A Treatise on Roads: Wherein the Principles on which Roads Should be Made are Explained and Illustrated, by the Plans, Specifications, and Contracts Made Use of by Thomas Telford, Esq. on the Holyhead RoadLongman, Orme, Brown, Green, and Longmans, 1838 - 465 sider |
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Side x
... Theodolites Spirit Levels Sextants - Spades - Shovels Trucks - Hammers 253 255 257 257 258 Scrapers - 259 Hedging Knives - Working Levels 261 Ring Gauges 262 CHAP . XII . ROAD LEGISLATION , P. 263 . Turnpike System Origin of Turnpike ...
... Theodolites Spirit Levels Sextants - Spades - Shovels Trucks - Hammers 253 255 257 257 258 Scrapers - 259 Hedging Knives - Working Levels 261 Ring Gauges 262 CHAP . XII . ROAD LEGISLATION , P. 263 . Turnpike System Origin of Turnpike ...
Side 253
... theodolites , spirit levels , and sextants . Theodolites . Theodolites in careful and experienced hands are the best instruments for laying ... theodolite is used in the following manner in surveying ROAD INSTRUMENTS AND TOOLS, P Theodolites.
... theodolites , spirit levels , and sextants . Theodolites . Theodolites in careful and experienced hands are the best instruments for laying ... theodolite is used in the following manner in surveying ROAD INSTRUMENTS AND TOOLS, P Theodolites.
Side 254
... theodolite is used in the following manner in surveying a road : - When the line of direction is fixed upon , the theodolite is set up over the first point in the sur- vey ; it is then adjusted by means of the spirit levels , so as to ...
... theodolite is used in the following manner in surveying a road : - When the line of direction is fixed upon , the theodolite is set up over the first point in the sur- vey ; it is then adjusted by means of the spirit levels , so as to ...
Side 255
... theodolite . The vane having been previously adjusted to the exact height of the centre of the telescope , the head of the instrument is then turned round until the staff is seen in the field of view of the telescope : the head is then ...
... theodolite . The vane having been previously adjusted to the exact height of the centre of the telescope , the head of the instrument is then turned round until the staff is seen in the field of view of the telescope : the head is then ...
Indhold
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Almindelige termer og sætninger
Allesley arch Archway Road axles bottom breadth brick bridge broken stones built carriage centre coach coating commissioners constructed contract contractor Coventry cross drains DAVIES GILBERT depôts depth draught dynamometer earth eighteen inches elasticity embankments engineer expense experiments feet wide fences foot footpath fore wheels formed foundation four inches friction gravel ground half hard Hartshill height hill hind wheels Holyhead Road horizontal horses improvement inches deep inches thick inches wide instrument John Kershaw John Macneill labour laid length line of road manner masonry ment miles mortar mound necessary nine inches paved pavement placed Plate VII proper quicksets rails rates of inclination repair road-making roadway ruts side channels side springs six inches slopes specification spirit level springs square streets surface surveyor Telford theodolite Thomas Baylis three feet three inches trustees turnpike roads turnpike trusts upper velocity waggon whole wing walls
Populære passager
Side 20 - They will here meet with rutts which I actually measured four feet deep, and floating with mud only from a wet summer; what therefore must it be after a winter?