Land and marine surveying1868 - 184 pages |
From inside the book
Results 1-5 of 33
Page 5
... suppose a line started at the foot of a hill , and sighted on a chimney in the distance ; on reaching higher ground , two or three more may come in sight in close proximity to that selected , and although that selected will be higher ...
... suppose a line started at the foot of a hill , and sighted on a chimney in the distance ; on reaching higher ground , two or three more may come in sight in close proximity to that selected , and although that selected will be higher ...
Page 6
... suppose that a line has already been chained forwards some eight or ten chains , and that we come to a copse through which the line has to be continued . Set up a pole at the beginning and ending of the part of the line already chained ...
... suppose that a line has already been chained forwards some eight or ten chains , and that we come to a copse through which the line has to be continued . Set up a pole at the beginning and ending of the part of the line already chained ...
Page 7
... suppose , for instance , that after running a line for some length on an object in the distance , we see that we shall shortly lose sight of it for some time at least , because we are going down - hill into a valley . Let the sur- veyor ...
... suppose , for instance , that after running a line for some length on an object in the distance , we see that we shall shortly lose sight of it for some time at least , because we are going down - hill into a valley . Let the sur- veyor ...
Page 8
... suppose that you are wasting time by making your chainman understand as thoroughly as possible what you require him to do ; an intelligent chainman is a valuable assistant ; we have found sailors and soldiers make capital chainmen , and ...
... suppose that you are wasting time by making your chainman understand as thoroughly as possible what you require him to do ; an intelligent chainman is a valuable assistant ; we have found sailors and soldiers make capital chainmen , and ...
Page 9
... suppose we are pricking out a straight line , say a mile long , for a working survey , over nearly level ground , and that the ranging rods are to be set up at about every five chains . Evidently , after two or three poles have been set ...
... suppose we are pricking out a straight line , say a mile long , for a working survey , over nearly level ground , and that the ranging rods are to be set up at about every five chains . Evidently , after two or three poles have been set ...
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Common terms and phrases
adjustment arrow ascertain base line beam compasses box sextant broad arrow centre chain line chainage chainman Chap clamp cloth co-efficients coincide compass correct cosine coversine depth difference distance divisions draw edge engineering equal error exactly feet long fence field book fixed gamboge gauge give Gunter's chain half high water horizon glass inches instance instrument intersection leader length loosen lunitidal intervals manner mark means measure ment minutes notch object observations obtained offset staff Outfall Sewer overfall Oyster Rock paper parallel parallel ruler pencil plot pole practice prick protractor quantity Railway rain gauge rainfall reading referred right angles road scale side sight sine square station straight line straight-edge streams suppose survey surveyor Tables taken telescope theodolite tie line timber tion tracing traverse triangle TRIGONOMETRY turn vernier plate vertical W. D. Hamilton woodcuts zero
Popular passages
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