HENRY SOTHEKAN & CO., 140, STKAND, W.C., AND 43, PICCADILLY, W. 409 



8021 [FONTENELLE (Bernard le Bovier de ; F.R.S.)] FOMENTS de la GEOMETRIE de I'!NFINI ; 

 with plate, 4to. old calf gilt, newly rebacked (fine copy], 8s Qd Imprimerie Roy ale, 1727 



8022 ANOTHER COPY, hf. calf, with bookplate of Edward 12th Duke of Norfolk, 7s Qd 



8023 A WEEK'S CONVERSATION on the PLURALITY of WORLDS ; 6th Edition, translated by 



MRS. APHRA BEHN, JOHN GLANVIL, JOHN HUGHES, and WILLIAM GARDNER; with JOSEPH 

 ADDISON'S DEFENCE of the NEWTONIAN PHILOSOPHY, with 2 copperplates, 12mo. contemporary 

 calf (joints cracked), 7s Qd 1737 



Aphra Behn on the plurality of worlds ! 



8024 FONVIELLE (Wilfrid de) ECLAIRS et TONNERRE ; 2* Edition, augmented ; with 24 plates, 

 and 15 other woodcuts, cr. 8vo. sewn (o. p.), 2s 1869 



8025 THUNDER and LIGHTNING ; translated and edited by T. L. PHIPSON, F.C.S., with 24 



plates, and 15 other woodcuts, cr. 8vo. cl. gilt (o.p.), 3s 1868 



8026 HISTOIRE de la NAVIGATION AERIENNE ; with 99 illustrations, roy. 8vo. cL, g. e., 3s Qd 1910 



8027 ADVENTURES in the AIR, being Memorable Experiences of Great Aeronauts, translated and 



edited by JOHN SCOTT KELTIE, with 35 plates and woodcuts, post 8vo. cl. (o. p.), 7s Qd 1877 



802S FORBES (John, D.D.) The THEORY of the DIFFERENTIAL and INTEGRAL CALCULUS, derived 

 synthetically from an Original Principle, with diagrams, 8vo. cl. (scarce), Qs Glasgow, 1837 



Attempting to establish the calculus on purely geometrical principles. 



8029 FORDYCE (George, M.D., FR.S., St. Thomas's Hospital) ACCOUNT of a NEW PENDULUM, 

 (Bakerian Lecture), with 4 copperplates, 4to. (pp. 19), sewn, 3s 1793 



8030 On the CAUSE of the ADDITIONAL WEIGHT which METALS acquire by being CALCINED, 



with folding copperplate by Basire, 4to. (pp. 9), sewn, 4s 1792 



1 Important as confirming by an indirect method the views of Priestley and Lavoisier in opposition to the doctrine of 

 Phlogiston.' D. N. B. Dr. Fordyce was an able chemist and mineralogist, and lectured all the week all the year round 

 on chemistry and materia medica for over thirty years. 



8031 FOREST DUCHESNE (Nicolas ; s.j.) La FLEUR des Pratiques du COMPAS de PROPORTION, 

 oil sont facilities toutes les plus belles DEMONSTRATIONS des MATHEMATIQUES, reveue et 

 augmentee par 1'Auteur ; with folding plate of the Compass, numerous engravings on copper, 

 diagrams, and folding table, 12mo. hf. polished green morocco neat (title and plate slightly mended, 

 and lower part water-stained, otherwise a fine copy) ; rare, 1. Is H. Guenon, 1639 



This seems to be the first French work on the compass of proportion, invented by Galileo some 30 years before, and 

 contains a number of new applications. 



8032 FOREST ANI (Lorenzo, da Pescia, de' Minori Conventuali di S. Francesco) PRATICA 

 d'ARiTHMETiCA e GEOMETRIA, di nuovo ristampata, e con somma Diligenza ricorretta ; with 

 numerous woodcuts and diagrams, sra. 4to. boards, uncut (RARE), 17* Qd Siena, 1682 



' This work is so scarce that it has escaped Prof, de Morgan. It contains solutions of several indeterminate problems. 

 Amongst the authors quoted by Forestani we find Galigai, Calandri, Lazzisio, Pagani, etc.' Libri Catalogue. 



1 Opera interessantissima per la storia dell' aritmetica, ampiamente sviluppata ed applicata anche alia mercatanzia ; e 

 per quella della geometria pratica, trovandovisi la descrizione e 1'uso degli strurnenti allora conosciuti, fra i quale sono 

 notevoli quelli che ora direbbersi di celerimensura.' Eiccardi. 



8033 FORFAIT (Pierre Alexandre Laurent) SOLUTIO PROBLEMATIS a Regia Scientiarum et 

 Literarum ACADEMIA MANTUANA propositi, 1776 : eum Modum determinare, quo, minimo 

 labore, et minima impensa, navigabiles Alvei expediantur ex arena, et acervis, qui horum fundum 

 altius evehunt ; with Q folding copperplates, 4to. sewn, 7s Qd Mantuce, 1777 



This work obtained the prize of the Academy of Mantua as the best on the upkeep of navigable canals. 



8034 TRAITE ELEMENTAIRE de la MATURE des VAISSEAUX ; with 21 folding plates containing 



190 figures, 4to. old calf gilt, 15s 1788 



8035 ANOTHER COPY, with the Royal Arms on title defaced, contemporary calf gilt, \Qs Qd 



'Tout ce qui concerne les bois, les mats, les voilures, les vergues et les autres parties du vaisseau y est decrit avec une 

 precision remarquable '. Biogr. Gen. 



The author, who was sent to England in 1789 to study the progress of the British Navy, was president of the commis- 

 sion charged to prepare an armed descent on England in 1798. 



8036 FORNEY (Matthias N.), Leander GAREY, and Calvin A. SMITH : The CAR-BUILDER'S 

 DICTIONARY : an Illustrated Vocabulary of Terms which designate American Railroad Cars, 

 their Parts and Attachments : enlarged Edition, with the Leading Terms in English Railway 

 Carriage and Wagon Construction, by A. M. WELLINGTON, C.E., with front., and hundreds of 

 woodcuts, obi. 4to. cl., Qs New York, 1884 



8037 FORSTER (Martin Onslow, F.R.S.) CAMPHOROXIME, diagrams, 2 parts 8vo. sewn, Is Qd 1897 



8038 STUDIES in the CAMPHANE SERIES, Parts II V, VII X, and XII, 9 parts 8vo. sewn, 



3s 1901-3 



8039 FORSTER (Thomas Ignatius Maria, M.D., F.R.A.S. ; friend of Shelley and Sir William 

 Herschel) RESEARCHES about ATMOSPHERIC PHENOMENA ; 2nd Edition, enlarged, with Qfine tinted 

 plates by F. C. LEWIS, illustrating various types of clouds, 8vo. boards (scarce), Is Qd 1815 



8040 THIRD [LAST] EDITION, corrected and enlarged, with the CALENDAR of NATURE, 8vo. calf 



gilt (nice copy], \2s Qd 1823 



Still valuable as an elaboration of Howard's nomenclature of clouds (v. No. 2012, ante). 



8041 FORSYTH (Andrew Russell, F.R.S.) INVARIANTS, COVARIANTS, and QUOTIENT-DERIVATIVES 

 associated with LINEAR DIFFERENTIAL EQUATIONS, roy. 4to. (pp. 113), sewn, with inscr. to Prof. 

 Lloyd Tanner, F. E.S. , 3s Qd 1888 



8042 The DIFFERENTIAL INVARIANTS of SPACE, roy. 4to. (pp. 57), sewn, 2s Qd 1903 



8043 FOTHERINGKHAME (Thomas, master, R.N.) DIRECTIONS for ASCERTAINING and COUNTER- 

 ACTING the Effects of LOCAL ATTRACTION on the MARINER'S COMPASS, by explaining the neces- 

 sary Methods of Guarding against its Power, with Cases shewing the Necessity of attending to it, 

 and a few Practical Hints on the Variation of the Compass, and the Utility of the Lead and 

 Charts, 4to. cl., 7s Qd 1837 



