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



13496 PONTHIERE (Honore, Univ. Louvain) THERMO-CHEMICAL STUDY of the REFINING of IRON, 

 Svo. (pp. 16). sewn, Is 6d 1897 



Prof. Ponthiere's lectureroom doubtless added some sticks to the bonfire 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, 

 2? [1859] 



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



Account of recent Earthquakes, 28 plates and woodcuts, cr. Svo. cl. (o. p.), 3s 1888 



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

 potassium insoluble. 



13499 On the LAW of the WAVE LENGTHS corresponding to certain Points in the SOLAR 



SPECTRUM, Svo. (pp. 8), unbound, Is 6d [1860] 



13500 POOLE (Cecil .Percy, M.A.I.E.E.) DIAGRAMS of ELECTRICAL CONNECTIONS, with 130 diagrams 

 (including folding plates), roy. Svo. cl., bs (p. 8* 1 Qd nett) New York, 1907 



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

 Trip, in a Familiar Letter to a Friend, 2nd Edition, Svo. original figured cl., with balloon in gold 

 in centre (scarce), 10s 6d 1838 



Hatton Turnor, who quotes very fully from the above work in his Astra Castra, writes ' I much 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 disastrous ascent of Mine. 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. Svo. (pp. 25), sewn, with author's 

 inscr., 2s Qd Chicago, 1905 



13503 POPE (Thomas, Architect and Landscape Gardener) TREATISE on BRIDGE ARCHITECTURE, in 

 which the SUPERIOR AD VANTAGES of the FLYING PENDENT LEVER BRIDGE are fully proved ; with 

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

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

 14 plates, Svo. original hf. binding, uncut (back damaged)', VERY SCARCE, 1. 10* New 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 differ wholly from all others 

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

 ' 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 b diagrams, Svo. (pp. 8), sewn, with author .s 

 inscr.,lsQd 1892 



13505 Die KRYSTALLFORMEN der NATRIUMS ALZE der SUBSTITUIRTEN ANILSAUREN ; die 



KRYSTALLFORMEN der STEREOISOMEREN a a' DIMETHYLPIMELINSAUREN; with 8 diagrams, Svo. 

 (pp. 8), sewn, Is Qd Leipzig, 1S95 



13506 ORTHOBENZOICSULPHINIDE, with 3 diagrams, Svo. (pp. 6), sewn, with author's infer., 



Is Qd 1895 



13507 , and Charles Stanley GIBSON : The ALKYL COMPOUNDS of GOLD, Svo. (pp. 6), sewn, 



Is Qd 1907 



13508 , and John BEAD: The OPTICAL ACTIVITY of COMPOUNDS having Simple Molecular 



Structure, Svo. (pp. 6), seivn, Is 6d 1908 



13509 POPPE (Johann Heinrich Moritz v., Univ. Tubingen) ENCYCLOPADIE des GESAMMTEN 

 MASCHINENWESENS, oder vollstandiger Unterricht in der praktischen Mechanik und Maschinen- 

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

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

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



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



13510 PRAKTISCHES HANDBUCH fur UHRMACHER, UHREN HANDLER, und fur UHRENBESITZER ; 



oder vollstandiges Lexikon und Erklarung der Begriffe und Kunstworter, welche bey Verfer- 

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

 plates, 2 vols. Svo. sewn, Is 6rf 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), with portraits, numerous plates, coloured maps of constellations, and 

 numerous other illustrations, 6 vols. roy. Svo. hf. roan, 1. 15s (p. 3. 3s nett sewn) 



North field, Minn., 1894-8 



13512 PORRO (Ignazio) NOUVEAU MICROMETRE a LIGNES LUMINEUSES RKFLECHIES pour les 

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

 3s [1858] 



13513 PORT A (Giovanni Bat tista della ; Napoletano) De AERIS TRANSMUTATIONIBUS Libri IV, 

 in quo Opere diligenter pertractatur de iis, quae, vel ex Acre, vel in Aereoriuntur : MsrswpoXoywi/ 

 multiplices Opiniones, qua illustrantur, qua refelluntur. Demum variarum Causse 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. 5s Romce, B. Zannettus, 1610 



' Une me'teorologie aussi complete qu'il etait possible de la former alors par de simples observations sans aucuu instru- 

 ment de mesure. ... II faut mentionner specialement ce qu'il dit sur les marees, dont il s'etait oceupe a Venise : ce sont 

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

 table synoptique des transmutations de I'air, qui ... de"cele dans 1'auteur une faculte eminente de classification.' Libri. 



