A Treatise of Practical Surveying: Which is Demonstrated from Its First Principles ... |
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Página 143
Or roads may be measured by a chain more accurately : for 80 four - pole , 160
two - pole chains , or 320 perches , make a mile as before : and if roads are
measured by a statute chain , it will give you the miles English , but if by a
plantation ...
Or roads may be measured by a chain more accurately : for 80 four - pole , 160
two - pole chains , or 320 perches , make a mile as before : and if roads are
measured by a statute chain , it will give you the miles English , but if by a
plantation ...
Página 144
37 of two - pole chains , how many four - pole ones ? Ch . Answer 8 . L. 37 . But if
the number of chains be odd , take the half of them for chains , and add 50 to the
links , and they will be four - pole chains and links , thus , Ch . L. 2. In 17.
37 of two - pole chains , how many four - pole ones ? Ch . Answer 8 . L. 37 . But if
the number of chains be odd , take the half of them for chains , and add 50 to the
links , and they will be four - pole chains and links , thus , Ch . L. 2. In 17.
Página 145
82 of four - pole chains , how many 2. 50 two - pole ones ? 17. 32 Answer .
PROBLEM III . To reduce four - pole chains and links , to perches and decimals of
a perch . The links of a four - pole chain are decimal parts of it , each link before
the ...
82 of four - pole chains , how many 2. 50 two - pole ones ? 17. 32 Answer .
PROBLEM III . To reduce four - pole chains and links , to perches and decimals of
a perch . The links of a four - pole chain are decimal parts of it , each link before
the ...
Página 147
To reduce perches and decimals of a perch , to two - pole chains and links . The
perches may be reduced to four - pole chains ( by the last ) and from thence to
two - pole chains ( by prob . 2. ) or , Divide the whole number by 2 , the quotient
will ...
To reduce perches and decimals of a perch , to two - pole chains and links . The
perches may be reduced to four - pole chains ( by the last ) and from thence to
two - pole chains ( by prob . 2. ) or , Divide the whole number by 2 , the quotient
will ...
Página 148
plied by the feet in a four - pole chain , will give the feet and decimals of a foot .
Thus , Ch . L. In 17. 21. of two - pole chains , how many feet ? Ch . L. 8. 71 of four
- pole chains . 66 feet Fl chain . 5226 . Feet 5226 Answer 574 . Inches 101 .
plied by the feet in a four - pole chain , will give the feet and decimals of a foot .
Thus , Ch . L. In 17. 21. of two - pole chains , how many feet ? Ch . L. 8. 71 of four
- pole chains . 66 feet Fl chain . 5226 . Feet 5226 Answer 574 . Inches 101 .
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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.