674 HENRY SOTHERAN & CO., 140, STRAND, W.C., and 43, PICCADILLY, W. 



13480 POLENI (Giovanni Marchese ; Prof. Padua ; f.r.s.) Epistolarum Mathematicarum 

 Fasciculus ; with 10 folding plates, 4to. old calf newly rebacked {partly vater -stained), with 

 auto, of Samuel Roberts, F.R.S., 10s Qd Patavii, 1728 



The author's correspondence on astronomical, hydraulic, mathematical and physiological subjects with Manfredi, Guido 

 Grandi, Jacob Hermann, Antonio Conti, and Marinoni. 



'Bella e rara edizione . . . pregevola collezione.' — Riccordi. 'A learned and scarce work, frequently quoted in 

 consequence of a recent experiment on the pendulum and the rotation of the earth.' — Lihri Catalogue. The author's 

 statue in Padua was one of the first works of Canova. 



13481 POLLARD (J.), et A. DUDEBOUT, professeurs a VEcole du Genie Maritime: Architec- 

 ture Navale : Theorie du Navire ; with 3 folding plates, and 764 other illustrations, 4 vols, 

 roy. 8vo. hf green morocco neat, £1. 15s (p. F. 54 nett sewn) 1890-4 



CONTEXU :— I. Calcul des Elements Geometriques, des Carenes droites et inclinees, Geometrie du Navire : II. Statique 

 et Dynaniique du Navire. Roulis en Milieu calme, resistant ou non resistant : III. Dynamique du Navire. Mouvement 

 de Roulis sur Houle. Resistance des Carenes : IV. Dynamique du Navire. Mouvements rectiligne horizontal oblique et 

 curviligne. Propulsion. Vibrations des Coques des Navires a Helice. 



13482 POLLOCK (Sir Montagu Frederick Montagu-) Light and Water : a Study of Reflexion 

 and Colour in River, Lake and Sea, with 24 interesting plates from photographs, and 28 diagrams, 

 sq. Svo. cl., OS (p. 10s Qd nett) * 1903 



13483 POLONCEAU (Antoine Kemy, Inspecteur des Ponts et Chavssees) Notice sur I'Amelio- 

 RATION des Routes et Empierrements par rEmploi de Matieres d'Agr^gation, et au Moyen de 

 la Compression par des Cylindres d'un Grand Diametre et d'un Grand Poids, et sur les Conse- 

 quences de ces Perfectionnements pour la Police du Roulage ; suivie d'une Instruction sur les 

 Dimensions des Cylindres Compresseurs, etc. etc. etc. ; vnth 5 folding plates, 4to. (pp. 100), 

 sewn, 6s 6c? 1844 



The author was the first to introduce macadamising into France on a large scale. He seems to have introduced the 

 heavy roller, a doubtful improvement on McAdam's ramming process ; and also a very fierce-looking mechanical scarifier : 

 both illustrated above. 



13484 PONCELET (General Jean Victor ; de VInstitut, f.r.s.) Introduction a la Mecanique 

 Industrielle, Physique, ou Experimentale, 2*^ Edition, contenant un grand Nombre de Con- 

 siderations Nouvelies ; with "^ folding plates, 8vo. hf calf gilt, 3s Qd Metz, 1841 



13485 Another Copy, mottled calf gilt, As 



'Coriolis and Poncelet were among the first promoters of reform in the teaching of rational mechanics.' — Prof. Cajori. 



13486 Memoire sur les Roues Hydrauliques a Aubes Courbes, Mues par-Dessous.. suivi 



d'Exp^riences sur les EfFets Mecaniques de ces Roues ; nouvelle Edition, augmentee d'un Second 

 Memoire sur des Experiences en Grand Relatives h la 'Nouvelle Roue, contenant une In- 

 struction Pratique sur la Maniere de proceder a son Etablissement ; with 2 folding plates : 

 Experiences Hydrauliques sur les Lois de 1'Ecoulement de I'Eau a travers les Orifices 

 Rectangulaires Yerticaux a Grandes Dimensions, entreprises a Metz par MM. Poncelet et 

 Lesbros ; wi^ 7 folding plates — 2 vols. 4to. in 1, hf brown morocco gilt {fine copies) ; SCARCE. 

 £1. Is Metz, 1827 — Paris, Imprimerie Royale, 1832 



The first memoir contains the invention of the watei'-wheel known by the author's name, an undershot wheel with 

 curved floats, which is still the best when the fall does not exceed 6 feet. ' The principle of this wheel lies in the water 

 being received by the curved floats without any shock and finally discharged with small velocity-' The Poncelet wheel 

 utilises 60 % of the water power, against 25 % with the ordinary undershot wheel. 



13487 Recherches sur le Calcul des Series, ou Application de la Methods des Moyennes 



a la Transformation au Calcul Numerique et a la Determination des Limites du Reste des 

 Series: with plate, 4to. (pp. 88), sewn, 3s Qd 1833 



13488 Traite de Mp:canique Industrielle, exposant les Principes de Statique et de 



Dynamique, les Organes Mecaniques et les Moteurs ; with 25 folding plates, Svo. calf, 3s Qd 



Bruxelles, 1839 



13489 Deuxieme Edition, entierement corrig^e et contenant un grand Nombre de Con- 

 siderations Nouvelies ; with2^ folding plates, 3 vols, large Svo. in 1, hf. calf {wanting title of 

 V. Ill), 4s Liege, 1845 



The Traite is a Belgian reprint of the above Intrcducticm, with the addition of a number of plates. 



13490 Traite des Proprietes Projectives des Figures ; with 12 plates, 4to. seicn, uncut, 



Ss Qd 1822 



' Long one of the best-known text-books on modern geometry. By means of projection, reciprocation, and homologous 

 figures he established all the chief properties of conies and quadrics. He also treated the theory of polygons.'— 

 W. W. R. Ball. 



' He investigated in it the properties of figures Avhich remain unaltered by projection, which is not eff"ected here by 

 parallel rays of prescribed direction, as with Monge, but by centre projection.' ... To him we owe the Law of Duality as 

 a consequence of reciprocal polars.'— Pro/. Cajori. 



The work was written in 1S13 while the author was a prisoner of war in SaratoflT, with no other help than his memory. 



13491 PONTiJCOTJLANT (Philippe Gustave Doulcet Comte de) Theorie Analytique du 

 Systeme du Monde, avec les Supplements aux J^ivres II et V, 4 vols. Svo. neiv hf. brown calf 

 gilt (scarce), £1. 15s 1829-46 



Vol. IV, containing the Lunar Theory, is now very scarce. Vols. Ill and IV have never been reprinted. 



13492 Tomes I a III, avec les Supplements aux Livres II et Y, 3 vols. Svo. hf. calf gilt, I2s 



1S29-34 



13493 Les Memes, avec les Supplements, 3 vols. Svo. in 2, hf. calf {worn and soiled copy), 8s 



13494 [PONTBLffiUS [Italice PONTE] (Josephus Dionysius)] CoMETRic^ Observationes 

 habitae ab Academia Physico-mathematica Romana, Anno 1680 et 1681 ; with fine star-maps by 

 N. Billy, sm. 4to. extra boards {fine copy) ; rare, 12s Qd Romce, 1681 



One of many accounts of the comet of 1680, which from its nearness to the earth greatly terrified the people. The same 

 comet was also observed by Sir Isaac Newton, whom it enabled to demonstrate that comets as well as planets are 

 subject to the law of gravitation. Cometary astronomy, till then neglected, now entered on a new and more prolific era. 



The above account is rare and was unknown to Houzeau and Lancaster ; nor is the author mentioned by Poggendorff 

 and other bibliographers. 



