithms, middle ordinates, and deflection distances 155.
Página x
... distance : i.e. , the distance from the P. I. to the point where a curve merges in the tangent . P. C. Point of curve : the stake - mark at the beginning of a curve . P. T. Point of tangent : the stake - mark at the end of a curve ...
... distance : i.e. , the distance from the P. I. to the point where a curve merges in the tangent . P. C. Point of curve : the stake - mark at the beginning of a curve . P. T. Point of tangent : the stake - mark at the end of a curve ...
Página 11
... distance from one extremity of the arc enclosing it , to the diameter , through the other extrem- ity . Thus PM is the sine of the angle M O A. The cosine of an angle is the sine of the complement of the angle . Thus N M = OP is the ...
... distance from one extremity of the arc enclosing it , to the diameter , through the other extrem- ity . Thus PM is the sine of the angle M O A. The cosine of an angle is the sine of the complement of the angle . Thus N M = OP is the ...
Página 28
... distance of several hundred feet ; the leveller is thus enabled to take intermediate elevations rapidly , and , when ... distance . Calling the required correction A , for any given distance D , then A : .000215 X D2 if D is in ...
... distance of several hundred feet ; the leveller is thus enabled to take intermediate elevations rapidly , and , when ... distance . Calling the required correction A , for any given distance D , then A : .000215 X D2 if D is in ...
Página 29
... distances at sea . The Peak of Teneriffe , for example , 16,000 feet high , should be just visible from the sea - level at a distance = √16000 ÷ 0.6 = say 163 miles . 10. TO FIND DIFFERENCES IN ELEVATION BY MEANS OF THE BAROMETER ...
... distances at sea . The Peak of Teneriffe , for example , 16,000 feet high , should be just visible from the sea - level at a distance = √16000 ÷ 0.6 = say 163 miles . 10. TO FIND DIFFERENCES IN ELEVATION BY MEANS OF THE BAROMETER ...
Términos y frases comunes
A. D. MIN adjustment apex distance backsight called central angle CHORD column cosec Cosine 1 Sine cross-hair Cube Roots cubic DATARIO decimal deflection distance degree of curvature degree of curve Diff divided elevation equal equivalent Example feet long figure fixed foregoing formation slope frog angle gauge of track gauge side given angle grade ground inches index angle instrument height intersection angle located logarithm M.
M. I Sine Main frog dist mantissa mark measure method metres middle ordinate minutes multiply number corresponding observation opposite outer rail perpendicular plane triangle quotient radii radius range REVERSED CURVE Sine 1 Cotang Square Roots standard gauge sub-chord Subtract Suppose switch-rail Table XVI tabular tance Tang tangential angle tangential distance telescope terminal tangent tion toe of switch Trigonometry turnout curve vernier vertical ΙΟ
Pasajes populares
Página 4 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Página 4 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers. log» MN = log» M + log
Página 13 - If the arc, or angle, is less than 45°, look for the degrees at the top of the page, and for the minutes in the...
Página 17 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Página 3 - THE LOGARITHM: of a number is the exponent of the power to which it is necessary to raise a fixed number, to produce the given number.
Página 15 - Is to the sum of the other two sides, So is the difference of those sides To the difference of the segments of the base.
Página 15 - AC, (Fig. 25.) is to their difference ; as the tangent of half the sum of the angles ACB and ABC, to the tangent of half their difference.
Página 13 - If the angle is greater than 45°, look for the degrees at the bottom of the page, and for the minutes in the right-hand column ; then follow the corresponding...
Página 15 - In any plane triangle, as twice the rectangle under any two sides is to the difference of the sum of the squares of those two sides and the square of the base, so is the radius to the cosine of the angle contained by the two sides.
Página 11 - The operation of finding the unknown parts is called the solution of the triangle. 2. A plane angle is measured by the arc of a circle included between its sides; the centre of the circle being at the vertex, and its radius being 1. The circle, for convenience, is divided into 360 equal parts called degrees; 90 of these parts are included in a quadrant, which includes one-quarter of the circle, and is the measure of a right angle. Each degree is further divided into 00 equal parts called minutes,...