This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1883 Excerpt: ... might vitiate the whole survey. No angle less than 30 or more than 120 should be used; and even such angles should not be admitted when the ...
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1883 Excerpt: ... might vitiate the whole survey. No angle less than 30 or more than 120 should be used; and even such angles should not be admitted when the locality can be so chosen as to prevent it. 245. If the triangulation is to be over a limited extent of country which has already been covered by a net-work of Primary Triangles, a side of one of these triangles should be used as a base. It is never good practice to measure a base line, when a side of a triangle of a previous survey is available; but if no such side can be obtained, then the selection of a proper site for a base-line forms one of the first objects of the preliminary reconnaissance. It should, if possible, be fixed on an open plain, free from surface encumbrance or freed from such. It must be so chosen that the surrounding signals may be distinctly seen from its extreme points; and hence those signals which mark points of the adjacent triangulation, should be selected with reference to the base. The length of the base should be suited to the magnitude of the survey. 246. In measuring a base-line, every possible precaution should be taken to insure accuracy. The line measured should be straight, to effect which it should be ranged out with the transit. The ends of the base should be marked by a stone sunk in the ground, with a copper bolt let into it and the exact point of beginning and ending fixed by the intersection of two lines cut into the head of the bolt. The measurement may be made with steel tape or rods. If a tape is used, it should be carefully drawn out each time to its standard length, and should be compared with a standard both before and after measurement, and correction made for its variation, if any, from standard. The mean of several measurements should be taken for the correct measurem...
Fair. Hardcover. 8vo-over 7¾"-9¾" tall. Full brown sheep leather binding with red label on the spie, all edges marbled, splitting of the leather at the joins, front board has been nibbled at the bottom, penciled scribblings on the front endpapers, previous owner's name in pencil on the front flyleaf. Not exlibrary. Overall in FAIR condition.
Hardcover reprint of the original 1898 edition-beautifully bound in brown cloth covers featuring titles stamped in gold, 8vo-6x9". No adjustments have been made to the original text, giving readers the full antiquarian experience. For quality purposes, all text and images are printed as black and white. This item is printed on demand. Book Information: Elements Of Surveying And Leveling. Davies, Charles. Indiana: Repressed Publishing LLC, 2012. Original Publishing: Elements Of Surveying And Leveling. Davies, Charles. New York, Cincinnati Etc. American Book Company, 1898. Subject: Surveying.
Good hardcover. Text clean with some minor pencil writing on some pages. Hinges cracked. Name inside front cover. Leather cover worn and rubbed. Corners on cover worn and bent. Chipping to spine ends. Gold gilt title on black band on spine. Comes in a green slipcase that doesn't seem to fit the book.
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