The Sector on a quadrant : or a treatise containing the description and use of four several quadrants ... / written by John Collins. - Collins, John, 1625-1683 (printed by J.M. for George Hurlock at Magnus Corner, thomas Pierrepont, at the Sun in Pauls Church-Yard; William Fisher, at the Postern near Towe-Hill, Book-sellers; and Henry Sutton, Mathematical Instrument-Maker, at his House in Thred-needle street, behind the Exchange. With Paper Prints of each Quadrant, either loose or pasted upon boards; to be sold at the respective places aforesaid, 1659)