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THE DISCOURSE Made before the Royal Society The 26. of November 1674.
Concerning the Use of Duplicate Proportion In sundry Important Particulars: Together with a New Hypothesis of Springing or Elastique Motions.
BY Sir WILLIAM PETTY, Kt. Fellow of the said Society.
Pondere, Mensurâ, & Numero Deus omnia fecit: Mensuram & Pondus Numeres, Numero omnia fecit.
LONDON: Printed for Iohn Martyn, Printer to the Royal Society, at the Bell in St. Pauls Churchyard, 1674.