130 HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 1 



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) are 

 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, plates and diagrams, folio, sound and tall copy in old calf gilt, 

 with auto. 'TYCHO WlNG, 1729' [astrologer] on title, 15* 1694 



Including besides mathematical subjects, astronomical, physical, magnetical, 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 man of considerable ingenuity and uncommon industry.' D. N. L'. 



des 

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gilt (Jine copy), wit/i ooo/cptate oj ffiilip Vnd Mart Stanhope, F.M.S., is Urt 1716 



2599 - NOUVELLE EDITION, avec NOUVEAU COMMENTAIRE pour 1'Intelligence 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 Europe.' W. W. 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 posthume, premiere 

 edition ; with numerous plates, 4to. old calf gilt, with Lord Suffield's bookplate, 6s 1707 



2601 NOUVELLE EDITION; with plates, 4to. old calf, with auto, of Prof. A. W. Williamson, 



F.E.S., 5s 1720 



2602 ANOTHER COPY, old calf gilt (fine copy], with Lord Stanhope's bookplate, Qs Qd 



2603 An ANALYTICK TREATISE of CONICK SECTIONS, and their Use for Resolving of Equa- 

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



2604 L'HTJILIER (Simon Antoine Jean; F.RS.) EXPOSITION ELEMENTAIRE des PRINCIPES des 

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



2605 POLYGONOMETRIE, ou de la MESURE des FIGURES RECTILIGNES ; et Abrege d'LsopERi- 



MISTRIE ELEMENTAIRE, on de la De'pendance Mutuelle des Grandeurs et des Limites des Figures ; 

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2606 ANOTHER COPY, nice copy in old calf gilt, 5s 



2607 LIAGRE (Lt.-Gen. Jean Baptiste Joseph) CALCUL des PROBABILITIES et THEORIE des 

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 culier, 2 e [derniere] Ed. par CAMILLE PENY; with diagrams, thick sq. 8vo. boards (SCARCE), 

 185 Qd Bruxelles, 1879 



Especially valuable for applyirg the calculus of probability to geodetic problems. 



2608 - Sur les CORRECTIONS de la LUNETTE MERIDIENNE, 4to. (pp. 71), cl., 2s Qd [ibidem, 1845] 



2609 LIBRI [-CARRTJCCI] (GuiUaume Brutus Icilius Timoleon Comte ; biblioklept) HISTOIRE 

 des SCIENCES MATHEMATIQUES en ITALIE, depuis la Renaissance des Lettres jusqu'a la Fin du 

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' Cet ouvrage est remarquable par de consciencieuses recherches cf erudition et par un style aussi clair qu'elegant.' 

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 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), Qs Firenze, 1820 



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



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

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Including Meteorological Observations at Mount Hamilton, Sept. 1SSO Nov. '85, by THOMAS E. FRASER (pp. 86), 

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2612 : REPORTS on the OBSERVATIONS of the TOTAL ECLIPSE of the SUN, Dec. 21-22, 1889 

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2613 LIEBIG (Justus Freiherr v.) CHEMISCHE BRIEFE, 1. Auflage, post Svo. cl., 4s Heidelberg, 1844 

 2014 SECHSTE [LETZTE] AUFLAGE, 8vo. hf. morocco, 3s Qd 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.], 

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2616 - FOURTH EDITION, revised and enlarged by JOHN BLYTH, M.D., post Svo. hf. calf, 4s Qd 1859 



2617 CHEMISTRY in its APPLICATIONS to AGRICULTURE and PHYSIOLOGY, ed. by LYON PLAY- 

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261S THIRD EDITION, revised and enlarged, Svo. cl., 4s 1843 



2Q19 Ueber GAHRUNG, QUELLE der MUSKELKRAFT und ERNAHRUNG, 8vo. sewn, 2s 



Heidelberg, 1870 

 2620 Die GRUNDSATZE der AGRIKULTURCHEMIE, mit Riicksicht auf die in England angestellten 



Untersuchungen, 2. Auflage, mit Nachtrag, Svo. sewn, 2s Braunschweig, 1855 



2621 - The NATURAL LAWS of HUSBANDRY, ed. by JOHN BLYTH, M.D., Svo. cl., 3s 1863 



2(j22 Ueber THEORIE und PRAXIS in der LANDWIRTHSCHAFT, 8vo. sewn, 2s Braunschweig, 1856 



2623 Die THIER-CHEMIE, oder die organische Chemie in ilirer Anwendung auf Physiologic 



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