A Treatise of Practical Surveying: Which is Demonstrated from Its First Principles ... |
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Σελίδα 149
Let ABCDEFG be a piece of ground to be surveyed : beginning at the point A , let
one chain be laid in a direct line from A , towards G , where let a peg be left , as at
c ; and again , the like distance from A in a direct line towards B , where ...
Let ABCDEFG be a piece of ground to be surveyed : beginning at the point A , let
one chain be laid in a direct line from A , towards G , where let a peg be left , as at
c ; and again , the like distance from A in a direct line towards B , where ...
Σελίδα 166
The circumferentor box may be taken off . Direct the sights to the object at the
second station , and the degree cut by the opposite end of the index will be the
bearing of that line from the north , and the same that the circumferentor would
give .
The circumferentor box may be taken off . Direct the sights to the object at the
second station , and the degree cut by the opposite end of the index will be the
bearing of that line from the north , and the same that the circumferentor would
give .
Σελίδα 286
and find the middle between A and B , which suppose to be C ; plant the
instrument at C : direct the tube to a station - staff , held up at A , and elevate or
depress the tube , till the bubble is exactly in the middle of the divisions ; then by
signals ...
and find the middle between A and B , which suppose to be C ; plant the
instrument at C : direct the tube to a station - staff , held up at A , and elevate or
depress the tube , till the bubble is exactly in the middle of the divisions ; then by
signals ...
Σελίδα 287
Now direct the telescope to the staff at B , level it , and direct your assistant to
move the vane , till the hair cuts the middle thereof ; and then , if the upper edge
of the vane cuts the foregoing sum 6 feet 9 inches , the hair and bubble are truly ...
Now direct the telescope to the staff at B , level it , and direct your assistant to
move the vane , till the hair cuts the middle thereof ; and then , if the upper edge
of the vane cuts the foregoing sum 6 feet 9 inches , the hair and bubble are truly ...
Σελίδα 289
where A every where represents the level , and B the station staves ; and
suppose the route be made from a to e ; first plant the instrument between the
staves a and b ; at A direct the level to a B , bring the bubble to the middie of the
divisions ...
where A every where represents the level , and B the station staves ; and
suppose the route be made from a to e ; first plant the instrument between the
staves a and b ; at A direct the level to a B , bring the bubble to the middie of the
divisions ...
Τι λένε οι χρήστες - Σύνταξη κριτικής
Δεν εντοπίσαμε κριτικές στις συνήθεις τοποθεσίες.
Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 207 - ... that triangles on the same base and between the same parallels are equal...
Σελίδα 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.
Σελίδα 43 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Σελίδα 103 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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°.
Σελίδα 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.
Πληροφορίες βιβλιογραφίας
| Τίτλος | A Treatise of Practical Surveying: Which is Demonstrated from Its First Principles ... |
| Συγγραφέας | Robert Gibson |
| Έκδοση | 3 |
| Εκδότης | Lewis Nichols, 1806 |
| Πρωτότυπο από | το Πανεπιστήμιο του Μίτσιγκαν |
| Ψηφιοποιήθηκε στις | 26 Μάιος 2007 |
| Μέγεθος | 452 σελίδες |
| Εξαγωγή αναφοράς | BiBTeX EndNote RefMan |