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

### Dentro del libro

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Página 118

To find the height of a perpendicular object , on an horizontal plane ; by having

the

let that be set perpendicular , by the help of a quadrant , thus ; apply the side of

the ...

To find the height of a perpendicular object , on an horizontal plane ; by having

the

**length**of the shadow given . Provide a rod , or staff , whose**length**is given ,let that be set perpendicular , by the help of a quadrant , thus ; apply the side of

the ...

Página 137

THE stationary distance , or mearings of ground , of four poles or perches , which

consist of 100 links ; ( and this is the most natural division ) or by one of 50 links ,

which contains two poles or perches : but because the

THE stationary distance , or mearings of ground , of four poles or perches , which

consist of 100 links ; ( and this is the most natural division ) or by one of 50 links ,

which contains two poles or perches : but because the

**length**of a perch differs ... Página 139

1 rings are apt to be open by frequent using it , and its

, so that no one can be too circumspect in this point . In measuring a stationary

distance , there is an object fixed in the extreme point of the line to be measured ...

1 rings are apt to be open by frequent using it , and its

**length**is thereby increased, so that no one can be too circumspect in this point . In measuring a stationary

distance , there is an object fixed in the extreme point of the line to be measured ...

Página 251

... they will fit in with each other as indentures do ; and after this manner they are

easily connected : measure then the

maps , and , the

... they will fit in with each other as indentures do ; and after this manner they are

easily connected : measure then the

**length**and breadth of the entire connectedmaps , and , the

**length**and breadth of the parchment or paper you are confined ... Página 294

The perambulator , or surveying wheel , is so contrived as to turn just twice in the

Two sides of a triangle are respectively 20 and 40 perches ; required the third so

...

The perambulator , or surveying wheel , is so contrived as to turn just twice in the

**length**of a pole or 16 } feet ; what then is the diameter ? Answ . 2.626 feet . 2.Two sides of a triangle are respectively 20 and 40 perches ; required the third so

...

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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.