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.

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Title
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.
Author
Delamain, Richard, fl. 1631.
Publication
[S.l. :: s.n.],
1630.
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Subject terms
Logarithms -- Early works to 1800.
Mathematical instruments -- Early works to 1800.
Arithmetic -- Early works to 1800.
Link to this Item
http://name.umdl.umich.edu/A20103.0001.001
Cite this Item
"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." In the digital collection Early English Books Online 2. https://name.umdl.umich.edu/A20103.0001.001. University of Michigan Library Digital Collections. Accessed June 2, 2025.

Pages

Page [unnumbered]

Ʋpon his Ring.

AS in a secret Circle wrapt lies natures mysteries, Which time brings forth, and industry makes plaine to all mens eyes, So that what erst was hard to finde, at length is wrought with ease, Rules of Proportion, the Roots Extraction, and thee With ocular inspection now: Also Triangles Plaine And Sphaericall; for Questions soone an Answer to obtaine; That it makes Art laugh his quicknesse to see, then use this Ring, The Circle where, hid Arts lie now themselves discovering. If after times shall seeke more ease than in this easinesse By Instrument, he makes Art lame, with eases great excesse.
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