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, 1890 - 339 páginas |
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Página 40
... STRAIGHT LINE . Try , first , by reference to the corner of a well - built house , or to a plumb - line , whether the hair be truly vertical . If it is not , loosen the four small capstan head screws on the outside of the barrel ...
... STRAIGHT LINE . Try , first , by reference to the corner of a well - built house , or to a plumb - line , whether the hair be truly vertical . If it is not , loosen the four small capstan head screws on the outside of the barrel ...
Página 42
... straight edge into ten equal parts , and that on another straight edge a space equal in length to nine of these parts is divided also into ten equal parts . The sub- divisions of the latter scale will then each be nine - tenths as large ...
... straight edge into ten equal parts , and that on another straight edge a space equal in length to nine of these parts is divided also into ten equal parts . The sub- divisions of the latter scale will then each be nine - tenths as large ...
Página 52
... straight lines intersecting at D. Lay off equal distances , D A , D B ; erect perpendiculars at A and M K F H N G L B and GA or G B , the radius , R. chord of 100 feet D , as before . B , meeting at G , and con- nect A B , D G. From the ...
... straight lines intersecting at D. Lay off equal distances , D A , D B ; erect perpendiculars at A and M K F H N G L B and GA or G B , the radius , R. chord of 100 feet D , as before . B , meeting at G , and con- nect A B , D G. From the ...
Página 81
... supplied by the company , are not misused . His field equipment should always added a straight , round staff , five or six include a hand - level and a pocket - compass : to these may be SUGGESTIONS CONCERNING FIELD - WORK . 81.
... supplied by the company , are not misused . His field equipment should always added a straight , round staff , five or six include a hand - level and a pocket - compass : to these may be SUGGESTIONS CONCERNING FIELD - WORK . 81.
Página 82
... straight , round staff , five or six feet long , steel pointed ; it will be found exceedingly useful . If without a topographer , he should make sketches of irregu- lar ground , of streams , buildings , roads , and the like , to help in ...
... straight , round staff , five or six feet long , steel pointed ; it will be found exceedingly useful . If without a topographer , he should make sketches of irregu- lar ground , of streams , buildings , roads , and the like , to help in ...
Términos y frases comunes
A. D. MIN adjustment apex distance backsight called capstan central angle chord A C column Cosine 1 Sine cross-hair Cube Roots decimal deflection distance degree of curvature degree of curve divided engineer equal error Example feet figure fixed foregoing formation slope frog angle gauge of track gauge side ground Hence inches index angle instrument height intersection angle located logarithm M.
M. Sine Main frog dist mantissa mark measure method metres middle ordinate minutes multiplied natural sine number corresponding observation opposite outer rail parallel perpendicular plane triangle Polaris quotient radii radius range REVERSED CURVE rule Sine 1 Cotang Square Roots sub-chord subtended 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 18 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
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 11 - Every circumference of a. circle, whether the circle be large or small, is supposed to be divided into 360 equal parts called degrees. Each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds.
Página 11 - ... plane triangles. In every plane triangle there are six parts, — three sides and three angles. When three of these parts are given, one being a side, the remaining parts may be found by computation. The operation of finding the unknown parts is called the solution of the triangle.
Página 19 - Call the word written upon each side the name of each side ; then say, As the name of the given side, Is to the given side ; So is the name of the required side, To the required side.
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 195 - NB The minutes in the left-hand column of each page, increasing downwards, belong to the degrees at the top ; and those increasing upwards, in the right-hand column, belong to the degrees below.
Página i - SHUNK, WF 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 Narrow Gauge, and prepared with special reference to the wants of the young.
Página 19 - To find an angle. Assume one side to be radius, and mark the remaining sides as before. Then say, As the side made radius is to radius, So is the other given side to the name of that side; Which determines the opposite angle.
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...