122 HENRY SOTHERAN & CO., HO, STRAND, W.C., AND 37, PICCADILLY, W. 



2425 LANDEN (John, F.R.S.) MATHEMATICAL MEMOIRS respecting a Variety of Subjects; with 

 Appendix containing Tables of THEOREMS for the CALCULATION of FLUENTS, 11 vlates, 2 vols. 

 4to. in 1, sound copy in calf gilt (RARE), 1. 5s 1780-9 



2426 VOLUME I ONLY, with folding plates, 4to. hf. calf (binding broken), 8s 6d 1780 



' The remarkable theorem known by Landen's name, for expressing a hyperbolic arc in terms of two elliptic arcs, was 



inserted in the 'Philosophical Transactions' for 1775, and specimens of its use were given in the first volume of his 

 ' Mathematical Memoirs ' (17SO). In a paper on rotary motion he obtained results differing from those of Euler and 

 D'Alembert, and defended them in the 2nd volume of Mathematical Memoirs. In the same work he solved the problem of 

 the spinning of a top, and explained Newton's error in calculating the effects of precession '. Agnes M. Clerlw. 



2427 LANGMAID (J., R.N.), and H. GAISFORD, R.N. : ELEMENTARY LESSONS in STEAM 

 MACHINERY and the MARINE STEAM ENGINE, with the CONSTRUCTION of a BATTLESHIP ; en- 

 larged Ed., with 62 plates, 8vo. cl., 3s 6d (p. 6s nett) 1893 



2428 LANKTREE (John, land agent) The ELEMENTS of LAND VALUATION, Svo. cl., 2s Dublin, 1853 



2429 LANSBERG (recte LAENSBERGH] (Philips van) OPERA OMNIA ; with engraved title, fine 

 portrait by W. Delff, folding plates, and numerous woodcuts and diagrams, thick folio, old vellum, 

 or, old calf gilt, 1. Is Middelburgi Zelandice, 1663 



' Volume peu commun '. Brunei. It contains: Triangulorum Geometria : Cyclometria Nova: Uranometria : In Quad- 

 rantem, turn Astronomicum, turn Geometricum, Introductio : Horologiographia Plana : Commentationes in Motum Terra} 

 Diurnum : Tabulae Motuum Coelestium Perpetuae : Chronologia Sacra. 



' On y trouve de fort bonnes choses.' Montuda. 



2430 BEDENCKINCEN op den DAGELIJCKSCHEN, ende JAERLIJCKSCHEN LOOP van den AERDT- 



KLOOT ; mitsgaders op de ware Afbeeldinge des sienelijcken Kernels ; with folding plate, and wood- 

 cuts, sm. 4to. old hf. parchment, 6s 6d ibidem, 1 650 



2431 TABULAE MOTUUM COZLESTIUM PERPETUAE ; ex omnium Temporum Observationibus 



constructse, Tempprumque omnium Observationibus consentientes, item Novae et Genuinae Motuum 

 Coelestium Theoricse, et Astronomicarum Observationum Thesaurus, editio princeps; with 

 BRILLIANT IMPRESSIONS of the finely engraved title containing 8 portraits of celebrated astronomers 

 and the portrait by W. Del/; also woodcuts and diagrams, folio, old parchment (RARE), 1. 5s 



ib., 1632 

 First Edition of this once celebrated work, which was intended to supersede Kepler's Rudolphine Tables. 



2432 TRIANGULORUM GEOMETRIC Libri IV, in quibus nova et perspicua methodo Triangulorum 



Doctrina explicatur [accedit CANON LoGARiTHMicus], editio princeps; with woodcuts and 

 diagrams, sm. 4to. sewn (browned and title slightly mended) ; rare, los 



Lugd. Batav., ex off. Plantiniana, 1591 



2433 EDITIO SKCUNDA, aucta ; printer's device on title, vignettes, and numerous diagrams, 



sm. 4to. new hf. roan neat (fine copy] ; rare, with numerous MS. additions in a contemporary hand, 

 and auto, of Prof. A. W. Williamson, F.R.S. , 8s Amsterdam, W. Blccuw, 1631 



One of the earliest trigonometrical canons, 'a brief, but very elegant work ; the whole being clearly explained : and it is 

 perhaps the first set of tables titled with those words.' Hutton. 



ANALYTIQUE des PROBABILITES, 3 e Ed., augmentee, avec les 4 Supplements, '20[-5] 7 vols. 4to. 

 uniformly bound in hf. calf, 2. 15s 1802-29 



PRESENTATION COPY FROM TALLEYRAND TO THE DUKE OF GLOUCESTER: 



2435 EXPOSITION du SYSTEMS du MONDE, 4 e Ed., revue et augmentee par 1'Auteur ; with fine 



portrait, 4to. old hf. calf, with Sandhurst College bookplate, 10s 1813 



' Given to the Duke of Gloucester at Paris by Prince Taleyrand [sic]. Feb.r 1819.' Inscr. on flyleaf. 



2436 CINQUIEME EDITION, revue et augmentee par 1'Auteur ; with engraved portrait, 4to. hf. 



morocco gilt, 10s , 1824 



2437 SIXIEME EDITION [Edition-facsimile publiee par 1'ACADEMIE des SCIENCES], roy. 4to. sewn, 



12s (p. F. 20. nett) 1884 [Reprint of} 1835 



This work contains, as an introduction, a concise history of astronomy, considered a masterpiece of French literature, 

 which procured his admission to thn French Academy. It also contains his celebrated nebular hypothesis. 

 ' A very clear popular exposition of the laws of the celestial motions.' Prof. S. Newcomb. 



2438 - MEMOIRE sur les MOUVEMENS de la LUMIERE dans les MILIEUX DIAPHANES ; with plate, 

 4to. (pp. 44), sewn (rare), 12s 1810 



PRESENTATION COPY FROM TALLEYRAND TO, THE DUKE OF GLOUCESTER : 



2439 - THEORIE ANALYTIQUE des PROBABILITES, 2 e Ed., revue et augmented par 1'Auteur; avec 

 2 Supplements in 1 vol. 4to. old hf. calf, with Sandhurst College bookplate, 15s 1814-18 



' Given to the Duke of Gloucester at Paris by Prince Taleyrand [sic]. Feby. 1819.' Inscr. on flyleaf. 



'The introduction (pp. cvi) is an admirable and masterly exposition without the aid of analytical formula? of the 

 principles and applications of the science. One of the most important parts is the application of probability to the 

 method of least squares.' Pro/. Cajori. It also formulates Laplace's theory of generating functions. 



PRESENTATION COPY FROM TALLEYRAND TO THE DUKE OF GLOUCESTER : 



2*40 TRAITE de MECANIQUE CELESTE [avec les 4 Supplements], premiere edition, 5 vols. 



4to. old hf. calf (binding ofv. 1 cracked), with Sandhurst College bookplate (VERY RARE), 3. 3s 



' Given to the Duke of Gloucester at Paris by Prince Taleyrand [sic]. Febr. 1819.' Inscr. on flyleaf. 

 'Selon M. A. Maury des fautes graves se sont Rlissees dans I'imprcssion de la nouvelle edition, et laissent ainsi a la 

 premiere toute sa rarete et tout son prix.' fiinyr. Gi-n. 



2441 - - LE MEME (Tomes I et II, 2" Ed., Ill a V, premiere edition), avec tous les 

 Supplements, 5 vols. 4to. hf. calf (nice copy}, 1. 10s , 1S29-5 



2442 - QuATRlEME EDITION, reimprimle d'apii-s 1'Edition princeps de 1798-1825, sous les 

 Auspices de TACADEMiE des SCIENCES ; with finely engraved portrait. 5 voK 4to. hf. cl, 3. 

 (p. F, 100. nett unbound) 1878 



2443 ANOTHER COPY, 5 vol*. hf. morocco gilt, uncut y t, e, g. } 3. 15* 



