## A Treatise of Practical Surveying: Which is Demonstrated from Its First Principles ... |

### Dentro del libro

Resultados 1-5 de 5

Página 78

In which you may observe , that each page is divided into 3

last of which are minutes , and the intermediate ones contain the sines , tangents

, and secants , the upper and lower

In which you may observe , that each page is divided into 3

**columns**, the first andlast of which are minutes , and the intermediate ones contain the sines , tangents

, and secants , the upper and lower

**columns**contain degrees , the**column**of ... Página 79

Which is Demonstrated from Its First Principles ... Robert Gibson. EXAMPLE I.

Required , the sine of 36 degrees 40 minutes . Look at the head of the page for

36 degrees , and in the side

the ...

Which is Demonstrated from Its First Principles ... Robert Gibson. EXAMPLE I.

Required , the sine of 36 degrees 40 minutes . Look at the head of the page for

36 degrees , and in the side

**column**on the left hand , for 40 minutes ; then belowthe ...

Página 150

Robert Gibson. and again , the like distance from B in a direct line towards C ,

where let also another peg be left , as at e ; the distance from e to f is to be

inserted in the field - book in the second

station No.

Robert Gibson. and again , the like distance from B in a direct line towards C ,

where let also another peg be left , as at e ; the distance from e to f is to be

inserted in the field - book in the second

**column**, under angles , in a line withstation No.

Página 159

second

BC , which insert in the third

sending your object before you , till you return to the place where you began ,

and you ...

second

**column**opposite to station No. 2 ; then measure the stationary distanceBC , which insert in the third

**column**, and thus proceed from angle to angle ,sending your object before you , till you return to the place where you began ,

and you ...

Página 231

Then by looking along the

westings subtracted without altering the denomination of either . Therefore by ...

Then by looking along the

**column**of departure , it is easy to observe , that in the**columns**of easting , opposite station 9 , all the eastings may be added , and thewestings subtracted without altering the denomination of either . Therefore by ...

### Comentarios de la gente - Escribir un comentario

No encontramos ningún comentario en los lugares habituales.

### Términos y frases comunes

acres angle Answer base bearing called centre chains chord circle Co-sec Co-sine Co-tang column contained decimal difference direct distance divided division draw drawn east edge equal EXAMPLE feet field field-book figures four four-pole fourth give given greater ground half height Hence inches laid land Lat Dep length less logarithm manner measure method multiplied needle object observe opposite parallel perches perpendicular plain plane Plate pole prob PROBLEM proportion quantity quotient radius reduce remainder right angles right line root scale Secant sect side sights sine square station suppose survey taken Tang tangent theo THEOREM third triangle triangle ABC true turn variation whence whole

### Pasajes populares

Página 25 - 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.

Página 207 - ... that triangles on the same base and between the same parallels are equal...

Página 40 - 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.

Página 43 - Triangles upon equal bases, and between the same parallels, are equal to one another.

Página 103 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.

Página 31 - Figures which consist of more than four sides are called polygons ; if the sides are all equal to each other, they are called regular polygons. They sometimes are named from the number of. their sides, as a five-sided figure is called a pentagon, one of six sides a hexagon, &"c.

Página 31 - ... they are called regular polygons. They sometimes are named from the number of their sides, as a five-sided figure is called a pentagon, one of. six sides a hexagon, &c. but if their sides are not equal to each other, then they are called irregular polygons, as an irregular pentagon, hexagon, &c.

Página 45 - The hypothenuse of a right-angled triangle may be found by having the other two sides ; thus, the square root of the sum of the squares of the base and perpendicular, will be the hypothenuse. Cor. 2. Having the hypothenuse and one side given to find the other; the square root of the difference of the squares of the hypothenuse and given side will be the required side.

Página 265 - As the length of the whole line, Is to 57.3 Degrees,* So is the said distance, To the difference of Variation required. EXAMPLE. Suppose it be required to run a line which some years ago bore N. 45°.

Página 32 - Things that are equal to one and the same thing are equal to one another." " If equals be added to equals, the wholes are equal." " If equals be taken from equals, the remainders are equal.