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

FOUR HUNDRED ENGRAVINGS,

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:

D. APPLETON & CO. 346 & 348 BROADWAY,

AND 16 LITTLE BRITAIN, LONDON.

M DCCC LVI.