Geodaesia: Or, The Art of Surveying and Measuring Land Made Easy. Shewing by Plain and Practical Rules, to Survey, Protract, Cast Up, Reduce Or Divide Any Piece of Land Whatsoever; with New Tables for the Ease of the Surveyor in Reducing the Measure of Land. Moreover a More Facile and Sure Way of Surveying by the Chain, Than Has Hitherto Been Taught. As Also to Lay Out New Lands in America, Or Elsewhere: and how to Make a Perfect Map of a River's Mouth Or Harbour; with Several Other Things Never Before Published in Our Language
G.G.J. and J. Robinson, 1792 - 206 pages
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12 chains 50 links according acres added againſt alſo angle Anſwer arch baſe bears called circle Co-fine Co-tang compaſſes contained degrees deſcribe diameter direct diſtance divide diviſion draw the line equal example fall fame feet fide field field-book figure firſt five fixed give given half hedge height houſe inch inſtrument land laſt length leſs logarithm look mark meaſure minutes multiplied muſt needle Note obſerve parallel perches perpendicular plot proportion protractor quantity quotient reduce remains right-angled river roods root round ſame ſay ſcale ſecond ſee ſet ſetting one foot SEWN ſhall ſide Sine ſquare ſtand ſtation ſtick ſuch ſum ſuppoſe ſurvey taken Tangent taught thereof theſe thing tower triangle true turn uſe whole yards
Page 62 - If you fdrvey by Mr. Norwood's Way, then there muft be four Columns more for EWN and Southing. You may alfo make two Columns more, if you pleafe, for Off-fets, to the right and left. Laftly, You may chufe whether you will have any Lines or not, if you can write ftrait, and in good Order, the Figures directly one under another. For this I leave you chiefly to your own Fancy ; for I believe there are not two Surveyors in England, that have exactly the fame Method for their Field Notes. Of the Scale....
Page 129 - ... the other is eafily found ; for as 7 is to 22, fo is the diameter to the circumference ; and as 22 is to 7, fo is the circumference to the diameter* In this annexed figure, the diameter AB is 2 chains or 200 links; which multiplied by 22 and the product divided by 7* gives 6 chains, 28 links, and fomething more for the circumference.