ON

SURVEYING

CONTAINING

THE THEORY AND PRACTICE:

TO WHICH IS PREFIXED

A PERSPICUOUS SYSTEM

OF

PLANE TRIGONOMETRY.

THE WHOLE

CLEARLY DEMONSTRATED AND ILLUSTRATED

BY

A LARGE NUMBER OF APPROPRIATE EXAMPLES.

PARTICULARLY ADAPTED TO THE USE OF SCHOOLS.

BY JOHN GUMMERE.

SECOND EDITION, IMPROVED.

PHILADELPHIA:
PUBLISHED BY JOHN RICHARDSON, NO.-31, MARKET-STREET.

Griggs & Co. Printers.