Buch 
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
Entstehung
Seite
69
JPEG-Download
 

GEODÆSIA Improved. 69

Thus the square Root of any mixt Number may be found, thefractional Part first reduced into even Places of Decimals, or sup-plied by Cyphers, if need be; so if the square Root of 40 (the Polesin a Rood of LandJ were required to 3 Places of Decimals, theWork would stand as here, and the square Root would be 6.324.

)4Q.(6.Z24

36

123)400

369

1262)3100

2524

12644)57600

50576

remains 7024

Thus have I finished my first Chapter, wherein the Learnerwill find Arithmetic sufficient to qualify him for surveying. Andif any one be desirous of further Explanations in the foregoingRules, let him consult some Treatise adapted thereto, as Cocker,Hill , Fijher , &c. and he will be more particularly informedtherein; for my Intention is to be as brief as poffible, until Icome to the Thing proposed, namely, Surveying made com-pletely easy.

CHAP,