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John Playfair FRSE, FRS (10 March 1748 – 20 July 1819) was a Church of Scotland minister, remembered as a scientist and mathematician, and a professor of natural philosophy at the University of Edinburgh. He is best known for his book Illustrations of the Huttonian Theory of the Earth (1802), which summarised the work of James Hutton. It was through this book that Hutton's principle of uniformitarianism, later taken up by Charles Lyell, first reached a wide audience. Playfair's textbook Elements of Geometry made a brief expression of Euclid's parallel postulate known now as Playfair's axiom. (From Wikipedia) More about John Playfair:
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| | Books by John Playfair: ![[Info]](https://onlinebooks.library.upenn.edu/info.gif) Playfair, John, 1748-1819, contrib.: Supplement to the Fourth, Fifth, and Sixth Editions of the Encyclopaedia Britannica; With Preliminary Dissertations on the History of the Sciences (6 volumes; Edinburgh: Printed for A. Constable and Co.; London: Hurst, Robinson and Co., 1824), ed. by Macvey Napier, also contrib. by William Thomas Brande and Dugald Stewart- Playfair, John, 1748-1819: The Works of John Playfair, Esq. (4 volumes; Edinburgh: Printed for A. Constable and Co.; London: Hurst, Robinson, and Co., 1822), ed. by James G. Playfair (page images at HathiTrust)
Additional books by John Playfair in the extended shelves:![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif) Playfair, John, 1748-1819: Catalogue of the library of the late John Playfair ... (James Ballantyne, 1820), also by James Ballantyne (page images at HathiTrust)- Playfair, John, 1748-1819: A comparative view of the Huttonian and Neptunian systems of geology: (Printed for Ross and Blackwood, 1802), also by John Murray (page images at HathiTrust)
- Playfair, John, 1748-1819: Dissertation second: exhibiting a general view of the progress of mathematical and physical science, since the revival of letters in Europe ([A. Constable & co.; etc., etc.], 1824) (page images at HathiTrust)
- Playfair, John, 1748-1819: Dissertation second: exhibiting a general view of the progress of mathematical and physical science, since the revival of letters in Europe. ([B., 1820) (page images at HathiTrust)
- Playfair, John, 1748-1819: The Element of geometry. (W.E. Dean, 1836) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry (Bell & Bradfute, 1836), also by John Davidsons and William Wallace (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: (W.E. Dean, 1863) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry. Being chiefly a selection from Playfair's geometry (A. Walker, 1829), also by Francis Nichols (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids: to which are added elements of plane and spherical trigonometry (Published by Collins & Hannay [etc.], 1860) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry, containing the first six books of Euclid, with a supplement on the quadrature of the circle and the geometry of solids (Printed for F. Nichols by T. and G. Palmer, 1806) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle and the geometry of solids; to which are added elements of plane and spherical trigonometry (Printed and published by George Long, no. 71, Pearl-street, 1819) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle and the geometry of solids; to which are added, elements of plane and spherical trigonometry (Marot & Walter, 1826) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids: to which are added, elements of plane and spherical trigonometry (W. E. Dean, 1847) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid : with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, Elements of plane and spherical trigonometry (W.E. Dean, 1849) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids: to which are added, elements of plane and spherical trigonometry (W. E. Dean [etc.], 1842) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids: to which are added, elements of plane and spherical trigonometry (Collins & Hannay [etc.], 1833) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids: to which are added, elements of plane and spherical trigonometry (W. E. Dean [etc.], 1835), also by James Ryan (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle and the geometry of solids ; to which are added elements of plane and spherical trigonometry. (Published by E. Duyckinck, and George Long, 1824) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle and the geometry of solids; to which are added elements of plane and spherical trigonometry (W. E. Dean [etc.], 1840) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids; to which are added, Elements of plane and spherical geometry. (W. E. Dean, 1845) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid : with a supplement on the quadrature of the circle, and the geometry of solids : to which are added elements of plane and spherical trigonometry (A. Walker, 1832), also by Euclid (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, elements of plane and spherical trigonometry (J.P. Lippincott & Co., 1855), also by Euclid (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, elements of plane and spherical trigonometry (J.P. Lippincott & Co., 1856), also by Euclid (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle and the geometry of solids ... (J. Eastburn & Co., 1819) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle and the geometry of solids : to which are added Elements of plane and spherical trigonometry (W.E. Dean, 1853), also by Euclid (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry, containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids; to which are added, Elements of plane and spherical trignonometry. (Bell & Bradfute; [etc., etc.], 1875), also by Philip Kelland and William Wallace (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids: to which are added Elements of plane and sherical trigonometry. (A. Walker, 1839) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, elements of plane and spherical trigonometry (W. E. Dean ..., 1843) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids: to which are added elements of plane and spherical trigonometry (J.B. Lippincott, 1857), also by Euclid (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry; : containing the first six books of Euclid, with a supplement on the quadrature of the circle and the geometry of solids; to which are added, Elements of plane and spherical trigonometry. (Printed for Bell & Bradfute; and G. & J. Robinson, London., 1804) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids: to which are added, elements of plane and spherical trigonometry (W. E. Dean, 1835), also by James Byan (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid : with a supplement on the quadrature of the circle, and the geometry of solids : to which are added elements of plane and spherical geometry (J.B. Lippincott & Co., 1860), also by Euclid (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry, containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids. To which are added, elements of plane and sperical trigonometry. (W.E. Dean, 1844) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids: to which are added, edlemnts of plane and spherical trigonometry. (W. E. Dean, 1836), also by James Ryan (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids: to which are added, Elements of plane and spherical trigonometry. (W. E. Dean, 1851), also by Euclid (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids: to which are added, elements of plane and spherical trigonometry. (Lippincott, Grambo & Co., 1854) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, elements of plane and spherical trigonometry (W. E. Dean, 1848) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry; containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids. To which are added, elements of plane and spherical trigonometry. (W.E. Dean, 1852) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry; containing the first six books of Euclid, with a supplement on the quadrture of the circle and the geometry of solids; to which are added, Elements of plane and spherical trigonometry (Printed for Bell & Bradfute [etc.], 1822), also by William Wallace (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry: containing the first six books of Euclid, with a supplement ... to which are added, elements of plane and sphericale trigonometry ... From the last London ed., enℓ. (J.B. Lippincott & Co., 1866), also by Euclid (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of geometry; containing the first six books of Euclid, with two books on the geometry of solids. To which are added, Elements of plane and spherical trigonometry (Printed for Bell & Bradfute;, 1795) (page images at HathiTrust)
- Playfair, John, 1748-1819: Elements of plane geometry according to Euclid (W. and R. Chambers, 1837), also by Andrew Bell and Robert Simson (page images at HathiTrust)
- Playfair, John, 1748-1819: Explication de Playfair sur la théorie de la terre par Hutton, et examen comparatif des systèmes géologiques. (Bossange et Masson, 1815), also by César Auguste Basset (page images at HathiTrust)
- Playfair, John, 1748-1819: Illustrations of the Huttonian Theory of the Earth (Gutenberg ebook)
- Playfair, John, 1748-1819: Outlines of natural philosophy, being heads of lectures delivered in the University of Edinburgh (Printed for A. Constable and Company; [etc., etc.], 1819) (page images at HathiTrust)
- Playfair, John, 1748-1819: Outlines of natural philosophy : being heads of lectures delivered in the University of Edinburgh (Printed by A. Neill & Co. for Archibald Constable and company..., 1812) (page images at HathiTrust)
- Playfair, John, 1748-1819: Playfair's Euclid (W.E. Dean, 1846) (page images at HathiTrust)
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