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

### Dentro del libro

Resultados 1-5 de 5

Página 20

The double of the first figure in the quotient being 10 , is then sei as a divisor 10

48 , all the figures in the resolvend but the last ; and finding it to be

times , we annex the 4 to the divisor and quotient ; the then divisor , 104 , is ...

The double of the first figure in the quotient being 10 , is then sei as a divisor 10

48 , all the figures in the resolvend but the last ; and finding it to be

**contained**4times , we annex the 4 to the divisor and quotient ; the then divisor , 104 , is ...

Página 28

The measure of a right - lined angle , is the arc of a circle swept from the angular

point , and

HCB ( fig . 8. ) is measured by the arc HB , and is said to

degrees ...

The measure of a right - lined angle , is the arc of a circle swept from the angular

point , and

**contained**between the two lines that form the angle : thus the angleHCB ( fig . 8. ) is measured by the arc HB , and is said to

**contain**so manydegrees ...

Página 162

This is the manner of taking field notes , whereby the content of ground may be

universally determined by calculation ; and they are said to be taken by the

quartered compass , or by the four nineties . To find the number of degrees

This is the manner of taking field notes , whereby the content of ground may be

universally determined by calculation ; and they are said to be taken by the

quartered compass , or by the four nineties . To find the number of degrees

**contained**in ... Página 180

upon the line ; then prick off the number of degrees

and draw a line from the first point through the point at the degrees ; upon which

lay the stationary distance . Let this line be lengthened forwards and backwards ...

upon the line ; then prick off the number of degrees

**contained**in the given angle ,and draw a line from the first point through the point at the degrees ; upon which

lay the stationary distance . Let this line be lengthened forwards and backwards ...

Página 250

By the methods here laid down I have reduced a map from a scale of 40 to one of

20 perches to an inch , which

224 separate divisions , without the least confusion from the lines ; for none ...

By the methods here laid down I have reduced a map from a scale of 40 to one of

20 perches to an inch , which

**contained**upwards of 1200 acres , and consisted of224 separate divisions , without the least confusion from the lines ; for none ...

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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.