HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 249 



4878 TODHUNTER (Isaac, F.R.S.) ELEMENTARY TREATISE on LAPLACE'S FUNCTIONS, LAME'S 

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4879 - ANOTHER COPY, hf. calf gilt (a few II. slightly wormed), 1. 5s 



' The work may be regarded both as an account of the Functions to which it is specially devoted, and also as a con- 

 tinuation of the two volumes on the Differential and Integral Calculus respectively [qq. v. infra] ; the three together 

 form a connected treatise on the higher department of pure mathematics." Intro. 



4880 ELEMENTARY TREATISE on the THEORY of EQUATIONS, with a Collection of Examples, 



post 8vo. cl., 2s Cambridge, 1861 



4881- SECOND EDITION, revised, post 8vo. cl., 2s Qd 1867 



4882 - THIRD EDITION, post 8vo. cl., 3s (p. 7s Qd) 1875 



4883 - The ELEMENTS of EUCLID, with Notes, Appendix, and Exercises ; new Ed. by S. L. LONEY, 

 with diagrams: Key to the Exercises 2 vols. post 8vo. cl., 5s Qd (p. 11*) 1899-88 



4884 HISTORY of the MATHEMATICAL THEORIES of ATTRACTION, and the FIGURE of the 



EARTH, from Newton to Laplace, with diagrams, 2 thick vols. 8vo. cl. (VERY SCARCE), 3. 35 1873 

 4885 ANOTHER COPY, hf. morocco, 3. 



An invaluable work, the first comprehensive history on the subject. ' Although much has been published on the 

 History of Astronomy, yet the progress of the mathematical development on the history of attraction has been left almost 

 untouched.' Preface. 



4886 HISTORY of the MATHEMATICAL THEORY of PROBABILITY, from Pascal to Laplace, thick 



8vo. cl., uncut, or, hf. morocco gilt (VERY SCARCE), 2. 2s Cambridge, 1865 



4887 - - ANOTHER COPY, brown prize calf extra (FINE COPY), 2. 7s Qd 



The only important history of the theory of probability extant, and like Dr. Todhunter's other historical works, of 

 great value also from a bibliographical point of view. 



4888 HISTORY of the PROGRESS of the CALCULUS of VARIATIONS during the XIXTH CENTURY, 

 with folding plate, 8vo. cl., uncut, with author's inscr. (VERY SCARCE), 2. 5s ibidem, 1861 



4889 ANOTHER COPY, hf. calf, 2. 



4890 - ANOTHER COPY, new hf. brown calf extra, uncut, t. e. g., 2. 7s Qd 



4891 - HISTORY of the THEORY of ELASTICITY, and of the STRENGTH of MATERIALS, from 

 Galilei to the present Time ; edited and completed bv KARL PEARSON, F.R.S. , with plates and 

 woodcuts, 2 thick vols. 8vo. in 3, cl., uncut, 1. 12s 60? (p. 2. 15s) ibidem, Univ. Press, 1886-93 



4892 VOL. I ONLY : from Galilei to Saint-Venant (1639-1850), with plates and woodcuts, thick 



8vo. cl., 12s Qd (p. 1. 5s) 1885 



4893 PLANE TRIGONOMETRY, with numerous Examples, 8th Ed., with diagrams, post 8vo. 



cl., 2s Qd (p. 5s) 1880, or '4 



4894 ANOTHER COPY, with Key, 2 vols. post 8vo. cl., 7s Qd (p. 15s 60?) 1884-79 



4895 RESEARCHES in the CALCULUS of VARIATIONS, principally on the THEORY of DIS- 

 CONTINUOUS SOLUTIONS (Adams Prize Essay, 1871), 8vo. new hf. calf extra, uncut, t. e. g. (a few 

 slight wormholes), 1. 7s Qd 1871 



' His most original work.' J. Bass Mulllinger. 



' A most important research, developing the theory of discontinuous solutions (discussed in particular places by 

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4896 SPHERICAL TRIGONOMETRY, with numerous Examples, diagrams, post 8vo. cl., 2s 



Cambridge, 1859 



4897 NEW EDITION, enlarged, post 8vo. cl., 2s Qd 1871, or '8 



4898 - TREATISE on ANALYTICAL STATICS, with numerous Examples, 2nd Ed., enlarged, with 

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4899 - THIRD EDITION, enlarged, with diagrams, post 8vo. cl., 4s (p. 10s Qd) 1866 



4900 - TREATISE on the DIFFERENTIAL CALCULUS, with numerous Examples, 5th [FINAL! 

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4901 SIXTH EDITION [unaltered], with diagrams, post 8vo. cl., 5s (p. 10s Qd) 1873 



4902 SEVENTH EDITION [unaltered], with diagrams, post 8vo. cl., 5s Qd (p. 10s Qd) 1875 



4903 NEW EDITION [unaltered], with diagrams: Key by H. ST. J. HUNTER, with diagrams 



2 vols. post 8vo. cl., 12s (p. 1. Is) 1890-88 



4904 TREATISE on the INTEGRAL CALCULUS and its Applications, with numerous Examples', 



3rd Ed., enlarged, with diagrams, post 8vo. hf. calf, 4s 1868 



4905 - FOURTH EDITION, revised and enlarged, with diagrams, post 8vo. cl., 4s Qd (p. 10s Qd) 1874 



4906 FINAL EDITION [enlarged], with diagrams, post 8vo. cl., Qs (p. 10s 60?) 1891 



4907 - ANOTHER COPY, with "Key by H. ST. J. HUNTER, with diagrams, 2 vols. post 8vo. cl., 

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4908 TREATISE on PLANE CO-ORDINATE GEOMETRY as applied to the Straight Line and the 



CONIC SECTIONS, with numerous Examples, 5th Ed., with diagrams, post 8vo. cl., 3s Qd 

 (p. 7s Qd) 1874 



WILLIAM WHEWELL, D.D. : an Account of his Writings v. WHEWELL, post. 



' Todhunter's sustained industry and methodical distribution of his time enabled him to acquire a wide acquaintance 

 with general and foreign literature ; and besides being a sound Latin and Greek scholar, he was familiar with French, 

 German, Spanish, and Italian, and also with Russian, Hebrew, and Sanskrit. He was well versed in the history of 

 philosophy ; his habits and tastes were singularly simple ; and he was not without considerable humour.' J. Bass 



Mullinger. 



4909 TOLHATJSEN (Alexander und Louis) TECHNOLOGISCHES WORTERBUCH in franzosischer, 

 deutscher und englischer Sprache, Bd. Ill : DEUTSCH-ENGLISCH-FRANZOSISCH, 2. Auflage, large 

 12mo. (pp. 960), hf. German morocco gilt, 4s (p. M. 8 sewn) Leipzig, 1882 



4910 TOMLINSON (Charles, F.R.S.) CYCLOPEDIA of USEFUL ARTS, Mechanical and Chemical, 

 Manufactures, Mining, and Engineering, with 40 fine steel plates, and 2477 woodcuts* 2- thick vols. 

 impl. 8vo. hf. calf antique, 7s Qd (p. 2. 5s) 1854s 



Of historical interest, illustrating every variety of contemporary machinery. 



