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, ...
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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...
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
Very good Good. Leather binding. Top board has separated completely and cleanly. Light foxing to text. Tight binding. Some math problems worked in pencil on endpapers. 188pp. Plus 188pp. Math tables Plus 5 foldout plates.
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Seller's Description:
Good. 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.
