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

### Dentro del libro

Resultados 1-5 de 5

Página 64

If from 10 , 20 , 30 , & c . the

perpendiculars , let these be transferred to the ... A .we describe the arcs 10 , 10 :

20 , 20 : 30 , 30 , & c . from every

chords .

If from 10 , 20 , 30 , & c . the

**divisions**of the quadrant BD , there be let fallperpendiculars , let these be transferred to the ... A .we describe the arcs 10 , 10 :

20 , 20 : 30 , 30 , & c . from every

**division**of the arc AD ; we shall have a line ofchords .

Página 66

... and are thus counted : every large

is i , and every one downwards is one tenth of a perch ; or sometimes thus , every

large

... and are thus counted : every large

**division**is 10 , every one of the subdivisionsis i , and every one downwards is one tenth of a perch ; or sometimes thus , every

large

**division**is called 100 , every subdivision 10 , and every one downwards ... Página 178

... on the protractor's edge will be one two - pole chain ; } a

links , and of a

of 20 perches to an inch two

...

... on the protractor's edge will be one two - pole chain ; } a

**division**will be 25links , and of a

**division**will be 12 ; links . If your map is to be laid down by a scaleof 20 perches to an inch two

**divisions**will be one twopole chain ; one**division**will...

Página 179

How many links in a

inch ? 25 8 210 ) 2010 10 links . Answer . 2. How many links in a

map a be laid down by a scale of 10 perches to an inch ? 25 10 e 210 ) 2510

12.5 ...

How many links in a

**division**, if a map be laid down by a scale of 8 perches to aninch ? 25 8 210 ) 2010 10 links . Answer . 2. How many links in a

**division**, if amap a be laid down by a scale of 10 perches to an inch ? 25 10 e 210 ) 2510

12.5 ...

Página 268

When the whole is protracted , and you are satisfied of the closes of the particular

or

When the whole is protracted , and you are satisfied of the closes of the particular

**divisions**, cast up each severally , and ... 1 , 2 , 3 , 4 , & c . in every particular fieldor

**division**; let every tenant's particular holding be distinguished by a different ...### Comentarios de la gente - Escribir un comentario

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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.