COLLINS, John. The sector on a quadrant: or A treatise containing the description and use of four several quadrants … [including “The description and uses of a great universal quadrant” & “The description and uses of a general quadrant”]; also an Appendix touching reflected dyalling from a glass placed at any reclination [by John Lyon]. London: J. M. for George Hurlock et al., 1659.
First edition, second issue, with cancel title dated 1659. A quadrant is an astronomical calculating device showing a projection of the heavens. By the end of the seventeenth century it was one of the most common astronomical instruments. This volume is actually a combination of four separate works, the last two separately paginated. The first three are by Collins and describe various configurations of quadrants. The final work, an appendix by John Lyon, describes how sundials
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