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

### Dentro del libro

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Página 154

that of the inch , which is diagonally

should be accurately laid down ; or if two inches were thus

would be the more exact ; for it is by no means necessary that the angles should

...

that of the inch , which is diagonally

**divided**into 100 parts , in order that the angleshould be accurately laid down ; or if two inches were thus

**divided**for angles , itwould be the more exact ; for it is by no means necessary that the angles should

...

Página 169

The outside of the frame is

parallels or squares on the paper , or for shifting it , when occasion serves . The

inside of the frame is

...

The outside of the frame is

**divided**into inches and tenths , which serve for rulingparallels or squares on the paper , or for shifting it , when occasion serves . The

inside of the frame is

**divided**into 360 degrees , which , though unequal on it , yet...

Página 182

... or content in perches , being

remaining perches , if more than 40 , being

and the last remainder , if any , will be perches . Or thus : 2. Square the side in

four ...

... or content in perches , being

**divided**by 160 , will give the content in acres ; theremaining perches , if more than 40 , being

**divided**by 40 , will give the roods ,and the last remainder , if any , will be perches . Or thus : 2. Square the side in

four ...

Página 206

4142.57 This being

map . Let your map be laid down by the largest scale your paper will admit , for

then the bases and perpendiculars can be measured with great accuracy than ...

4142.57 This being

**divided**by 160 , will give 25A . 3R . 22P . the content of themap . Let your map be laid down by the largest scale your paper will admit , for

then the bases and perpendiculars can be measured with great accuracy than ...

Página 274

As HI happens to be a meridian , the area of HOMH

quotes HM ( 43.33 ) without finding the area of HOIH , as we did of ICDI in

example 2d . and HM — HV = VM = 8.03 = diff . lat . of OM , which with its dep .

VO = 38.2 ...

As HI happens to be a meridian , the area of HOMH

**divided**by half OV ( 19.1 )quotes HM ( 43.33 ) without finding the area of HOIH , as we did of ICDI in

example 2d . and HM — HV = VM = 8.03 = diff . lat . of OM , which with its dep .

VO = 38.2 ...

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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.