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Page 194, at the bottom. Area 28A. 1R. 12P.+ The figure on page 116, is up side down.

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THE

PRINCIPLES

OF

SURVEYING.

SURVEYING.

SURVEYING is the art of delineating and calculating the content of land, in acres, roods and perches, and consists in a knowledge of geometrical definitions and problems.

GEOMETRY.

GEOMETRY is the science wherein we consider the

perties of magnitude.

B

pro

(2)

GEOMETRICAL DEFINITIONS,

USEFUL IN SURVEYING.

1. A Point is the smallest space that can be assigned, as at A.

2. A Line is the nearest distance between two points, and is considered without breadth or thickness, as A-B.

3. Lines equally distant from each other, Ain all their parts, are called parallel lines, as AB and CD.

4. The inclination, or opening, between two lines, which intersect in a point, is called an Angle, as the opening between the lines AB and AC; the angle is generally represented by three letters, thus BAC, the middle letter being at the angular point, or place of intersection, which is always considered to be the centre of a circle.

B

A

5. When one line stands on another, so as to incline

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