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 224
fideji^D to bee 14 gr. 40 m. and the angle ADB oppofiteto the fide required, to bee 112 gr: wherefore I extendthe coittpafles in the line of Sines from 14 gr. 40 w. unto12a gr. or ( which is all one ) to 58 gr. ( for after 90 gr.the line of tiogr, is alfo the fine of 100 gr. and the fineof 70 gr.… … In like maner if I extend my compaffes from the fine of14*^,40 m. to the fine 43^. 20. nt. the fame extent willreach in the line of T^wnbers from 100 to 271. And fuch isthe diftance betweenc D and B. Or in crofle worke, I may extend the compares from 14gr.^om. in the «&»*/, unto 100 parts in…
Astronomy · Puritans
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