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



1376 FORSYTH (Andrew Russell, F.R.S.) THEORY of DIFFERENTIAL EQUATIONS, 3 parts in 

 4 vols. 8vo. cl., 1. 16* Qd (p. 2. 2* Qd nett) Univ. Press, Cambridge, 1890-1902 



The standard work on the subject. 



1377 TREATISE on DIFFERENTIAL EQUATIONS, large 8vo. cl., Is (p. 14*) 1885 



1378 FOSTER (Sir Clement Le Neve, F.R.S.) The ELEMENTS of MINING and QUARRYING, with 

 nearly 300 fu 1 1 -page and other illustrations, large cr. 8vo. cl., 5s (p. Is Qd nett) 1903 



1379 FOSTER (Samuel, Gresham-Colledg) POSTHUMA FOSTERI : the DESCRIPTION of a RULER, upon 

 which is INSCRIBED DIVERS SCALES : and the USES thereof : by which the most usual Propositions 

 in Astronomic, Navigation, and DIALLING, are facily performed. Also, a further use of the said 

 Scales in deliniating of far declining Dials; etc. etc. [ed. by EDMUND WINGATE], with woodcuts 

 and numerous diagrams, sm. 4to. sewn (partly water-stained) ; rare, 15s R. and W. Lei/bourn, 1652 



1330 FOUCAULT (Theophile), APPAREIL de, pour la FABRICATION du GAZ riche, Gaz mixte et 

 Gaz pauvre, remplacant economiquement les Usiries particulieres a Gaz de Houille ; with 2 plates, 

 Svo. sewn, Is Qd s. d. 



1381 BOUCHER (Abbe Paul) GEOMETRIE METAPHYSIQUE, on Essai d' Analyse sur les ELEMENS de 

 1'ETENDUE BORNEE ; with numerous foldinq plates, Svo. contemporary French mottled calf extra 

 (rare), 12s Qd 1758 



1 Get ouvrage donna lieu a des discussions assez vives, parce que 1'auteur y combat tin certain nombre de propositions 

 adoptees par tous les geometres ; mais il partait en geometric d'un faux principe, car il admettait que le calcul infinitesimal 

 suppose riecessairement 1'existence d'elements physiques infiniment petits.' Biogr. Gen. 



1382 FOULLON (Abel ; italice FULLONE ; Valet de chambre de Henri II) DESCRITTIONE et Uso dell' 

 HOLOMETRO, per saper misurare tutte le cose, che si possono veder, coll' occhio cosiin Lunghezza, 

 e Larghezza ; come in Altezza, e Profondita ; with numerous engravings on copper, 4to. sewn 

 (RARE), 1. Is Venetia, 1564 



The author is chiefly known for his invention of the ' holometer ', an improved surveying instrument, of which the 

 above work contains minute descriptions and illustrations. 



1383 FOURCRO ? (Antoine Franqois Comte de) PHILOSOPHIE CHIMIQUE, ou VERITES FONDA- 

 MENTALES de la CHIMIE MODERNE, disposees dans un nouvel Ordre, premiere edition, 12mo. 

 hf. cl., uncut (RARE), 17s Qd 



1384 SECONDE EDITION [revue etcorrigee], Svo. boards, uncut (rare), IQsQd An III [1795] 



This edition is printed in a larger type and on a superior paper, and is SIGNED BY THE AUTHOR. 



1385 TROISIEME [DERNIERE] EDITION, Svo. sewn, uncut (rare), 10s Qd 



The above are sound and uncut copies of all the editions published of this important work, setting forth the antiphlogistic 

 doctrine of the author, who conjointly with Lavoisier and Berthollet was the originator of chemical nomenclature. 



1386 The PHILOSOPHY of CHEMISTRY, or Fundamental Truths of Modern Chemical Science, 



arranged in a New Order, trans, from the 2nd Ed., Svo. boards, uncut, 8s Qd 1795 



The English translation of the above work. 



1387 ELEMENTS of NATURAL HISTORY and CHEMISTRY, trans, from the 3rd Ed. (1789), with 



Alphabetical Comparative View of the Ancient and Modern Names of Chemical Substances, and 

 Preface by the Translator [WILLIAM NICHOLSON], containing Strictures on the History and 

 present State of Chemistry, OBSERVATIONS on the ANTIPHLOGISTIC THEORY and the NEW 

 NOMENCLATURE, etc. etc., tables, 3 vols. roy. Svo. old hf. calf, uncut (rare), 12s Qd 1790 



' Le plus grand monument eleve a la science de la chlmie au XVIII e siecle.' Biog : Gen. 



1388 FOURIER (Jean Baptiste Joseph, Baron de) THEORIE ANALYTIQUE de la CHALEUR, 

 edition originate ; with 9. plates, 4to. new hf. brown calf gilt (a number of margins water- 

 stained) ; VERY SCARCE, 1. 8* Didot, 1822 



The author's most important work, containing the celebrated theorem named after him, here applied to solve the 

 transmission of heat. 



' In this work he shows that any function of a variable, whether continuous or discontinuous, nan be expanded in a 

 series of sines of multiples of the variable ; a resr.lt which is constantly used in modern analysis.' W. W. R. Ball. 



1389 FOWLER (Sir John, joint-engineer of the Forth Bridge), LIFE OF, by THOMAS MACKAY, with 

 photogravure portrait , and IS illustrations from photographs, Svo. cl., t. e. g., 4s 60? (p. 18s) 1900 



1390 FOWNES (George, F.R.S.) CHEMISTRY, as exemplifying the Wisdom and Beneficence of God, 

 woodcuts, Svo. cl. (back damaged), 2s Qd 



1391 MANUAL of ELEMENTARY CHEMISTRY, llth Ed., revised and corrected by HENRY WATTS, 

 F.R.S., coloured front., and 164 diagrams and woodcuts, thick large post Svo. cl. (out of print), 

 5s 



' A capital general text-book of chemistry.' D. N. B. The author was the discoverer of benzoliue, and the first to 

 produce artificially a vegetable alkaloid (furfurine). 



1392 FOXWELL (Ernest), and T. C. FARRER: EXPRESS TRAINS: English and Foreiga, with 

 maps (2 folding ones in pockets), Svo. cl., 3s (p. Qs) 



The average speed of crack expresses has been increased by ten miles an hour since this interesting book was written. 



1393 FRACTIONS, VULGAR and DECIMAL, 4to. <pp. 28), sewn, 5s 



Unknown to Prof, de Morgan. 



1394 FRANCCEUR (Louis Benjamin) TRAITE de MECANIQUE ELEMENTAIRE, redige d apres les 

 Methodes de R. PRONY, premiere edition ; with 8 plates, Svo. calf, 3s An IX [18 



1395 COMPLETE COURSE of PURE MATHEMATICS, trans, by R. BLAKELOCK, plates, 2 vols. Svo. 



hf. calf (back damaged), 3s Cambridge, 1829-30 



1396 - - VOLLSTANDIGERLEHRKURS der REINEN MATHEMATIK, iibersetzt von E. KtiLP, 2 te Ausgabe ; 

 with plates, 2 vols. Svo. in 4, cl., with Prof. Williamson's auto. (Giessen 1845), 3s Qd 



1397 FRANKLAND (Sir Edward, F.R.S.) EXPERIMENTAL RESEARCHES in PURE, APPLIED, and PHY- 

 SICAL CHEMISTRY, with 2 plates, 3charts, and woodcuts, Svo (pp. 1091), cl., 15s (p. 1. Us bet) lb/7 



Including all the author's memoirs contributed to the Philosophical Tmm actions, and containing his investigations 

 ' alcohol-radicles', his introduction of the doctrine of valency into chemistry, his investigations on combustion, wate 

 analysis, etc. etc. 



