The description and use of a portable instru-
eLeybourn, Williams 1626-1700? #XE The description and use of a portable instru- .685 ment, vulgarly known by the name of Gunters -L59D quadrant ... Collected and digested into this portable volum, for the use of young practi- tioners. By a true lover of the mathematicks. London, Printed by T. B. for H, Sawbridge, at the Bible on Ludgate-Hill. 1685.
1 Poles 70 pe front. (fold. diagr. ) 13cm. (12mo ) (Continued on next card) MB