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

### Dentro del libro

Resultados 1-5 de 5

Página 151

Mr. J. D's part of Grange bounds , or is adjacent to the surveyed

to the third station ; Mr. L. P's part of Portmarnock bounds it from the third to the

fourth station ; the strand then is the boundary from thence to the sixth , and from

...

Mr. J. D's part of Grange bounds , or is adjacent to the surveyed

**land**from the firstto the third station ; Mr. L. P's part of Portmarnock bounds it from the third to the

fourth station ; the strand then is the boundary from thence to the sixth , and from

...

Página 203

It is customary to deduct 6 acres out of 106 for roads ; the

deduction is made may be termed the gross ; and that remaining after such

deduction , the neat . RULE . The gross div . ) The neat mul . by 1.06 , $ quotes

the neat . prob ...

It is customary to deduct 6 acres out of 106 for roads ; the

**land**before thededuction is made may be termed the gross ; and that remaining after such

deduction , the neat . RULE . The gross div . ) The neat mul . by 1.06 , $ quotes

the neat . prob ...

Página 244

But in most tracts of

perhaps one fourth of them ; in this case we are under the necessity to move the

pole after we begin to lose sight of it , to some other part of the

...

But in most tracts of

**land**, one object cannot be seen from every station , or fromperhaps one fourth of them ; in this case we are under the necessity to move the

pole after we begin to lose sight of it , to some other part of the

**land**, where it may...

Página 281

Let a boat be manned out with a signal flag , a log and line , lead and line , and to

observe the bearings of any

more objects or places , as A , B , C , on the shore , from whence the boat may be

...

Let a boat be manned out with a signal flag , a log and line , lead and line , and to

observe the bearings of any

**land**- mark , a compass with sights . Take two ormore objects or places , as A , B , C , on the shore , from whence the boat may be

...

Página 282

Or two boats may lay at anchor instead of the

as before . Now , since the

laid down in the draught , as in common surveying , by plotting the distance ...

Or two boats may lay at anchor instead of the

**land**marks and then you may workas before . Now , since the

**land**- marks B and C are fixed , their position may belaid down in the draught , as in common surveying , by plotting the distance ...

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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.