The panorganon for solving the common problems of the terrestrial globe : Northern Hemisphere.
Circular polar projection map of Northern Hemisphere; attaches to and rotates behind circular cut-out window, with scale measuring longitude.; "Pr. 5s. for both Hemispheres Plain, or 6s. Colourd. Where may be had, The Improved Analemma by the same Author, for solving the Common Problems of Cœlestial Globe. Sold also by Mesrs. Mount & Page on Tower Hill. And J. Johnson in St. Paul's Church Yard London.".
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