HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 671 



13413 PLAYFAIR (John, F.R.S.) WORKS, with Memoir [by the EDITOR and LORD JEFFREY ; edited 

 by JAMES G. PLAYFAIR], 4 thick vols. 8vo. hf. calf (joints broken) ; SCARCE, 1. 5s Edin., 1822 



Containing all the author's works and papers, save ' Elements of Geometry' and ' Outlines of Natural Philosophy ', 

 and including 1m celebrated 'Illustrations of the Huttoiiian Theory of the Earth', 'a model of purity of diction, 

 simplicity of style, and clearness of explanation, which not only gave p ipularity to Hutton's theory, but helped to create 

 the modern science of geology ' (D. N. B.), and the valuable ' Progress of the Mathematical and Physical Sciences.' 



13414 ELEMENTS of GEOMETRY, containing the First Six Books of Euclid, with Supplement on 



the QUADRATURE of the CIRCLE, and the GEOMETRY of SOLIDS, also Elements of Plane and 

 Spherical Trigonometry, 2nd Edition, enlarged, with numerous diagrams, 8vo. old sheep 

 (damaged), 3s ibidem, 1804 



13415 - THIRD EDITION, enlarged, with numerous diagrams, Svo. old sheep (damaged), 3s ib., 1810 



13416 EIGHTH EDITION, with Additions by WILLIAM WALLACE, F.R.S.E., with numerous 



diagrams, 8vo. calf, 4s ib., 1831 



13417 NINTH EDITION, with Additions, by JOHN DAVIDSON, with numerous diagrams, 8vo. 



hf. calf (back damaged), 3s ib., 1836 



13418 On the ORIGIN and INVESTIGATION of PORISMS, with 2 folding copperplates, 4to. (pp. 



53), sewn, 5s Qd [ib., 1792] 



' A learned paper, containing a number of curious observations on the geometry of the ancients in geneial, as well as 

 forming a complete treatise as it were on poi isms in particular.' Dr. C. Mutton, F.R.S. , who quotis extensively liom 

 the above paper in his Philosophical and Mathematical Dictionary. 



13419 OUTLINES of NATURAL PHILOSOPHY : Lectures in the University of Edinburgh, first 



edition, with 6 plates, 2 vols. 8vo. brown calf gilt, 5s ib., 1812-14 



13420 PLAYFAIR (Lyon first Lord, F.R.S.) A' CENTURY of CHEMISTRY in the UNIVERSITY of 

 EDINBURGH, 8vo. (pp. 30), sewn, with inscr. to Prof. Tyndall (as below), 3s Edin., 1858 



'Dr. Tyndal [sic] from the Author.' Inscr. on cover. It was the author's introductory lecture on his appointment 

 to the chair of chemistry in Edinburgh University. 



13421 On the FOOD of MAN under different Conditions of Age and Employment, with folding 



table, 8vo. (pp. 4), sewn, Is Qd 1853 



13422 On the GASES EVOLVED during the FORMATION of COAL, roy. 8vo. (pp. 1-16), sewn* 



\s Qd n. d. 



This memoir was unknown to Poggendorff. 



13423 INDUSTRIAL INSTRUCTION on the CONTINENT, roy. 8vo. (pp. 54), sewn, with auto, of 



Prof. Hilary Bauerman, Is Qd 1852 



13424 On the NATIONAL IMPORTANCE of STUDYING ABSTRACT SCIENCE with a View to the 



healthy PROGRESS of INDUSTRY, 8vo. (pp. 29), unbound, Is Qd 1851 



13425 On the NiTROPRUSSJDES, a NEW CLASS of SALTS, 4to. (pp. 42), seivn, 5s 1849 



13426 ANOTHER COPY, sewn, ivith author's inscr., Qs 



'His most important investigations are those on the nitroprussides, a new class of salts which he discovered, 

 etc.' D. N. B. 



13427 NOTE on some NUMERICAL RELATIONS between the SPECIFIC GRAVITIES of the DIAMOND, 



GRAPHITE, and CHARCOAL FORMS of CARBON, and its ATOMIC WEIGHT, 8vo. (pp. 8), sewn, Is Qd 



[Edin., 1860] 



13423 [PRESIDENTIAL] ADDRESS to the BRITISH ASSOCIATION for the Advancement of Science, 



8vo. (pp. 26), sewn, Is Qd 1885 



13429 , and James Alfred WANKLYN, F.R.S.E. : On a MODE of taking the DENSITY of 



VAPOUR of VOLATILE LIQUIDS, at Temperatures below the Boiling Point, with, 2 woodcuts, 4to. 

 (pp. 25), sewn, 3s Edin., 1S61 



THE FIRST GRAPHIC. STATISTICS : 



13430 PLAYFAIR (William, Inventor of this Method of stating Accounts) LINEAL ARITHMETIC, 

 applied to shew the PROGRESS of the COMMERCE and KEVENUE of ENGLAND during the Present 

 Century, with 33 copperplates of graphic statistics (mostly COLOURED), 8vo. old sheep (binding 

 damaged), 10s Qd 1798 



' Not arithmetic, but plates arranging the several matters in curves, in the manner now much more familiar than it 

 was then.' Prof, de Morgan. 



The book is probably the first instance of the use of graphic statistics, of which in the preface the author claims to be 

 the inventor. He was the younger brother of John Playfair the geologist, and had a struggling, rough and tumble life, 

 from his first employment as a draughtsman at Boulton and Watt's to his death in London in 1S23. He was in Paris in 

 1789 and probably took part in the taking of the Bastille, but afterwards quarrelled with the Revolution. The above 

 work is not mentioned in D. N. B., but has peculiar interest in connexion with the invaluable method which it introduced, 

 and which was apparently still little used in Prof, de Morgan's day. It was employed however to fine effect by FLORENCE 

 NIGHTINGALE, who found her ' coxcombs ' trump cards against Lord Panmure, and the best of all means of bringing the 

 state of the Army in barracks home to the English people. 



>1343l PLUCHl (Abbe Noel Antoine) The HISTORY of the HEAVENS, considered according to the 

 Notions of the Poets and Philosophers, compared with the DOCTRINES of MOSES, translated by 

 J. B. DE FREVAL, with numerous copperplates. 2 vols. Svo. old calf, Qs Qd 1740 



' La premiere partie est presque une mythologie complete, fondee sur des idees neuves, mais simples et ingenieuses ; la 

 seconde partie est 1'histoire des idees philosophiques sur la formation du monde.' Biogr. Gen. 



13432 [ ] SPECTACLE de la NATURE : or NATURE D.SPLAY'D: Discourses on such Particulars of 



Natural History as were thought most proper to excite the Curiosity, and form the Minds of 

 Youth, translated from the original French by [SAMUEL] HUMPHREYS, 4th Edition, with numer- 

 ous folding copperplates, Q vols. 8vo. old calf (cracked), 17s Qd 1740 



'Ouvrage'instructif et agr6able. . . . C'est un tableau vivant et anime de 1'ceuvre de la creation '.Biogr. Gen. The 

 work is dedicated to the youthful William Augusta*. Duke of Cumberland, known after 1746 as ' the Butcher'. 



13433 POCHHAMNER (Leo August; Univ. Kiel) 'Ueber KELATIONEN zwischen HYPERGEO- 

 METRISCHEN INTEGRALEN N TER ORDNUNG, 4to. (pp. 24), *ewn, 2* [Berlin, 1870] 



13434 De SUPERFICIEI UNDARUM DERIVATIONE : Dissertatio Inauguralis. 4to (pp. 26), sewn, 



2s ibidem [1863] 



