91063 Gibson, Robert. ་ A treatise of practical surveying; which is demonstrated from its first principles. Wherein every thing that is useful and curious in that art, is fully considered The whole illustrated with copperWith alterations plates. 5th ed. By Robert Gibson and explained The ... and amendments, adapted to the use of American survey. -ers. Dublin Printed by P.Wogan street between Mg p. P. The tables have special t. p 21 in nd and Third streets. 118- ure Library of Congress works to 1800. TA545.G4 1789 24-30113 179 G45 |