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 45
oportion- For as A 2? is vntoc/tf C, fo B B, equall to AC, is vnto CQ. 7 Three Urns being giuen to finde the fourthin difcontinuall proportion. HEre the flirt line& the third are to be placed on bothfides oftheiV#0r from the center,then take out thefeccond line, and to ic open the Settor in the… … 4BC Fir ft T take out A and C,and place them on both fides ofthe SbQor,in A B, A C,and A D,AE,laying the beginningof both lines at the center A,thcn do I takeout B the fe-cond line, according to it I open the Stftor m B and C,the cermet The vfe eft he lines t>fLhef> \ J…
Astronomy · Puritans
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