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On surveying with the chain A triangle the only geumetrical figure
4 other sections not shown
accuracy acres angular instruments angular point arrived base line bisect boundary buoy centre chain angle chain's length chainage circumferenter commence compass computed convenient correctly determined diagonal diagram direction distance ditch divided division draw drawn Edmund Gunter enclosure equal error extremity false stations feet fence field field-book figure fixed formed ground Gunter's chain half hedge horizontal inch intersection laid laying leader line A B line measured lines of construction main lines manner mark means measure a line ment meridian method necessary object observed obtained operation paper parallel parallel ruler parish perpendicular plate plotting plumb line previously projecting arms proof line protractor purpose right angles right line road roods scale screws sextant side slider spirit level square straight survey surveyor take the angle taken taking offsets termination theodolite three chains tion Tithe Commissioners trapezium triangle tye line vernier vertical yards