TREATISE ON LAND-SURVEYING: COMPRISING THE THEORY DEVELOPED FROM FIVE ELEMENTARY PRINCIPLES; AND THE PRACTICE WITH THE CHAIN ALONE, THE COMPASS, THE TRANSIT, THE THEODOLITE, THE PLANE TABLE, &c. ILLUSTRATED BY AND A MAGNETIC CHART. By W. M. GILLESPIE, A. M., Civ. ENG., PROFESSOR OF CIVIL ENGINEERING IN UNION COLLEGE. AUTHOR OF A MANUAL OF ROAD-MAKING," ETC. THIRD EDITION. NEW-YORK: AND 16 LITTLE BRITAIN, LONDON. MDCCC LVI. |