122 HENRY SOTHERAN & CO., UO, 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. bs 1780-9 



2426 Volume I only, with folding plates, 4to. hf. calf [binding broken), 85 Qd 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 si)ecimens of its use were given in the first volume of his 

 'Mathematical Memoirs' (1780). 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. Gierke. 



2427 LANGMAID (J., r.n.), and H. QAISFOBD, r.n. : Elementary Lessons in Steam 

 Machinery and the Marine Steam Engine, with the (construction of a Battleship ; en- 

 larged Ed., with 62 plates, Svo. cL, ^s 6d (p. 6s nett) 1893 



2428 LANKTHEE (John, land agent) The Elements of Land Valuation, 8yo. cl., 2s Dublin, 1853 



2429 LANSBERG [recte LAENSBERGH] (Philips van) Opera Omnia ; ivith engraved title, fine 

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

 or, old calf gilt, £1. 1* Middelburgi Zelandice, 1663 



' Volume peu comraun '. — Brunei. It contains: Triangulorum Georaetria : Cyclometria Nova: Uranometria : In Quad- 

 rantem, turn Astronomicum, turn Goometricum, Introductio: Horologiographia Plana : Commentationes in Motuin Terrai 

 Diurnum : Tabulai Motuum Coelestium Perpetuae: Chronologia Sacra. 



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



2430 Bedenckingen op den Dageluckschen, ende Jaerlijckschen Loop van den Aerdt- 



KLOOT ; niitsgaders op de ware Afbeeldinge des sienelijcken Hemels ; ivith folding plate, and wood- 

 cuts, sm. 4to. old hf. parchment, Qs Qd ibidem, 1650 



2431 Tabulae Motuum Coelestium Perpetu^ ; ex omnium Temporum Observationibus 



constructai, Teniporumque omnium Observationibus consentientes, item Novae et Genuinse Motuum 

 Coelestium Theoricoe, et Astronomicarum Observationum Thesaurus, editio princeps; loith 

 brilliant impressions of the finely engraved title containing S portraits of celebrated astronomers 

 and the portrait by W. Delff ; also woodcuts and diagrams, folio, old parchment (RARE), £1. 5* 



^6., 1632 

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



2432 Triangulorum Geometric Libri IV, in quibus novfi et perspicua methodo Triangulorum 



Doctrina explicatur [accedit Canon Logarithmicus], editio princeps; ivith woodc7its and 

 diagrams, sm. 4to. sewn {browned and title slightly mended) ; rare, 155 



Lugd. JBatav., ex off. Plantiniana, 1591 



2433 Editio Secunda, aucta ; printer^s device on title, vignettes, and numerous diagrams, 



sm. 4to. new hf. roan neat {fine copy) ; rare, ivith numerous MS. additions in a contemporary hand, 

 and auto. ofFrof. A. W. Williamson, F.E.S., 8s Amsterdam, W. Blwuw, 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. 



2434 LAPLACE (Pierre Simon Marquis de) Q^uvres: Traite de Mecanique Celeste [avec 

 les 4 Supplements], 2^ Ed., conforme a la premiere (Tom. 3 h, 5 premiere edition), 5 v., 

 '29-02-25 : EXPOSITION du Systi^me du MONDE, 5^ Ed., augmentee ; uuth portrait, '94 : Theorie 

 Analytique des Probabilites, 3^ Ed., augmentee, avec les 4 Supplements, '20[-5]— 7 vols. 4to. 

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



presentation copy from TALLEYRAND TO THE DUKE OF GLOUCESTER: 



2435 Exposition du Systeme du Monde, 4^ Ed., revue et augmentee par I'Auteur ; iciih fine 



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



' Given to the Duke of Gloucester at Paris by Prince Taleyrand [sicl. Feb.y lSl9.'—Inscr. on flyleaf. 



2436 Cinquieme Edition, revue et augmentee par I'Auteur ; with engraved portrait, 4to. hf. 



morocco gilt, 10s , 1824 



2437 SixiiiME Edition [Edition-facsimile publiee par I'Acad^mie des Sciences], roy. 4to. sewn, 



12s (p. ¥. 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 the French Academy, It also contains liis celebrated nebular hypothesis. 

 ' A very clear popular exposition of the laws of the celestial motions.'— i'ro/. ^. 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® Ed., revue et augmentee par I'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]. Febx. 1S19.'— Ju^cr. on flyleaf. 



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

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

 method of loa.=t squares.'— Pro/. Cajori. It also formulates Laplace's theory of generating functions. 



PRESENTATION COPY FROM TALLEYRAND TO THE DUKE OF GLOUCESTER : 



2140 Traite de Mecanique Celeste [avec les 4 Supplements], premiere edition, 5 vols. 



4to. old hf calf {binding of v. 1 cracked), with Sandhurst College bookplate (very rare), £3. 35 



An F// [1798-]] 825 

 ' Given to tlie Duke of Gloucester at Paris by Prince Taleyrand [_sic]. FebJ. 1819.'— Jjjso'. on flyleaf. 

 'Selon M. A. Maury des fautes graves se sont glissees dans Timpression de la nouvelle edition, et laissent ainsi i la 

 premiere toute sa rarete et tout son prix.' — Biogr. Gen. , 



24il Le MfiME (Tomes I et II, 2^ Ed., Ill a V, premiere edition), avec tons les 



Supplements, 5 vols. 4to. hf calf {nice copy), £1. 10* , 1829-5 



2442 QuATRiEME Edition, reimprim^e d'apres I'Edition princeps de 1798-1825, sous les 



Auspices de I'AcadeMie des Sciences ; with finely engraved portrait, 5 vols. 4to. hf cl., £3. 

 (p. F. 100. nett unbound) 1878 



2443 Another Copy, 6 vols, hf, morocco gilt, uncut, t. e. g., £3. 15* 



