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Geodaesia improved; or, a new and correct method of surveying made exceeding easy in two parts : part I. Teacheth to measure, divide, and delineate, any quantity of land both accessible and inaccessible, whether meadows, pasture, fields, woods, water, commons, forests, manors, &c. by the chain only, whose dimensions are cast up by the pen, and consequently freed from the errors of estimation that unavoidably attend the scale and protractor. With necessary directions to map elegantly : part II. Introduces instruments, trigonometry, preparative remarks on the earth's superficies; and teacheth the invaluable method of casting up the dimensions of instruments by the pen several ways, all agreeing, &c. &c. : with a most useful appendix concerning the practical methods of measuring timber, hay'marl pits, bricklayers and plasterers work... / A. Burn
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GEODÆSIA Improved.

CHAP. II.

Containing the Description and Use of several Injiru-ments that are mads Use of in the Art of Surveying.

SECTION I.

T H E practical Part of Surveying for Ages past, hath beyngenerally peyformed by such Instruments as are particularlyadapted to the Art, which may be comprehended under the twofollowing Heads, viz. Lines and Angi.es.

First os Lints , or measuring of Distances.

There are several Sorts of Chains, (2c. mentioned for thatPurpose in Pages 8r and 8z.

Secondly of Angles.

There are various Instruments whereby the Quantity of An-gles are taken, namely, the Theodolite, Circumferentor, Semi-circle, (Ac. (Ac*

And thirdly.

There are also many Instruments used in planning a Surveyfrom the Field Notes, calculating and working Proportions, (Ai.as the Protractor Scale, sliding Rule, Dividers, (Ac.

SECT. II.

And first of the THEODOL ITE.

There are such Varieties of Theodolites constructed now-a-d v - that it would be an endless Task to give a particular Dc-:c! ' T thereA>re think it sufficient to give such a

‘ ■ ' general

 
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