Grammelogia, or, The mathematicall ring extracted from the logarythmes, and projected circular : now published in th[e] inlargement thereof unto any magnitude fit for use, shewing any reasonable capacity that hath not arithmeticke, how to resolve and worke, all ordinary operations of arithmeticke : and those that are most difficult with greatest facilitie, the extract on of rootes, the valuation of leases, &c. the measuring of plaines and solids, with the resolution of plaine and sphericall triangles applied to the practicall parts of geometrie, horo[l]ogographic, geographie, fortification, navigation, astronomie, &c, and that onely by an ocular inspection, and a circular motion / invented an[d] first published, by R. Delamain, teacher, and student of the mathematicks.

GRAMMELOGIA Or, the Mathematicall Ring.

Extracted from the Logarythmes, and projected Circular: Now published in t•• inlargement thereof unto any magnitude fit for use: shewing any reason∣able capacity that hath not Arithmeticke, how to resolve and worke, all ordinary operations of Arithmeticke:

And those that are most difficult with greatest facilitie, the extract••¦on of Rootes, the valuation of Leases, &c. the measuring of Plaines and Solids, with the resolution of Plaine and Sph••ricall Triangles applied to the Practicall parts of Geometrie, Horo••ogographie, Geographie, Fortification, Navigation, A••••ronomie, &c.

And that onely by an ocular inspection, an•• a Circular motion, Invented an•• first published, by R. Delamain, Teacher, an•• Student of the Mathematicks. Naturae secreta tempus ••aperit.

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Typus proiectionis Annuli adaucti, vt in Conclusione. lybri praelo commissi, Anno 1630 promisi.