A Treatise of Practical Surveying: Which is Demonstrated from Its First Principles ... |
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Σελίδα 157
... for an object to take your view to : then having placed your instrument
horizontally ( which is easily done by turning the box so that the ends of the
needle may be equidistant from its bottom , and it traverses or plays freely ) turn
the flower - de ...
... for an object to take your view to : then having placed your instrument
horizontally ( which is easily done by turning the box so that the ends of the
needle may be equidistant from its bottom , and it traverses or plays freely ) turn
the flower - de ...
Σελίδα 161
If your needle be pointed at each end , in taking fore - sights , you may turn the
north part of the box to your eye , and count your degrees to the south part of the
needle , as before ; or you may turn the south of the box to your eye , and count ...
If your needle be pointed at each end , in taking fore - sights , you may turn the
north part of the box to your eye , and count your degrees to the south part of the
needle , as before ; or you may turn the south of the box to your eye , and count ...
Σελίδα 167
At the second , or next station , unscrew the instrument , and set the south of the
index to the degree of the last station ; turn the whole about , with the south of the
index to you , and cut the object at the foregoing station ; screw the instrument ...
At the second , or next station , unscrew the instrument , and set the south of the
index to the degree of the last station ; turn the whole about , with the south of the
index to you , and cut the object at the foregoing station ; screw the instrument ...
Σελίδα 170
Having placed the instrument at the first station turn it about till the north end of
the needle be over the meridian , or flower - de - luce of the box , and there screw
it fast . Assign any convenient point , to which apply the edge of the index , so ...
Having placed the instrument at the first station turn it about till the north end of
the needle be over the meridian , or flower - de - luce of the box , and there screw
it fast . Assign any convenient point , to which apply the edge of the index , so ...
Σελίδα 177
Pitch upon any convenient point on your paper for your first station , as at 1 , on
which lay the centre - hole of your protractor , with a protractingpin ; then if the
degrees be less that 180 , turn the arc of your protractor downwards , or towards
the ...
Pitch upon any convenient point on your paper for your first station , as at 1 , on
which lay the centre - hole of your protractor , with a protractingpin ; then if the
degrees be less that 180 , turn the arc of your protractor downwards , or towards
the ...
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 |