HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 679 



13553 POSTLETHWAITE (John, F.G.S.), and John George GOODCHILD, F.G.S. : On some 

 TRILOBITES from the SKIDD AW SLATES, with 4 plates, 8vo. (pp. 15), sewn, \s Gd [1886] 



THE NUMBER OF THE BEAST : 



13554 POTTER (Francis, pr., F.R.S.) INTERPRETATIO NUMERI 666, qua, turn Modus unicus, quo 

 Numerus hie interpretandus est, perspicue probatur et dernonstratur ; turn ostenditur, Numerum 

 hunc perfectum esse et accuratum Characterem, quo vere exacte et essentialiter, describitur 

 Status ille et Regimen, cui reliquse omnes ANTICHRISTI Notae conveniunt ; with engraved 

 symbolic title, 12mo. old calf, 8s Gd Amstelodanii, 1677 



; ' A wild but ingenious theory of the Number of the Beast, connecting 25, the ' appropinque ' square root of 666, with 



various Romish institutions. Pepys, who read the work in November 1666, consideied it ' mighty ingenious '.' D. N. B. 



Joseph Mead, the Biblical scholar (1586-1638), in a commendatory note appended to the work, declares it to be 



'omnium felicissimus qui in mundum hactenus prodierunt: uec legi potest (nisi ab eis qui nolunt credere) sine summa 



admiratione '. 



13555 POTTER (Richard, Prof. Astronomy, Univ. Coll., Lond.) ELEMENTARY TREATISE on 

 MECHANICS, with diagrams, 8vo. cl., 2s 1846 



1355g ELEMENTARY TREATISE on OPTICS, with the Construction of Optical Instruments, with 



woodcuts, 8vo. cl., 3s 1847 



13557 PHYSICAL OPTICS, or the Nature and Properties of Light, with 1G1 woodcuts, 8vo. cl., 



3s 1856 



13558 POTTER (Thomas ; Clerk of Works to Lord Ashburton) CONCRETE : its Use in Building, and 

 the Construction of Concrete Walls, Floors, etc. ; New Edition, rewritten, with numerous wood- 

 cuts, 2 vols.post8vo.ini, cl., 5s , . Winchester [1S91} 



13559 The CONSTRUCTION of SILOS, and the Compression of Green Crops for Silage, with 62 



woodcuts, sq. post 8vo. cl., with author's inscr., 3s Gd [1886] 



English farmers owed their introduction to ensilage to a succession of wet summers in the 'Eighties. 



13560 POTTER (W. J.) CONCURRENT PRACTICAL and THEORETICAL GEOMETRY, containing the 

 Substance of Euclid I XI, treated both experimentally and formally, with diagrams, Parts 

 I III in 1 vol. thick cr. 8vo. cl., 2s Gd 1910 



13561 POUILLET (Claude Servais Mathias ; de I'lnstitut), et V. LE BLANC: PORTEFEUILLE 

 INDUSTRIEL du CONSERVATOIRE des ARTS et METIERS, on Atlas et Description des Machines, 

 Appareils, Instrumens, et Outils employes en Agriculture et dans les differens Genres d'Industrie, 

 IER VOL. (seul paru), roy. 8vo. hf. morocco gilt (atlas missing), 4s 1834 



13562 POTJSSIN (Major Guillaume Tell, U.S. Army) CHEMINS de FER AMERICAINS : Historique 

 de leur Construction, Prix de Revient et Produit, Mode d' Administration adopte, Resume de la 

 Legislation que les regit ; with folding map and! plates of permanent way, 4to. hf. calf, with auto, 

 of George Rennie, C.E., F.R.S. (SCARCE), 1. Is 1836 



Very interesting as probably the firstgiving details and statistics of the Railways of the United States. The map showa 

 the very extensive system already open or under construction. 



The author, according to Allibone, 'soon after the downfall of Napoleon I., accompanied General Bernard to the 

 United States, and assisted him there in the construction of military works, and became a naturalized citizen.' 



13563 POWALKY (Carl Rudolf) NEUE UNTERSUCHUNG des VENUSDURCHGANGES von 1769 zur 

 Bestimmung der Sonnenparallaxe, 4to. (pp. 28), sewn, 2s Gd Kiel, 1864 



' Powalky in 1864 discussed 44 observations, made at nineteen stations.' R. A. Proctor. 



13564 POWELL (Baden, pr., Oriel Coll.-, F.R.S., Savilian Prof. Geometry; 'Essayist and Reviewer;' 

 father of Lt.-Gen. Sir R. S. S. Baden-Powell ['B.P.']) On the ACHROMATISM of the EYE, 8vo. (pp. 

 32), sewn, 2s Gd Ashmolean Soc., Oxford, 1834 



1356,* ANOTHER COPY, with 1-page Pamphlet : On the Achromatism of the Eye, in Reply to 



some Remarks in the 'Philosophical Magazine ', 8vo. sewn, with author's inscr., and auto, of Dr. 

 P. M. Roget, F.R.S., 3s Gd 1834-5 



13566 ELEMENTARY TREATISE on the GEOMETRY of CURVES and CURVED SURFACES, in- 

 vestigated by the Application of the Differential and Integral Calculus, with folding plate, 8vo. 

 cl., with auto, of F. J. Jervis-Smith, pr., F.R.S., 5s Univ. Press, ibidem, 1830 



Designed as a continuation to the ' Elements of Curves ', and ' Short Treatise '. 



13567 [ ] The ELEMENTS of CURVES : comprising, I. the Geometrical Principles of the Conic 



Sections, II. an Introduction to the Algebraic Theory of Curves, with 7 folding plates, 8vo. boards, 

 uncut, 5s Clarendon Press, ib., 1828 



Professor Baden Powell's first published work, issued soon after his appointment to the Savilian chair of geometry at 

 Oxford, which he held till his death. 



13568 GENERAL and ELEMENTARY VIEW of the UNDULATORY THEORY, as applied to the 



DISPERSION of LIGHT, and some other Subjects, with coloured folding front., 8vo. hf. calf, or, 

 boards, uncut, Is Gd 1841 



The author was the discoverer of ' Powell's Bands ', which are noticeable in some cases of interference. 



13569 HISTORY of NATURAL PHILOSOPHY, from the earliest Periods, with vignette by Finden 



after Corbould, fcap. 8vo. cl., 3s Gd 1824 



13570 ANOTHER COPY, prize calf extra, 6s Gd 



This was the prize copy from University College, London, to LORD LISTER, and is signed by Prof. Richard Potter. 



13571 On a NEW CASE of the INTERFERENCE of LIGHT, with 5 diagrams, 4to. (pp. 14), sewn, 



3s Gd 1848 



13572 ANOTHER COPY, with special Title, and author's inscr. to L. A. Cauchy, 4s Gd 



This memoir contains the discovery of a curious phenomenon of the interference of light, known as ' Powell's Bands.' 

 A complete explanation of it was given by Sir G. G. Stokes, F.R.S., in the same year. 



13573 On the REPULSIVE POWER of HEAT, roy. 4to. (pp. 5), sewn, 2s 1834 



13574 [ ] SHORT TREATISE on the PRINCIPLES of the DIFFERENTIAL and INTEGRAL CALCULUS, 



with plate, 8vo. boards, uncut (scarce), IsGd Univ. Press, Oxford, 1829' 



The first Oxford textbook on the calculus in which the differential notation introduced into use at English universities, 

 by the Cambridge Analytical Society (v. No. 9245 ante) was used. 



45 * 



