## 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 ... |

### Dentro del libro

Página 12

Arcs greater than

they seldom occur in field practice , and that any young engineer , conversant

with the methods herein given , will , it is presumed , have no difficulty in bandling

...

Arcs greater than

**half**a circle are not treated in this book , for the reasons thatthey seldom occur in field practice , and that any young engineer , conversant

with the methods herein given , will , it is presumed , have no difficulty in bandling

...

Página 15

In any plane triangle , as the sum of the sides about the vertical angle is to their

difference , so is the tangent of

tangent of

In any plane triangle , as the sum of the sides about the vertical angle is to their

difference , so is the tangent of

**half**the sum of the angles at the base to thetangent of

**half**their difference . 4. In any plane triangle , as the cosine of**half**the ... Página 17

Then , by proposition 3 , - As the sum of the given sides is to their difference , So

is the tangent of

difference .

will ...

Then , by proposition 3 , - As the sum of the given sides is to their difference , So

is the tangent of

**half**the sum of the remaining angles to the tangent of**half**theirdifference .

**Half**the sum of the remaining angles added to**half**their differencewill ...

Página 18

diminished by it gives the less ; thus , by means of the perpendicular from the

vertical angle , the original triangle is divided into two , each of which falls under

the ...

**Half**the base added to**half**the said difference gives the greater segment , anddiminished by it gives the less ; thus , by means of the perpendicular from the

vertical angle , the original triangle is divided into two , each of which falls under

the ...

Página 24

Gently rotate the telescope

selected for treatment then fails to coincide with the object , reduce the error one -

telescope ...

Gently rotate the telescope

**half**- way around in the wyes . If the cross - hairselected for treatment then fails to coincide with the object , reduce the error one -

**half**by means of the small capstan head screws at right angles to it on thetelescope ...

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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...