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

### Dentro del libro

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Página 5

THE THE word Geometry imports no more than to

dimensions . It is generally supposed to have had its rise among the Egyptians ,

from ...

THE THE word Geometry imports no more than to

**measure**the earth , or to**measure**land ; yet in a larger and more proper sense , it is applied to all sorts ofdimensions . It is generally supposed to have had its rise among the Egyptians ,

from ...

Página 28

The

point , and contained between the two lines that form the angle : thus the angle

HCB ( fig . 8. ) is

degrees ...

The

**measure**of a right - lined angle , is the arc of a circle swept from the angularpoint , and contained between the two lines that form the angle : thus the angle

HCB ( fig . 8. ) is

**measured**by the arc HB , and is said to contain so manydegrees ...

Página 137

There are other perches used in different parts of England , as the perch of

woodland

yards ( or the same with the plantation perch ) and the forest

which is 8 ...

There are other perches used in different parts of England , as the perch of

woodland

**measure**, which is 6 yards ; that of church - land**measure**, which is 7yards ( or the same with the plantation perch ) and the forest

**measure**perchwhich is 8 ...

Página 139

In

the line to be

foremost one by , in order that the distance may be

In

**measuring**a stationary distance , there is an object fixed in the extreme point ofthe line to be

**measured**; this is a direction for the binder chainman to govern theforemost one by , in order that the distance may be

**measured**in a right line ; for ... Página 234

25L , as well as the

by the side of your field - book in a line with the first station , say at 4C . 25L . L. IC

. 12L , that is , at 4C . 25L . there is an off - set to the left - hand of 1C . 12L .

25L , as well as the

**measure**of the off - set ad , which admit to be 1C . 12L . thus :by the side of your field - book in a line with the first station , say at 4C . 25L . L. IC

. 12L , that is , at 4C . 25L . there is an off - set to the left - hand of 1C . 12L .

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### 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.