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 ... |
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Página 23
Remember that the eye - piece inverts the image of the cress - hairs , and that
consequentiy añy movement of it , by weans of the small capstan head screws on
the outside of the telescope - barrel , should be in the direction which would
seem ...
Remember that the eye - piece inverts the image of the cress - hairs , and that
consequentiy añy movement of it , by weans of the small capstan head screws on
the outside of the telescope - barrel , should be in the direction which would
seem ...
Página 24
TO BRING THE INTERSECTION OF THE CROSS - HAIRS INTO THE OPTICAL
AXIS OF THE TELESCOPE . 1. Set the instrument firmly , cast loose the wyes ,
and , by levelling and tangent screws , bring either of the cross - hairs to coincide
...
TO BRING THE INTERSECTION OF THE CROSS - HAIRS INTO THE OPTICAL
AXIS OF THE TELESCOPE . 1. Set the instrument firmly , cast loose the wyes ,
and , by levelling and tangent screws , bring either of the cross - hairs to coincide
...
Página 25
TO BRING THE LEVEL BUBBLE PARALLEL WITH THE TELESCOPE AXIS , 5.
Clamp the instrument over either pair of levelling screws , and bring the bubble to
the middle of its tube . Turn the telescope slightly on its bearings , so that the ...
TO BRING THE LEVEL BUBBLE PARALLEL WITH THE TELESCOPE AXIS , 5.
Clamp the instrument over either pair of levelling screws , and bring the bubble to
the middle of its tube . Turn the telescope slightly on its bearings , so that the ...
Página 26
Having thus completed the principal adjustments in their proper order , bring the
telescope and its bubble - case as nearly vertical in the wye bearings as hand
and eye can make them , and by reference to a plumb - line , or the corner of a
well ...
Having thus completed the principal adjustments in their proper order , bring the
telescope and its bubble - case as nearly vertical in the wye bearings as hand
and eye can make them , and by reference to a plumb - line , or the corner of a
well ...
Página 40
Upset the telescope , and place a like mark at about the same distance , and
level in the opposite direction . Unclamp . Revolve the instrument horizontally on
its spindle half way round , and direct the cross - hair to the point first observed .
Upset the telescope , and place a like mark at about the same distance , and
level in the opposite direction . Unclamp . Revolve the instrument horizontally on
its spindle half way round , and direct the cross - hair to the point first observed .
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Términos y frases comunes
4º curve A. D. Min added adjustment angle base called central angle centre CHORD column correct corresponding Cosine Cotang Cube curve decimal deflection degree of curvature difference direction dist distance divided elevation engineer equal error Example feet field figure fixed follows frog functions gauge given gives grade ground half height Hence inches intersection length located logarithm mark means measure method middle minutes Move multiplied natural observation opposite outer parallel practice quotient radii radius rail range record reference remaining Roots rule screws side Sine slope Square stake straight Subtract Suppose switch-rail Table Table XVI tabular taken Tang tangent telescope terminal tion track triangle turn turnout 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...
Información bibliográfica
| Título | 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 ... |
| Autor | William Findlay Shunk |
| Edición | 14 |
| Editor | D. Van Nostrand Company, 1890 |
| Procedencia del original | Universidad de California |
| Digitalizado | 30 Nov. 2006 |
| Largo | 339 páginas |
| Exportar cita | BiBTeX EndNote RefMan |