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 525
SVppofe a long cortin to be fortified with Bulwarkes »theangle of each Bulwarke to bee 90 gr4 the angle at thegorge forming the flanque 3 $gr, the reft, as in the former ta^ble, the line of defenfe, 720 fbote, and the face of the Bul-warke 300 foote. 1 In the triangle A E F, hauing the three angles…
Astronomy · Puritans
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