A Treatise of Practical Surveying: Which is Demonstrated from Its First Principles ... |
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Σελίδα 153
Let a mark be fixed at any point in the ground , as at H , from whence all the
angles can be seen ; let the measures of the lines HA , HB , HC , & c . be taken to
every angle of the field from the point H ; and let those be placed opposite to No.
Let a mark be fixed at any point in the ground , as at H , from whence all the
angles can be seen ; let the measures of the lines HA , HB , HC , & c . be taken to
every angle of the field from the point H ; and let those be placed opposite to No.
Σελίδα 160
... to go back to the foregoing station , to oversee the chaining , and by this means
to walk three times over every line , which is a slavery not to be borne . Or a back
and a fore - sight may be taken at one station , thus ; with the south of the box to ...
... to go back to the foregoing station , to oversee the chaining , and by this means
to walk three times over every line , which is a slavery not to be borne . Or a back
and a fore - sight may be taken at one station , thus ; with the south of the box to ...
Σελίδα 242
there be taken bBAGFeb , the remainder will be the map ABCDEFGA . As before
half the sum of Bb , and Cc multiplied by bc , will be the area of the trapezium
bBCC ; after the same manner , half the sum of Cc , and Dd , multiplied by cd , will
...
there be taken bBAGFeb , the remainder will be the map ABCDEFGA . As before
half the sum of Bb , and Cc multiplied by bc , will be the area of the trapezium
bBCC ; after the same manner , half the sum of Cc , and Dd , multiplied by cd , will
...
Σελίδα 243
In your protraction as you proceed , let every intersection be laid off from the
respective stations from whence they were taken , and let these lines be
continued ; if they all converge or meet in one point , we thence conclude all is
right , so far as ...
In your protraction as you proceed , let every intersection be laid off from the
respective stations from whence they were taken , and let these lines be
continued ; if they all converge or meet in one point , we thence conclude all is
right , so far as ...
Σελίδα 244
When we here speak of stations , we do not mean such as are usually taken at
every particular angle of the field : for it is to be apprehended , that every skilful
surveyor , particularly such who use calculation , will take the longest distances ...
When we here speak of stations , we do not mean such as are usually taken at
every particular angle of the field : for it is to be apprehended , that every skilful
surveyor , particularly such who use calculation , will take the longest distances ...
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 |