The description and uses of the general horological-ring: or universal ring-dyal Being the invention of the late reverend Mr. W. Oughtred, as it is usually made of a portable pocket size. With a large and correct table of the latitudes of the principal places in every shire throughout England and Wales, &c. And several ways to find a meridian-line for the setting a horizontal dyal. By Henry Wynne, maker of mathematical instruments near the Sugar-loaf in Chancery-lane - Wynn, Henry (printed by A. Godbid and J. Playford, for the author, 1682)
Reproduction of the original in the British Library. - Wing (2nd ed., 1994), W3778B. - With a final leaf of advertisements