The description and use of the sector, crosse-staffe, and other instruments : with a canon of artificiall Sines and Tangents, and the use thereof in astronomie, navigation, dialling and fortification .. (1636)
Gunter, Edmund, 1581-1626 · London : Printed by William Iones for Iames Bowler · leaf 29
^»«, defcribe a circle and diuide it into 4equall parts Q E ^ ^drawing the croflfe diameters C BjSD. Then diuide the femidiameter A C,firft uro 10 equallparts, and between the whole line ^4 O & AF the tenthpart of A Ct (eeke out two mcahe proporf ionall lit ^ AIand>4H: againe betweene A D… … is Secondly, diuideeach tenth part of the line A £ intoso more, and betweene the whole line iADy and each ofthorn, fceke out two raeane proportionalls as before.- Sofliall the line A 2?bediuidednQw into an hundred vne-<guall parrs. Thirdly, If the length will bcare it^ fubdiuide the line1A C…
Astronomy · Puritans
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