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



2690 LONGFIELD (Mountifort ; Q.C., Judge oj the Landed Estates Court) Elementary Treatise 

 on Series, 8vo. cl. {scarce), 4* Dublin, 1872 



This work was unknown to the author's biographer in D. N. B. 



2691 LONGKIDGE (James Atkinson, m.i.c.e.) The Artillery of the Future, and the New 

 [SxMOKELESS] Powders, diagrams, 8vo. d. {ont of print), Zs 6rf 1891 



Advocating high pressure in strong and comparatively short guns. 



2692 LOOMIS (Elias, Yale Univ.) Elements of the Differential and Integral Calculus, 

 revised Ed., with diagrams, 8vo. sheep {rubbed), 4^ Neiv York, 1874 



2693 Introduction to Practical Astronomy, with Collection of Astronomical Tables, 



5th Ed., diagrains, roy. 8vo. cl., uncut, Zs ibidem, 1865 



2694 Seventh Edition, diagrams, roy. 8vo. sheep (back damaged), 35 ib., 1868 or '72 



'The best Avcrk of the kind in the English tongue '.—/. P. Nichol, LL.D. 'Containing much information for the 

 amateur astronomer '.—Simon Newcomb. 



2695 The Recent Progress of Astronomy, especially in the United States, third Ed., 



re-written and much enlarged, illustrated, 8vo. cl. (out of print), 5s ib., 1856 



'The work is clearly written, popular, but still with a precision which pronounces the author equal to his task.' — 

 WeMinirister Rev. 



2696 LORENTZ (H. A., Leyden) SichtbARE und UnsichtbaRE Bewegungen ; with 40 illus- 

 trations, 8\o. sewn, 2s (p. M. 3.) Braunschweig, 1902 



2697 LOBENZ (Hans) Neuere Kuhlmaschinen, ihre Konstruktion, Wirkungsweise und 

 industrielle Verwendung ; illustrated, post 8vo. cl., 2s 6d (p. M. 5.) MUnchen, 1896 



2698 LORENZ (Ludvig* Valentin) GEuvres Scientifiques, revues et annot^es par H. Valen- 

 TINER : Tome II, 2^ fascicule (Vie de I'auteur ; d^veloppement des fonctions au moyen d'integrales 

 d^finies ; theoreme sur la fonction potentielle ; revaluation des aires, etc. etc.) ; with portrait, 

 8vo. sewn, Ss 6d Copenhague, 1904 



2699 LORENZINI (Lorenzo) Exercitatio Geometrica : in qua a^itur de Dimensione omnium 

 Conicarum Sectionum, Curvse Parabolicse, Curvaeque Superficiei Conoidis Parabolici, et 

 pra?cipue unica Enunciatione indicatur Centrum Gravitatis etc. etc. ; with 14 folding plates, 4to. 

 fine copy in hf. roan gilt, 10* 6g? Florentice, 1721 



This work was written during the author's 20 years' imprisonment at Volterra with no other help than his memory. 

 According to Wolf {Acta Eruditorum) it is superior to the works of ApoUonius of Perga and Viviani on the same subject. 



2700 LORIMER (John, m.d.) Concise Essay on Magnetism ; with the Declination and Inclination 

 of the Magnetic Needle, and an Attempt to ascertain the Cause of Variation thereof, with 

 fine portrait by Basire, and % folding copperplates, 4to. (pp. 49), sewn, 5s 1795 



2701 Ano-ther Copy, boards, uncut, with inscr. 'From the Author to General [Robert] 



Melville ' [F.E.S., inventor of a naval gun] , 6s 6d 



Containin^i an interesting ' Historical Account of the Discovery of Magnetism, and of the Magnetic Needle ' (pp. 11). 



2702 LOUIS (Henry, Durham Coll. of Science) Handbook of Gold Milling, front, from old print, 

 3 plates, and 120 woodcuts, thick cr. 8vo. cl., 5s (p. 10s nett) 1894 



2703 LOUREN^O (A. V., Lisbonne) Recherches sur les Composes Polyatomiques, 8vo. sewn, 

 with inscr. to Prof A. W. Williamson, F.B.S., 2s 1863 



2704 LOVE (Augustus Edward Hough, f.r.s.) Treatise on the Mathematical Theory of 

 Elasticity, diagrams, 2 vols. 8vo. cl., \0s (p. £1. 4^) University Press, Cambridge, 1892-3 



2705 LOVE (John) Geod^sia : or the Art of Surveying and Measuring of Land made easie, with 

 a more Facile and Sure Way of Surveying by the Chain, than has hitherto been taught ; also how 

 to lay-out New Lands in America, etc. etc., 2nd Ed., with Additions, diagrams, 8vo. old calf, 

 7s 6d 1715 



2706 Eighth Edition, corrected and improved by Samuel Clark, diagrams, 8vo. old calf 



{back damaged), 5s 1768 



2707 LOVIBOND (Joseph W.) Measurement of Light and Colour Sensations : a New Method 

 of Investigating the Phenomena of Light and Colour by means of the Selective Absorption in 

 Coloured Glass, graded into Scales of equivalent Colour Value ; with phototype of the author's 

 'tintometer', numerous coloured plates, and woodcuts, 8vo. cl., 3* Qd (p. 7* 6d) [1893] 



2708 [LOYS de CH^SEAUX (Jean Philippe)] EssAis de Physique ; with plates, l2mo. fine copy 

 in old calf gilt, ivith bookplate of Philip 2nd Earl Stanhope, F.R.S. , 5s 1743 

 CoNTKNU : Essai de Dynaniiqi'.e ; Traitc de la Force de la Poudre a Canon ; Du Mouvement de I'Air dans la Propagation dn Son. 



2709 LOZERAN du FESC (Louis Antoine, s.j.) Dissertation sur la Cause et la Nature du 

 ToNNERRE et des Eclairs, avec I'Explication des divers Phenomenes qui en dependent, 16mo. 

 boards {rare), \2s 1727 



This work received the prize of the French Academy. Bound up with it is ' Dissertation sur les Triremes ou Vaisseaux 

 de Kiifcrre des Anciens' {witlwvt t tie), pp. 71 [1721]. 



2710 LUBBOCK (Sir John William, f.r.s. ; father of Lord Avebury) On the Theory of the MooN, 

 and on the Perturbations of the Planets: On the Determination of the Distance of a 

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 Daniel Bernoulli; and Treatise on the Attraction of Ellipsoids— 3 vols. 8vo. in 1, boards, 

 uncut, 8s 6d 1833-2-1 



' His laborious researches in physical astronomy were mainly directed towards the' simplifloation of methods ; and he 

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2711 , and John Elliot Drinkwater BETHUNE: On Probability, first edition, 8vo. 



(pp. 64), seivn (scarce), 5s [1830] 



' An excellent elementary treatise ... a binder's blunder caused this work to be often attributed to De Morgan, despite 

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See CouRNOT, ante, and Morgan, post. 



