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 105
AC AV 75 IOO EG 28 CE 21 Co CB AO 35 35■ptf. AE 72 AB 44, I BCE 53 748 [BT> 28 sm 5$ 748 ^D 28 BCD ioi5iy 36 ££ 56 ACD ii6%i 12 £1> TOO Z# 4 Rett angle right line Triangle,1 To finds the bafc^ both fides banggivm. … Let the S<?#<>r be opened in the line oMines to a right an-gle, (at before was fhe wed Op. 2. /Va/>. 7.) then take outthe fides of the triangle, and lay them, one on one U**% theother on the other //»<?, fo as they rheete in the center, &marke how farre they extend.. For the line…
Astronomy · Puritans
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