HENRY SOTHERAN & CO., 140, STRAND, W.C, AND 43, PICCADILLY, W. 675 



13496 PONTHli^BE (Honore, Univ. Louvain) Thermo-Chemical Study of the Refining of Iron, 



8vo. (pp. 16). ,seicn. Is 6rf 1897 



Prof. Ponthitres lecturerooin doubtless added some sticks to the bontire at the Kulturfest of the Emperor William the 

 Slaughterer. 



13497 PONTON (Mungo, f.r.s.e.) On Certain Laws of Chromatic Dispersion, 8vo. (pp. 41), sewn, 

 2i [1859] 



13498 Earthquakes: their History, Phenomena, and probable Causes, revised Edition, with 



Account of recent Earthouakes, 28 plates and woodcuts, cr. 8vo. cl. (o. p.), 35 1888 



This woik is not noticed iu D. N. B. The author made the discovery that the action of sunlight renders bichromate of 

 potassium insoluble. 



l.*U99 On the Law of the Wave Lengths corresponding to certain Points in the Solar 



Spectrum, 8vo. (pp. 8), vnbound. Is Qd [1860] 



13500 POOLE (Cecil Percy, m.a.i.e.e.) Diagrams of Electrical Connections, 2oith 130 diagrams 

 [indiid in g folding plates), roy, 8vo. c/., 5* (p. Hs 6rf nett) New York, 1907 



13501 POOLE (Jolm; dramatist) CROTCHETS in the Air ; or an (Un)scientitic Account of a Balloon 

 Trip, in a Familiar Letter to a Friend, 2nd Edition, 8vo. original figured cl., unth balloon in gold 

 in centre {scarce), 10s Qd 1838 



Hatton Tumor, who quotes very fully from the above work in his Astra Castra, writes ' I mucli regret that I have not 

 been able to find the name of the author of the amusing paper entitled • Crotchets in the Air '.' He might have done so, 

 had he procured a copy with the title-page. 



It includes an account of the disa.strous ascent of Mme. Blanchard, which the author witnessed while staying in Paris. 



13502 POOR (Charles Lane, Columbia Univ. ; f.r.a.s.) The FIGURE of the SuN, with the Observ- 

 ations of SCHUR and Ambronn, with 3 diagrams, 2 parts roy. 8vo. (pp. 25), sewn, with author's 

 insnr., 'ZsQd Chicago, 1905 



13503 POPE (Thomas, Architect and Landscape Gardener) Treatise on BRIDGE Architecture, in 

 which the Superior Advantages of the Flying Pendent Lever Bridge are fully proved ; with 

 Historical Account and Description of Bridges in various Parts of the World, Jrontispiece of an 

 1800 feet span timber bridge over the East uiver, New York, and vignette {both in duplicate), and 

 14 plates, 8vo. original hf. binding, uncut {back damaged)', very SCARCE, £1. 10« Netc York, 1811 



This was a wonderful idea indeed, for a quasi-cantilever bridge of timber, buildable without centring, and of apparently 

 unlimited span. The author justly claims that its 'principles, shape, construction, and extent difler wholly from all others 

 before invented ', and breaks out into much verse in the metre of his namesake, eg., 

 ' Let the Broad Arch the spacious Hudson stride, 

 And span Columbia's rivers far more wide. 

 Convince the world America begins 

 To foster Arts, the ancient work of Kings '. 

 The work contains an interesting list of subscribers, containing about 500 American names. 



13504 POPE (William Jackson; f.r.s. ; Prof. Chemistry, Cantab.) The Crystalline Forms of the 

 Sodium Salts of Substituted Anilic Acids, with 5 diagrams, Svo. (pp. 8), sewn, with authors 

 inscr.,ls6d 1892 



13505 Die Krystallformen dfer N atriums alze der SUBSTITUIRTEN Anilsauren ; die 



Krystallformen der stereoisomeren ««'— Dimethylpimelinsauren; with 8 diagrams, 8vo. 

 (pp. 8), sewn, \s Qd Leipzig, 1895 



13506 Orthobenzoicsulphinide, with 3 diagrams, 8vo. (pp. 6), seian, loith author's' inscr.. 



Is 6d 1895 



13507 , and Charles Stanley GIBSON : The Alkyl Compounds of Gold, Svo. (pp. 6), sewn. 



Is 6d 1907 



13508 , and John READ : The Optical Activity of Compounds having Simple Molecular 



Structure, 8vo. (pp. 6), sewn. Is 6d 1908 



13509 POPPE (Johann Heinrich Moritz v., Univ. Tubingen) Encyclopadie des gesammten 

 Maschinenwesens, Oder vollstiindiger Unterricht in der praktischen Mechanik und Maschinen- 

 lehre, mit Erkliirungen der dazu gehorigen Kunstwcirter in alphabetischer Ordnung, 2. fast durch- 

 gehends umgearbeitete AuHage, mit 3 Erganzungs Banden; with numerous folding plates, 

 8 thick vols. 8vo. hf. German calf gilt, 10s Leipzig, 1820-7 



Last edition of this interesting storehouse of contemporary Continental machinery practice. 



13510 Praktisches Handbuch fur Uhrmacher, Uhrenhandler, undfiir Uhrenbesitzer ; 



oder vollstandiges Lexikon und Erklarung der Begrifl'e und Kunstworter, welche bey Verfer- 

 tigung, Reparatur und Gebrauch von Uhrwerken vorkommen, neue Ausgabe ; ivith 12 folding 

 plates, 2 vols. 8vo. sevm, Is fid ibidem, 1810 



13511 POPULAR ASTRONOMY : a Review of Astronomy and allied Sciences, edited by William 

 W. Payne, Charlotte R. Willard, Herbert C. Wilson, etc., from the Beginning in 1893/4 

 to 1898 (Vols. I — VI), tt^ih portraits, numerous plates, coloured maps of constellations, and 

 numerous other illustrations, 6 vols. roy. 8vo. hf. roan, £1. 15s (p. £3. .35 nett sewn) 



Northfield, Minn., 1894-8 



13512 PORRO (Ignazio) Nouveau MiCROMiiTRE ji Lignes Lumineuses Reflechies pour les 

 Instruments d'AsTRONOMiE ; a lithographed MS. on 12 pp., unth illustration, 4to. (pp. 12), sewn, 

 Ss [1858] 



13513 PORTA (Giovanni Battista della ; Napoletano) De Aeris Transmutationibus Libri IV, 

 in quo Opere diligenter pertractatur de iis, quae, vel ex Aere, vel in Aereoriuntur : MerewpoXoywr 

 multiplices Opiniones, qua illustrantur, qua refelluntur. Demum variarum Causae Mutationum 

 aperiuntur, editio princeps; with arms on title, woodcuts, diagrams, and folding table, sm. 4to. 

 contemporary limp vellum, with Cardinal's arms in centre (RARE), £1. 5* Romce, B. Zannettus, 1610 



' Une meteorologie aussi complete qu'il etait possible de la former alors par de simples observations sans aucun instru- 

 ment de mesure. ... 11 faut mentionner sp^cialement ce qu'il dit sur les marees, dont il s'etait occupe k Venise : ce sont 

 probablement les pins anciennes observations de ce genre qui soient arrivees jusqu'a nous. On doit remarquer une 

 table synopti que des trunsmvtations de I'air, qui . . . d^cele dans I'auteur une faculty 6minente de classification.'-— Ltbr?. 



