Methods of Location Or Modes of Describing And Adjusting Railway Curves And Ta
Methods of Location Or Modes of Describing And Adjusting Railway Curves And Ta
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In our eReader you can find the full English version of the book. Read Methods of Location Or Modes of Describing And Adjusting Railway Curves And Ta Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Methods of Location Or Modes of Describing And Adjusting Railway Curves And Ta
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When the intersection of two lines AB and CD, Fig. 4th, are inaccessible. Place the instru- ment over B, set the index to Zero, and take a back sight to A, then reverse the Telescope, turn the rack and take sight upon C ; screw the rack fast, and the instru- ment to C ; take a back sight from C to B : again reverse the Telescope and turn the rack till the sight falls upon D. The index will then show the required angle. CASE 3d. When the ground is so encumbered that no part of CD can be seen fro...m AB. Take a point E, Fig. 5th, from which both lines may be seen, and deflect from AB to BE in the same manner, as from AB to BC in the last case, then remove to E, and continue the process by deflecting from BE to EC, and so on, until the instrument is brought into the position CD, the index will then show the angle as before.
Fig-. 7 METHODS OF LOCATION, &C. 13 PROPOSITION IV.
To run a Line from a given Point, parallel to a given line.
LET C, Fig. 6th and 7th, be the point, and AB the given line, set the instrument at B and proceed as di- rected in the second and third cases of the last propo- sition until arriving at C, then turn the index back to Zero and the glass will then be in the line CF parallel to AB.
What to read after Methods of Location Or Modes of Describing And Adjusting Railway Curves And Ta?
You can find similar books in the "Read Also" column, or choose other free books by Samuel W Samuel Wright Mifflin to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
When the intersection of two lines AB and CD, Fig. 4th, are inaccessible. Place the instru- ment over B, set the index to Zero, and take a back sight to A, then reverse the Telescope, turn the rack and take sight upon C ; screw the rack fast, and the instru- ment to C ; take a back sight from C to B : again reverse the Telescope and turn the rack till the sight falls upon D. The index will then show the required angle. CASE 3d. When the ground is so encumbered that no part of CD can be seen fro...m AB. Take a point E, Fig. 5th, from which both lines may be seen, and deflect from AB to BE in the same manner, as from AB to BC in the last case, then remove to E, and continue the process by deflecting from BE to EC, and so on, until the instrument is brought into the position CD, the index will then show the angle as before.
Fig-. 7 METHODS OF LOCATION, &C. 13 PROPOSITION IV.
To run a Line from a given Point, parallel to a given line.
LET C, Fig. 6th and 7th, be the point, and AB the given line, set the instrument at B and proceed as di- rected in the second and third cases of the last propo- sition until arriving at C, then turn the index back to Zero and the glass will then be in the line CF parallel to AB.
What to read after Methods of Location Or Modes of Describing And Adjusting Railway Curves And Ta?
You can find similar books in the "Read Also" column, or choose other free books by Samuel W Samuel Wright Mifflin to read onlineMoreLess
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