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



7692 ETJLEB (Leonhard; f.r.s.) Introductio in Analysin Infinitorum, editio princeps; with 



frontispiece and 40 plates, 2 vols. 4to. old calf, \2s Qd Lausannce, 1748 



7693 Another Copy, loith fine portrait of J. J. d' Ortous de Mairan {dedicatee) hy Ficquet, 



INSERTED, 2 vols. 4to. in 1, old calf {back slightly damaged), 14* 



' Edition preferee a la r6iinpression faite a Lyon 1797.'— Brunei. 



7694 Editio Nova ; with 16 plates, 2 vols. 4to. cl. {wanting plates 17-40), 6* 6d Lugduni, 1797 



* A work that caused a revolution in analytical mathematics, a subject which had hitherto never been presented in 

 so general and systematic manner '.—Prof. Cajori. 



' In the course of this analysis Euler laid down the rules for the transformation of co-ordinates in space. Here also we 

 lind the earliest attempt to bring the curvature of surfaces within the domain of mathematics, and the first complete 

 discussion of tortuous curves '.— W. W. R. Ball. 



7695 Letters to a German Princess, on Different Subjects in Physics and Philosophy, trans- 

 lated by Henry Hunter, d.d., with Original Notes, and Glossary of Foreign and Scientific 

 Terms, tvith 17 plates, 2 vols. 8vo. SOUND COPY in contemporary hf. mottled calf, Is 1795 



The above copy belonged to Richard Watson, f.r.s. (1737-1816), absentee Bp. of Llandaff, and sometime Professor of 

 Chemistry at Cambridge, and bears his Calgarth Park booklabel. 



7696 Another Copy, contemporary tree- calf gilt {fine copy), with bookplate of Sir Whittaker 



Ellis, Is 6c? 



A masterly elementary exposition of physics, which 'for half a century remained a standard treatise on the subject'.— 

 W. W. R. Ball. 



7697 Mechanica, sive Motus Scientia analytice exposita ; with 32 plates, 2 vols. 4to. old 



calf, Us Petropoli, 1736 



The first work which applied analysis to the study of mechanics. ' He worxed out the theory of the rotation of a 

 body round a fixed point, established the general equations of motion of a free body, and the general equation of 

 hydrodynamics. He solved an immense number and variety of mechanical problems which arose in his mind on all 

 occasions',— Pro/. Cajori. 



'The foundations of analytical mechanics were laid by Buler in his Mechanica, 1736'.— E. Mach. 



7698 Mechanik, Oder analytische Darstellung der Bewegung, mit Anmerkungen und Erlau- 



terungen herausg. von J. P. WOLFERS ; with 12 plates, 2 vols. 8vo. hf calf, 45 Greifswald, 1848-50 



7699 Novae Tabulae Lunares Sin^ulari Methodo constructae, quarum Ope Loca Lunae 



ad quodvis Tempus expedite computare licet [accedunt La Caillii Tabulse Solares, et ToBi^ 

 Mayeri Tabulae Motuum Mediorum Lunae], large 8vo. nice copy in contemporary calf gilt, with 

 booklabel of George Eennie, F.E.S. {rare), 8s 6d ~ Petropoli, 1772 



The remarkable achievement of Euler in his blind old age. 



7700 Opuscula Analytica ; with 2 plates, 2 vols. 4to. in 1, fne copy in old calf (rare), 



£1. 55 ib., 1783-5 



7701 Scientia Navalis, seu Tractatus de Construendis et Dirigendis Navibus ; with 65 



folding plates, 2 vols. 4to. contemporary calf {fine copy) ; RARE, £1. 10* ib., 1749 



This work first expresses mathematically the resistance meeting a ship on its path through the water. 



7702 — Tentamen Novae Theoriae Musicae ex certissimis Harmoniae Principiis dilucide 



expositse ; with folding plates and tables, 4to. hf roan neat (very rare), £1. 15* ib., 1739 



The first systematic treatise on music on a physical basis. 



7703 Theoria Motuum Lun^e, exhibens omnes eius Inrequalitates, in Additamento hoc idem 



Argumentum aliter tractatur, simulg^ue ostenditur quemadmodum Motus Lunse cum omnibus 

 Insequalitatibus innumeris aliis Modis repraesentari atque ad Calculum revocari possit, editio 

 princeps ; vnth plate, 4to. tree-calf {fine copy), \0s Qd ib., 1753 



7704 — - — Idem ; cum Additamentis Editionis Nov^, viz. : Evolutio Numerica ^Equationum 

 pro iis Membris Coordinatarum x et y, quorum Characteres involvunt ii ; Comparatio Formularum 

 Inventarum cum Tabulis A. C. de Clairault; Constructio Tabularum Astronomicarum ex 

 Formulis supra inventis ; with plate, 2 vols. 4to. contemporary mottled calf gilt {nice copy), I7s Qd 



ib., 1753-72 



7705 Editio Nova [cum Additamentis {qq. v. supra)] ; with plate, thick 4to. contemporary 



French calf gilt {sound copy), 15s ib., 1772 



' He was one of the first to take up with success the theory of the moon's motion by giving approximate solutions 

 to the^ problem of three bodies. He laid a sound basis for the calculation of tables of the moon. The researches on the 

 moon's motion, which captured two prizes, were carried on while he was blind, with the assistance of his sons and two of 

 his pupils '.—Prof. Cajori. 



' It was from Euler's results that Mayer constructed the lunar tables [r. Nos. 2934-5] for which his widow in 1770 

 received £5000. from Parliament ; and in recognition of Euler's services a sum of £300. was also voted as an honorarium 

 to him '.—W. W. R. Ball. 



7706 — — —Theoria Motus Corporum Solidorum seu Rigidorum, ex primis nostrae Cognitionis 

 Principiis stabilita et ad omnes Motus, qui in huismodi Corpora cadere possunt, accommodata ; 

 Editio nova, Supplementis locupletata et emendata [ex Recensione W. J. G. Karsten] ; with 

 18 plates, 4to. nice copy in contemporary marbled calf gilt (rare), 15* Gryphiswaldice, 1790 



' In seiner Theoria motus corporum solidorum erbrtert Euler den Begriff der Hauptaxen eines rotierenden Korpers in 

 unserer heutigen Weise.'— ^. HeUer. 



^^^^tT; Theorie der Bewegung fester und starrer Korper, mit Anmerkungen und 



Erlauterungen herausg. von J. P. Wolfers ; with 9 plates, 8vo. calf gilt, by C. Lewis, 4s ib., 1853 



Forming vol. IV. of the ' Mechanik.' 



n-rno '^^i^ True Principles of Gunnery, investigated and explained (1777)— v. No. 6539, ante. 



77U« : juss (Nicolas) Eloge de Li^oNARD Euler, avec une Liste Complete de ses 



Ouvrages, 4to. contemporary hf calf, 5s St. Pitersbourg, 1783 



7709 EVANS (J. H.) Ornamental Turning : a Work of Practical Instruction, with 17 plates, and 



192 other illustrations, 8vo. cl, 5s Qd (p. £1. Is) [1889] 



' '^" -—: — New Edition, with 20 plates, and 192 other illustrations, 3 vols. cr. 8vo. cl., Is (p. 10* U 



nett) 1903-4 



