A Manuel of the Principal Instruments Used in American Engineering and Surveying
Author : Gurley (Firm)
Publisher :
Page : 370 pages
File Size : 29,54 MB
Release : 1914
Category : Surveying
ISBN :
Author : Gurley (Firm)
Publisher :
Page : 370 pages
File Size : 29,54 MB
Release : 1914
Category : Surveying
ISBN :
Author : W. & L.E. Gurley
Publisher :
Page : 552 pages
File Size : 15,17 MB
Release : 1912
Category : Surveying
ISBN :
Author : W. & L. E. Gurley
Publisher : Theclassics.Us
Page : 94 pages
File Size : 16,18 MB
Release : 2013-09
Category :
ISBN : 9781230859743
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ...handles are of brass and form part of the end links, to which they are connected by a short Handles, link and jam-nuts, by which also the length of the chain is adjusted. The tallies are of brass, and have one, two, three or four notches, as they mark ten, twenty, thirty or Tallies, forty links from either end. The fiftieth link is marked by a rounded tally to distinguish it from the others. In place of the four-pole chain just described, many surveyors prefer a chain two rods or Half-chains. thirty-three feet long, and having only fifty links, which are counted by tallies from one end in a single direction. Our surveyors' chains are made of Nos. 8 and 10 reIron And Steel nned iron wire, and of Nos. 8, 10, 12 Wire. and 15 best steel wire. Steel chains, though more costly than those of iron, are often preferred on account of their greater strength. Engineers' chains differ from surveyors' chains, in that Engineers' a '" including a ring at each end is Chains. one foot long, and the wire is of steel and therefore much stronger. They are either fifty or one hundred feet long, and are furnished with swivel handles and tallies like those just described. The wire used for these chains is of steel, Nos. 8, 10 and 12 of the first quality. A very light and strong chain is made of No. 12 steel Brazed Steel w're. tne links and rings of which are Chains. securely brazed. The wire is of a low spring-temper, and the chain though light, is almost incapable of being either broken or stretched in ordinary use. Our brazed steel chains have been found exceedingly desirable for all kinds of measurement, and for the use of engineers upon railroads and canals they have almost entirely superseded the heavier chains. We often make chains with steel snaps in...
Author : Library of Congress
Publisher :
Page : 712 pages
File Size : 32,36 MB
Release : 1972
Category : Catalogs, Union
ISBN :
Author : W. & L.E. Gurley
Publisher :
Page : 458 pages
File Size : 21,58 MB
Release : 1902
Category : Surveying
ISBN :
Author :
Publisher :
Page : 79 pages
File Size : 13,68 MB
Release : 1855
Category : Drawing materials
ISBN :
Author : W. & L. E. Gurley
Publisher : Rarebooksclub.com
Page : 46 pages
File Size : 19,87 MB
Release : 2013-09
Category :
ISBN : 9781230133553
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ...and used with a pair of handles with compensation scale for variations of temperature, for chain measurements. These tapes are U. S. standard measure at 62 Fahrenheit, with about twelve pounds strain. A hundred-foot tape expands.0756 inch for each 10 rise in temperature. The tapes are wound in a leather or metal case with folding handle. See Nos. 800 to 835 of the Price List. Our Excelsior steel tape is well liked for use in mines. It is one-half inch wide, and is mounted on an open brass frame with folding handle. The tape is easily wound and unwound, and the open frame allows the evaporation of moisture. See Nos. 850 to 859B of the Price List. METRIC AND VARA TAPES We can furnish any of our metallic tapes, Nos. 780 to 794, and steel tapes, Nos. 820 to 835, with metric or vara measure on the reverse side instead of links, at extra prices, as quoted on pages 294 and 29,6; and with metric or vara measure only, at prices of regular styles of the same length in feet. Our chain tapes, Nos. 760 to 772, are also graduated with metric measure only, when so ordered, and are marked at each meter, with the first and last meter in decimeters. If graduated with vara measure only, they are marked at each vara, with the first and last vara in tenths. INFORMATION TO PURCHASERS HE Plain Compass will answer for original surveys, or for ascertaining the bearing of lines in the preparation of county maps. The Vernier Compass, or Vernier Transit Compass, will be required where allowance must be made for the magnetic declination, as in retracing the lines of an old survey. When local attraction must be taken into account, in addition to the magnetic declination, and angles must be taken independently of the needle, an instrument with a graduated limb must be...
Author :
Publisher :
Page : 2188 pages
File Size : 25,13 MB
Release : 1924
Category : American literature
ISBN :
Author : W. And L. E. Gurley
Publisher : Forgotten Books
Page : 480 pages
File Size : 14,25 MB
Release : 2016-09-08
Category : Technology & Engineering
ISBN : 9781333510329
Excerpt from A Manual of the Principal Instruments Used in American Engineering and Surveying, Manufactured by W. And L. E. Gurley BY focus at the cross telescope wires, and there forms a minute, inverted image, which may be seen by placing a piece of ground glass at that point to receive it. The eyepiece magnifies this image, restores it to its natural position and conveys it to the eye. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author : John Butler Johnson
Publisher :
Page : 816 pages
File Size : 15,16 MB
Release : 1886
Category : Surveying
ISBN :