532 HENRY SOTHERAN & CO., 140, STRAND, W.C, and 43, PICCADILLY, W. 



10693 LEGROS (Adolphe) Photographie sur Collodion, 8vo. (pp. 63), sewn [scarce), 6s 



chez Vauteur [1852] 

 An early work on the collodion process, invented by Scott Archer and Le Gray {q. v. ante) before 1850. 



10691 LEHMANN (Carl Gotthelf ) Physiological Chemistry, translated from the 2nd Edition by 

 George E. Day, f.r.s., 3 vols. 8vo. cl. : Atlas of Physiological Chemistry, by Otto Funke 

 (Supplement), 15 plates, 4to.— 4 vols., 8s 6d Cavendish Soc, 1851-4 



The author made important original investigations on the nature of the albumens and the ferments of digestion. 



10692 LEHMANN (Otto, Karlsruhe) Die elektrischen Lichterscheinungen, oder Entla- 

 dungen begeichnet als Glimmen, Bilschel, Funken und Lichtbogen, in freier Luft und in 

 Vacuumrohren, unter Beriicksichtigung von Entladungen ohne Lichterscheinung und der 

 Entstehung des Lichtes, der elektrischen Strahlen, Kathodenstrahlen, Rontgenstrahlen etc., zum 

 Theil auf Grund eigener Experimentaluntersuchungen bearbeitet; with 10 coloured plates, 

 and 370 other illustrations, large 8vo. hoards, 12s (p. M. 20) Halle a. S., 1898 



10693 LEHMUS (Daniel Christian Ludolph) Kurzer Leitfaden fiir den Vortrag der hohern 

 Analysis, hohern Geometrie und analytischen Mechanik ; with plate : Drei Hundert 

 Aufgaben aus der hohern und angewandten Mathematik, with plate: Aufgeloste 

 Aufgaben aus der niedern, hohern und angewandten Mathematik, with S plates— S vols. 

 8vo. in 1, brown calf extra [nice copy), 5s 6d Berlin, \M2— Leipzig, '38 



10694 LE HON (Henri) L' Homme Fossile en Europe [et I'Influence des Lois Cosmiques sur la 

 Climatologie et la Geologie] ; 4® Edition, avec Notice bibliographique et Notes paldontologiques 

 et archdologiq[ues, par E. Dupont ; with coloured front., and 100 woodcuts, 8vo. hf. calf, 5s 1877 



The Piltdown skull has now (1912) put back paheolithic man to a far earlier dawn of human consciousness than was 

 ventured on in 1877. 



10695 LEIBNIZ (Gottfried Wilhelm Freiherr v. ; f.r.s.) Opera Omnia, nunc priraum collecta, in 

 Classes distributa, Prtefationibus et Indicibns exornata, studio LUDOVICI DUTENS ; loith fine 

 portrait by P. Savart, and illustrations y 6 thick vols. 4to. sound copy in contemporary calf (rare), 

 £3. 135 6c? Genevce, 1768 



' Collection trfes-recherch^e,'— Brunei. It contains the '61oge ' by Fontenelle, and a life by Jacob Brucker. 



10696 Nova Methodus pro Maximis et Minimis itemque Tangentibus, qure nee Fractas nee 



Irrationales Quantitates moratur, et singulare pro iliis Calculi Genus [mit Einleitung und Anmer- 

 kungen (pp. 35) von F. Giesel] ; with plate, 4to. sewn. As Leipzig, 1884 



The well-known paper, originally published in the Acta Enulitorum in 1684, on which Leibniz based his claim to the 

 invention of the calculus. 



10697 Nouvelles Lettres et Opuscules In^dits, precedes d'une Introduction par A. Foucher 



de Careil, 8vo. hf. mottled calf (joints broken), with bookplate of Henry Reeve, C.B., editor of the 

 Greville Memoirs, As 8d 1857 



10693 Opuscules et Fragments In^dits : Extraits des Manuscrits de la Bibliotheque 



Royale de Hanovre, par Louis Couturat ; with numerous diagrams, 4to. hf. broivn morocco gilt, 

 cl. sides, uncut, t. e. g., with bookplate of Dr. Emil Reich, lis 6rf 1903 



Containing inuch of mathematical interest. 



10699 : Virorum celeberrimorum G. GuL. Leibnitii et JOH. Bernoullii Commercium 



Philosophicum et Mathematicum, 1694-1716: with numerous plates, 2 vols. 4to. boards, uncut, 

 \5s Lausannce, 1745 



10700 Another Copy, with fine portrait of Leibniz by Ficquet, 2 vols. 4to. contemporary calf 



extra [one Joint cracked, otherwise a fine copy), £1. 2* 6c? 



Important for containing the evid'^nce, as embodied in the correspondence between Leibniz and Jean Bernoulli, on the 

 question of the rival claims to priority of the invention of the calculus between Newton and Leibniz. It was the only 

 serious claim published in Leibniz's favour, and a tardy reply to the Commercium EpUtolicum {v. No. 3282 ante), which 

 gave the evidence in Newton's favour. 



However little the merits of Leibniz's claim may be as to its origination, there can be no doubt as to the superiority 

 of his notation to Newton's fluxional one, which being stubbornly adhered to at the English universities, prevented 

 this country from having any important share in the progress of the calculus for more than a century after. 



10701 Correspondance avec Oldenburg, Collins, Newton, Galloys, et Vitale 



Giordano, publi^e par C. J. Gerhardt ; with ^plates {2 folding), 8vo. sewn, As 1853 



10702 : Hansch (Michael Gottlieb) G. G. Leibnitii P'rincipia Philosophic, More 



Geometrico demonstrata : cum Excerptis ex Epistolis Philosophi et Scholiis quibusdam ex 

 Historia Philosophica, cum Indicibus ; accedunt Theoremata Metaphysica de Proprietatibus 

 quisbusdam Entis Infiniti et Finiti Mundique existentis Perfectione ex Philosophia Leibnitiana 

 selecta tt geometrice demonstrata, etc. etc., 4to. contemporary vellum, 8s Qd Francofurti, 1728 



10703 : Recueil de Diverses Pieces sur la Philosophie, la Religion Naturelle, I'Histoire, les 



Mathematiques, etc. par Mrs. Leibnitz, Clarke, Newton, etc. [public par Pierre des 

 Maizeaux ; F.R.S.]; with portrait of Charlotte, Queen of George II., ajttr Kneller, 2 vols. 16mo. 

 in 1, old hf. calf gilt, \2s Qd Amsterdam, 1720 



Containing the correspondence of Leibniz and A. S. Conti, f.r.s., on the dispute regarding the invention of the 

 calculus, also Newton's remarks, and Leibniz's letter to him. 



10704 LEJEUNE-DIRICHLET (Peter Gustav; Gottingen) Recherches sur la Theorie des 

 Nombres Complexes, Traduction de Herv6 Faye, 4to. (pp. 25), seivn, 2s 1844 



10705 Vorlesungen iiber Zahlentheorie, herausgegeben v. R. Dedekind, erste Auflage, 



8vo. hf. calf gilt {nice copy), 5s Braunschweig, 1863 



' Of his original researches the most celebrated are that on the establishment of Fourier's Theorem, and that in the theory 

 of numbers on asymptotic laws, i.e. laws which approximate more closely to accuracy as the numbers concerned become 

 larger.'— H^. W.R.Bali. 



10706 LEMNITJS [sive LEMMENS] (Lieven [Latine Levinus]) De Miraculis Occultis 

 Nature Libri IIII, item, de Vita cum Animi et Corporis Incolumltate recte instituenda, Liber 

 unus : illi quidem iam postreinum emendati, et aliquot Capitibus aucti ; his vero nunquam 

 antehac editus, thick 24nio. old vellum, 105 Qd Francofurti, 1628 



