130 HENRY SOTHERAN & CO., 140, STRAND, AV.C, and 37, PICCADILLY, \Y. 



2597 LEYBOURN (William) Pleasure with Profit : consisting of Recreations of Divers Kinds, 

 published to Recreate Ingenious Spirits and to induce them to make farther scrutiny into these 

 Sublime Sciences, and to divert them from following such Vices, to which Youth (in this Age) arc 

 so much Inclin'd, with a Treatise of Algebra, according to the late Improvements, with a 

 New Series for the speedy Extraction of Roots, and a Converging Series for all manner of Adfected 

 Equations, by Richard Sault, ;?Za/e5 and diagrams, folio, sound and tall copy in old calf gilt, 

 withaido. ' Tycho Wing, \12Q' [astrologer^ on title, 15* " 1694 



Including besides mathematical subjects, astronomical, physical, niagnetical, and chemical ones. 



'Leybourn's works all grew out of his teaching, and were deservedly popular. They are clear and attractive in style, 

 and are the work of a nian of considerable ingenuity and uncommon industry.'— Z). N. B. 



259S L'HOSPITAL (Guillaume Fran9ois Antoine, Marquis de St.-Mesme) Analyse des 

 Infiniment Petits, pour rintelligence des Lignes Courbes, 2^ Ed. ; with numerous plates, 4to. 

 old calf gilt [fine copy), with bookplate of Philip 2nd Earl Stanhope, F.R.S., Is Gd 1716 



2599 NouvELLE Edition, avec Nouveau Commentaire pour rintelligence des Endroits les 



plus difficiles [par A. H. Paulian] ; 8 plates, 8vo. hf calf {back damaged), 4s Qd Avignon, 1768 



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

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

 make it known in Euroi>e.'— IF. IF. R. Ball. 



2600 . Traite Analytique des Sections Coniques et de leur Usage pour la Resolution des 



Equations ; dans les Problemes tant determinez qu' inddterminez ; Ouvrage jmsthume, premiere 

 edition; with numerous plates, 4to. old calf gilt, with Lord Suffield's bookplate, Qs 1707 



2601 Nouvelle Edition ; with plates, 4to. old calf, unth auto, of Prof. A. W. Williamson, 



F.E.S., 5s 1720 



2602 Another Copy, old calf gilt {fine copy), with Lord Stanhope's bookplate, 6s 6d 



2603 An Analytick Treatise of Conick Sections, and their Use for Resolving of Equa- 

 tions in Determinate and Indeterminate Problems, plates, 4to. boards {broken), 5s 1723 



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



2604 L'HTJILIER (Simon Antoine Jean; f.rs.) Exposition Elementaire des Principes des 

 Calculs Superieurs; u'ith plate, 4to. sewn {wanting 1 plate), Zs 6d Berlin [1787] 



This work received the prize of the Berlin Academy of Science. 



2605 Polygonometrie, ou de la Mesure des Figures Rectilignes ; et Abrege d'lsoPERi- 



METRIE Elementaire, on de la D^pendance Mutuelle des Grandeurs et des Limites des Figures ; 

 with 2 plates, 4to. boards, 4s Geneve, 1789 



2606 Another Copy, nice copy m old calf gilt, 5s 



2607 LIAGRE (Lt.-Gen. Jean Baptiste Joseph) Calcul des Probabilites et Th^orie des 

 Erreurs, avec Applications aux Sciences d'Observation en general et a la Geodesie en parti- 

 culier, 2^ [derniere] Ed. par Camille Peny; with diagrams, thick sq. 8vo. boards (scarce), 

 18s 6d Bruxelles, 1879 



Especially valuable for api)]yii g the calculus of probability to geodetic problems. 



2608 Sur les Corrections de la Lunette Meridienne, 4to. (pp. 71), cl., 2s 6d [ibidem, 1845] 



2609 LIBE.I [-CARRUCOI] (Guillaume Brutus Icilius Timoleon Comte ; biblioklept) Histoire 

 des Sciences Mathematiques en Italie, depuis la Renaissance des Lettres jusqu'a la Fin du 

 XVIIe Siecle; loith diagrams, 4 vols. 8vo. hf. French calf gilt (SCARCE), £1. \s 1838-41 



' Get ouvrage est rcmarquable par de consciencieuses recherches d erudition et par un style aussi clair qu'elegant.' — 

 Biogr. Gen. It still remains an authority on the subject, and it was very sad that Gulielmus Brutus Icilius Timoleon 

 should ever have lapsed from the stern virtue of a student of the exact sciences. 



2610 Memoria sopra la Teoria dei Numeri, 4to (pp. 24), sewn {scarce), 6s Firenze, 1820 



The author's first published work, written at the age of 17, which at once established his reputation as a mathematician. 



2611 LICK OBSERVATORY, Publications of the, of the University of California, prepared by 

 Edward S. Holden, Vol. I, ivith front, and numerous full-page and other woodcuts of Astro- 

 nomical and Meteorological Instruments, 4to. cl., 6s 6d (p. 12* nett) Sacramento, 1887 



Including Meteorological Observations at Mount Hamilton, Sept. ISSO— Nov. 'S5, by Thomas E. Eraser (pp. 8(5), 

 Reduction Tables for the Observatory by 0. C. Comstock (pp. 130), etc. 



2612 : Reports on the Observations of the Total Eclipse of the Sun, Dec. 21-22, 1889 



[at Cayenne], and of the Total Eclipse of the Moon, July 22, 1888, with Catalogue of the 

 Library [ed. by Edward S. Holden], u-ith 11 plates {including fine silver prints of eclipses 

 by Burnham, Schaeherle, etc.), 8vo. cl. {out of print), 5s ibidem, 1891 



2613 LIEBIG (Justus Freiherr v.) Chemische Briefe, 1. Auflage, post 8vo. cl , 4s Heidelberg, 1844 



2614 Sechste [letzte] Auflage, 8vo. hf. morocco, 3s 6d ibidem, 1878 



2615 Familiar Letters on Chemistry, in its Relations to Physiology, Dietetics, Agriculture, 



Commerce, and Political Economy, third Ed., much enlarged [by William Gregory, m.d.], 

 thick fcap. 8vo. cl., 3s " 1851 



2616 Fourth Edition, revised and enlarged by John Blyth, m.d., post 8vo. hf. calf, 4s 6d 1859 



2617 Chemistry in its Applications to Agriculture and Physiology, ed. by Lyon Play- 

 fair [Lord Playfair], f.r.s., 2nd Ed., with numerous Additions, 8vo. cl, 3s 1842 



2618 Third Edition, revised and enlarged, 8vo. cl., 4s 1843 



2619 Ueber Gahrung, Quelle der IvIuskelkraft und Ernahrung, 8vo. sewn, 2s 



Heidelberg, 1870 



2620 Die Grundsatze der Agrikulturchemie, mit RUcksicht auf die in England anges'tellten 



Untersuchungen, 2. Auflage, mit Nachtrag, 8vo. sewn, 2s Braunschweig, 1855 



2621 The Natural Laws of Husbandry, ed. by John Blyth, m.d., 8vo. cl., 3s 1863 



2622 Ueber TiiEORiE und Praxis in der Landwirthschaft, 8vo. sewn, 2s Bratmschiceig, 1856 



2623 Die Thier-Chemie, oder die organische Chemie in ihrer Anwendung auf Physiologic 



und Pathologie, 2. Auflage, 8vo. setvn, 2s ibidem, 1843 



