Surveying, as Practiced by Civil Engineers and Surveyors ...: Intended as a Handbook for Field and Office Use, Also as a Textbook for Students |
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Page xi
... Equal Altitudes of Circumpolar Star - Meridian by Equal Altitudes of the Sun- - - Latitude and Longitude by Account -- Rule- Meridian CONTENTS . xi.
... Equal Altitudes of Circumpolar Star - Meridian by Equal Altitudes of the Sun- - - Latitude and Longitude by Account -- Rule- Meridian CONTENTS . xi.
Page 1
... equal to 1 acre . Both chains consist of 100 links , о 100 90 0 10 70 60 * 30 0899 50 40 50 880 40 60 182 30 70 Fig . 1. - Chain . KR 3820 3280 884 90 100 080 and every tenth link is distinguished by a brass tablet , as shown in Fig . 1 ...
... equal to 1 acre . Both chains consist of 100 links , о 100 90 0 10 70 60 * 30 0899 50 40 50 880 40 60 182 30 70 Fig . 1. - Chain . KR 3820 3280 884 90 100 080 and every tenth link is distinguished by a brass tablet , as shown in Fig . 1 ...
Page 2
... equal to 65.6 ft . Reading the Chain . In taking measurements with the chain , we must look for the nearest brass tablet short of the point that is being measured to , and count the number of links from it forward to the point in ...
... equal to 65.6 ft . Reading the Chain . In taking measurements with the chain , we must look for the nearest brass tablet short of the point that is being measured to , and count the number of links from it forward to the point in ...
Page 12
... equal to ac . This method is not recommended for producing the chain line when the building cannot be seen over , as bD is too small a base to work off . Setting out a Right Angle with the Chain . — The follow- ing simple method of ...
... equal to ac . This method is not recommended for producing the chain line when the building cannot be seen over , as bD is too small a base to work off . Setting out a Right Angle with the Chain . — The follow- ing simple method of ...
Page 13
... equal to twice bd , then ae- bd bd , and we get bc = ab , or bc = - bdx ab bd × ab ae bd = = ab . bd Another method is as follows : -1 -In Fig . 15 , at the point a in the chain line AB erect the perpendicular ab and bisect it in c ...
... equal to twice bd , then ae- bd bd , and we get bc = ab , or bc = - bdx ab bd × ab ae bd = = ab . bd Another method is as follows : -1 -In Fig . 15 , at the point a in the chain line AB erect the perpendicular ab and bisect it in c ...
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Surveying, As Practiced by Civil Engineers and Surveyors ...: Intended As a ... John Whitelaw, Jr. No preview available - 2015 |
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accuracy accurate adjustment altitude aneroid axis azimuth back sight barometer bench marks bubble tube calculated centre line chain line Chapter clinometer cloth collimation line compass contours correct cross hairs cross sections Crown 8vo curve D. K. CLARK deflection angle difference distance elevation Engineer equal Feet fence field book fixed fore sight formulæ given gradient graduated Greenwich mean ground Handbook height horizontal Illustrations instrument latitude length longitude magnetic bearings mean measured meridian method metres miles millimetres minutes Nautical Almanac object glass observed angle parallel perpendicular plane Plates plotted plumb line position Practical railway ranging rod right ascension scale screws sextant shown in Fig side slope spherical spirit level stadia hairs staff reading star station surface survey surveyor tacheometer Tacheometry taken tangent point tape telescope temperature theodolite traverse Treatise triangle Troughton & Simms tunnel vernier vertical angle wire
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