A canon of triangles: or A table of artificiall sines, tangents, and secants, : drawne from the logarithmes of the lord of Merchistone. : Whereby all sphericall triangles are most easily resolued by addition and subraction onely.. - Gunter, Edmund (Printed by W. Stansby, and are to be sold by Iohn Tappe, at Saint Magnus Corner., 1620)