down, it will fit through the ring again. Works Essai de perspective, 1711 Philosophiae Newtonianae Institutiones, in usus academicos, 1723 An essay on perspective, 1724 Mathematical elements of physicks, prov'd by experiments : being an introduction to Sir Isaac Newton's philosophy, 1720 Introductio ad Philosophiam, Metaphysicam et Logicam, 1736 Mathematical Elements of Natural Philosophy, Confirm'd by Experiments: or, An introduction to Sir Isaac Newton's philosophy (Volume I), 1747 (first printed in 1720) Mathematical Elements of Natural Philosophy, Confirm'd by Experiments: or, An introduction to Sir Isaac Newton's philosophy (Volume II), 1747 (first printed in 1721) Oeuvres Philosophiques et Mathématiques de Mr. G. J. 'sGravesande, ed. with memoir by J. Allamand, 1774 See also 9682 Gravesande, main-belt asteroid named after Willem Jacob Gravesande References Further reading A. R. Hall, s Gravesande, Willem Jacob", in Dictionary of Scientific Biography, vol. V, (New York: 1972), pp. 509–11. C. de Pater, "Experimental Physics", in Leiden University in the Seventeenth Century, An Exchange of Learning (Leiden: 1975), pp. 308–327. External links Natural philosophy 's Gravesande's mistaken belief in perpetuum mobile 's Gravesande's New York Public Library entry The Oldest Magic Lantern in the World Presentations of Willem 's Gravesande's Lectures, Devices, Laboratory and Experiments List of Ph.D. students of Willem 's Gravesande 1688 births 1742 deaths 18th-century Dutch physicists 18th-century Dutch mathematicians People from 's-Hertogenbosch Leiden University alumni Academic staff of Leiden University sGravesande