HENRY SOTHEEAN & CO., 140, STEAND W.C., AND 43, PICCADILLY, W. 537 



10779 L'EVEILL^ ( , des Fonts et Chaussees) Des PENTES et RAMPES sur les CHEMINS de FER ; 

 with folding plate, 8vo. (pp. 43), sewn, 5s 1847 



A mathematical study of the relation of gradients to curves and to the heavier trains and swifter and more powerful 

 locomotives then coming into use. 



10780 [LEVY (A., F.G.S.)] DIFFERENTIAL and INTEGRAL CALCULUS (Encyclopaedia Metropolitana) ; 

 4to. hf. cl., 3s [1830] 



10781 ANOTHER COPY, with INTEGRAL CALCULUS [continued, and with its Applications], 



plate, 2 vols. 4to. unbound, 4s [1830] 



10782 ; ANOTHER COPY OF BOTH WORKS, in one vol. 4to. hf. cl., 5s 



10783 LEVY (Lucien) La PRATIQUE du MALTAGE ; with folding plate, and 53 illustrations, 8vo. cl., 

 3s 6d f (p. F. 7 nett) 1899 



10784 LEVY (Maurice) La STATIQUE GRAPHIQUE, et ses Applications aux Constructions; with 

 Atlas, containing 24 folding plates, 2 vols. roy. 8vo. sewn, Is (p. F. 16.50) 1874 



10785 LEWIS (Rt. Hon. Sir George Cornewall) HISTORICAL SURVEY of the ASTRONOMY of the 

 ANCIENTS, thick 8vo. cl., uncut (SCARCE), 18* 6d 1862 



'Applying a sceptical analysis to the ambitious Egyptology of Bunsen.' Ency. Brit. It consists of the following 

 chapters : Primitive Astronomy of the Greeks and Romans ; Philosophical Astronomy of the Greeks from Thales to 



Democritus; Scientific Astronomy of the Greeks from Plato to Eratosthenes; of the Romans from 



Hipparchus to Ptolemy ; Astronomy of the Babylonians and Egyptians ; Early History and Chronology of the Egyptians 

 and Assyrians ; and Navigation of the Phoenicians. 



10786 LEWIS (Gilbert Newton) The OSMOTIC PRESSURE of CONCENTRATED SOLUTIONS, and the 

 Laws of the Perfect Solution, roy. 8vo. (pp. 16), sewn, Is [Ea&ton, Mass., 1908] 



10787 LEWIS (Major J. F., R.E.) PERMANENT FORTIFICATION for English Engineers, with 43 

 folding plates, thick 8vo. hf. calf, 5s (p. 10s d nett) Chatham, 1890 



10788 LEWIS (Walter and Thomas) MODERN ORGAN BUILDING, with especial Regard to 

 PNEUMATIC ACTION ; including Chapters on Tuning, Voicing, etc., with 76 illustrations (many 



full-page), 4to. cl., t. e. g., 4s (p. 7s 6d) 1911 



10789 LEWIS (William, M.D., F.R.S.) COMMERCIUM PHILOSOPHICO-TECHNICUM ; or the Philo- 

 sophical Commerce of Arts : designed as an Attempt to improve Arts, Trades, and Manufactures, 

 withfine folding front, on copper by P. C. CANOT, A.R.A., of a contemporary chemical laboratory, 

 and 5 other copperplates, thick 4to. old calf (binding damaged), with armorial bookplate of 

 Charles Spooner (mezzotint engraver, d. 1767), 12s 6c? 1763 



10790 ANOTHER COPY, old tree-calf gilt, or, hf. white vellum, los 



Consisting of the following chapters : Description of a Portable Ftirnace for making Experiments : History of Gold, 

 and the various Arts and Businesses depending thereon : Experiments of the Conversion of Glass Vessels into Porcelaine, 

 and for establishing the Principles of the Art : Of the Expansion and Contraction of certain Bodies at the time of their 

 passing from a Fluid to a Solid State : Of the Blowing of Air into Furnaces by a Fall of Water : History of Colours [Dyes 

 and Inks] : History of Platina : Appendix. 



10791 LEWKOWITSCH (Julius) The LABORATORY COMPANION to FATS and OILS INDUSTRIES, 

 large 8vo. cl., 4s (p. 6s nett) 1901 



10792 L'HOSPITAL (Guillaume Frai^ois Antoine, Marquis de St.-Mesme) ANALYSE des 

 INFINIMENT PETITS, pour 1'Intelligence des Lignes Courbes; 2 e Edition ; with numerous plates, 

 4to. large copy in contemporary calf, with fine Chippendale bookplate of William Abbot, St. John's 

 Coll., Cantab. (Senior Wrangler in 1754), and another of Prof . Turner, F.R.S., Is Qd 1716 



10793 ANOTHER COPY, hf. calf gilt, with auto., dated 1728, and sheet of MS. notes of 



G. L. Leclerc Comte de Buffon (the naturalist), also an interesting letter from the COMTESSE 

 DE BUFFON (his daughter -in law], and bookplate of Frederick Hendricks, F.S.A., 1. 15s 



' Containing a partial investigation of the limiting value of the ratio of functions which for a certain value of the variable 

 take the indeterminate form of : 0. This work brought the differential notation into general use in France, and helped 

 to make it known in Europe.' W. W. R. Ball. 



It was the first, and for a long time the only, treatise on the calculus, explaining it in an intelligible manner not to be 

 found in most subsequent treatises a failing perpetuated in many a modern text-book on the calculus. 



10794 TRAITE ANALYTIQUE des SECTIONS CONIQUES et de leur Usage pour la Resolution des 



Equations dans les Problcmes tant determinez qu' inde'tenninez ; Ouvrage posthume, premiere 

 edition ; with numerous plates, 4to. old calf (joints cracked), with Chippendale bookplate of W. 

 Abbot, and of Prof . Turner, F.R.S. , 8s Qd ' 1707 



' For nearly a century it was deemed a standard work on the subject.' W. W. R. Ball. 



10795 LIAGRE (Lt.-Gen. Jean Baptiste Joseph) CALCUL des PROBABILITES et THEORIE des 

 ERREURS, avec APPLICATIONS aux Sciences d'Observation en general et a la GEODESIE en parti- 

 culier, 2 e [derniere] Edition par CAMILLE PENY ; with diagrams, thick sq. 8vo. sewn (title and a 

 few II. foxed) ; SCARCE, 18s Qd Bruxelles, 1879 



Especially valuable for applying the theory of probabilities to geodetic problems. 



10796 LIBRARY of USEFUL KNOWLEDGE : MATHEMATICS, with numerous diagrams, 2 vols. 

 8vo. cl., Is 6d 1836 



10797 ANOTHER COPY, 2 vols. in 1, hf. russia (joints cracked), 6s 6d 



CONTENTS : I. Study and Difficulties of Mathematics [by AUGUSTUS DE MORGAN] : Arithmetic and Algebra : Examples 

 of the Processes of Arithmetic and Algebra. II. Geometry, Plane, Solid, and Spherical, by PIERCE MORTON ; Elements 

 of Trigonometry, by W. HOPKINS : Spherical Trigonometry, by A. HE MORGAN ; Algebraical Geometry, by S. W. WAUD. 



10798 : NATURAL PHILOSOPHY, with Explanation of Scientific Terms, and Index, with 



numerous woodcuts and diagrams, 4 vols. 8vo. cl., 10s Qd (p. 1. 18s) 1829-38 



10799 ANOTHER COPY, 4 vols., hf. calf, 12s 



10800 VOLS. I III ONLY, 3 vols. 8vo. hf. calf, 7s Qd 1829-34 



CONTENTS: I. Objects, Advantages, and Pleasures of Science : Mechanics: Hydrostatics: Hydraulics: Pneumatics: 

 Heat : Optics : Double Refraction and Polarisation. II. Newton's Optics : Optical Instruments : Thermometer and 

 Pyrometer: Electricity: Galvanism: Magnetism: Electro-Magnetism. III. Astronomy: History of Astronomy : 

 Mathematical Geography : Physical Geography : Navigation. IV. Chemistry : Botany : Animal Physiology : Animal 

 Mechanics. 



