HENRY SOTHERAN & CO., 140, STRAND, W.C, and 43, PICCADILLY, W. 687 



1.3720 PROCTOR (Richard Anthony, f.r.a.s) Transits of Venus, from the tirst observed by 

 HORROCKS in 1639 to the Transit of 2012 ; 4th Edition, with 20 plates (12 coloured), and 38 wood- 

 cuts, post 8vo. cL (o. p.). As 6d 1882 



Containing the author's reply to Sir George Airy's acrimonious attack on his paper on the transit of 1874. 



' It was due to Proctor's urgent representations that provision was made for the eiiiploynient of the method identified 

 with the nameof Halley [against Delisle's, which was advocattd by Sir George Airy], wliich had been too hastily assumetl 

 inapplicable to the Hrst of each transit-pair.'— iV;.s.s- Agnct M. CUrkf. 



13721 Treatise on the Cycloid and all Forms of Cycloidal Curves, and on the Use of such 



Curves in dealing with the Motion of Planets, Comets, etc., and of Matter projected from the 

 Sun, vnth 161 diagrams, post 8vo. d. (o. p.), 3s 6rf (p. 10* Qd) 1878 



13722 The Universe and the Coming Transits : Researches into, and New Views respecting, 



the Constitution of the Heavens, with Investigation of the Conditions of the Coming Transits 



_^ of Venus, with ^22 folding plates (4 coloured^, and 22 woodcuts, 8vo. cl. (o. p.), %s 6d (p. I65) 1874 



13723 The Universe of Stars ; Researches into and New Views respecting the Constitution 



_ of the Heavens, 2nd Edition, with 12 folding plates and 15 woodcuts, 8vo. cl., 3* 6d (p. 10s Qd) 1878 



13724 The Universe of Suns, and other Science Gleanings, ivith 11 illustrations, post 8vo. cl. 



(0. p.), lis ad (p. 7* 6rf) 1884 



' Among his many gifts that of lucid exposition was the chief, and his main work was that of popularising science as 

 a writftr and lecturer. Vet lie was no mere exponent. The highest value attaches to his researches into the rotation 

 I>priod of Mars, and to his demonstration of the existence of a resisting medium in the sun's surroundings by its effect 

 on tiie trajectory of the prominences. His grasp of higher mathematics was proved by his treatment of the Cycloid. 

 Many of his works were illustrated with maps drawn by himself with admirable clearness and accuracy.'— 7>. X. B. 



13725 , and Arthur Cowper RANYARD, F.R.A.S. : Old and New Astronomy, with 31 



plates and 472 woodcuts, large impl. 8vo. original cl. gilt, uncut, t. e. g. (SCARCE), £1. 5« 1802 



13726 Another Copy, hf. red morocco gilt, g. e., £1. 10* 



13727 The Same, hf morocco gilt (front, mounted and a number of II. slightly soiled), £1. 2s 6d 



Tlie author's vukjiuiui ojuts, 'designed to embody the studies of his life.' It is one of the most complete and reatlable 



treatises on astronomy, and from the simplicity of its treatment specially to be recommende<l to amateur astronomers. 



Proctor's scientific writings are as interesting to-day as at the time they were written, and will repay the reader's 

 attention a hundred times more than the scientific inanities ottered by the syndicated journalist of the present day. 



13728 PROELL (R.) Versuch einer graphischen Dynamik, 8vo., with Atlas, consisting of 10 

 plates, 4to.— 2 vols, buckram, 5s 6d (p. M. 8 unbound) Leipz<g, IS7A 



13729 PROTEAUX (A., Puyde-D6me) Practical Guide for the Manufac-ture of Paper and 

 Boards, with Additions by L. S. Le Normand ; translated with Notes by HoRATio Paine, m.d., 

 with Chapter on the Manufacture of Paper from Wood in the United States by Henry T. 

 Brown, with % folding plates, roy. 8vo. cl., 12^ 6rf (p. £3.) Philadelphia, 186(5 



Written with a view to introduce new methods of paper-making into the United States, where the industry was then 

 passing through a severe crisis from the scarcity of cotton after the Civil War. 



13730 PRONY (Gaspard Clair Francois Marie Riche Baron de ; de I'Institut, f.R.S.) Note 

 sur les Inflexions qu'avaient subies, apr^s un Laps de vingt Anndes, des Lignes Droites 

 tracees sur le Plan des Tetes de 1'Arche du Milieu du Pont de Louis XVI avant son 

 Decintrement ; Cons^uences relatives a la Resistance des Cimens, Formules, et Table pour le 

 Calcul des Changeniens que le Tassemeiit fait eprouver a une Voute en Arc de Cercle, Svo. 

 (pp. 19), sewn, 3* 6rf 1832 



i;i73i Note sur un Moyen de Mesurer TEffet Dynamique des Machines de Kotati<»n ; 



uith folding plate, 4to. (pp. 8), sewn (rUre), lOs 6d F. Didot [c. 1821] 



' A Monsieur Georges Rennie [k.r..s.] de la part de I'auteur.'— //i.<tc/-, on tith'. 

 This memoir contains a description of his most important invention— the Iriction-dynamometer (lefreiti-Pruiiy). 



13732 Nouveau Systeme de Barrage a Portes Tournantes et Equilibr^es autour 



d'AXES Verticaux ; with folding copperplate, 8vo. (pp. 19), sewn, 4? Qd , 1836 



13733 NouvELLE Architecture Hydraulique, contenant TArt d'ELEVER IEau au 



Moyen de diff^rentes Machines, de construire daus ce Fluide, de le diriger, et generalenient de 

 I'appliquer, de diverges Manieres aux Besoins de la Socidte ; with 55 large folding plates, 2 thick 

 vols. roy. 4to. russia extra, gold- and blind-tooled (FINE COPY), £1. 10* Firmin Didot, 1790-6 



The second volume, including 40 plates, treats exclusively of the Stkam Excine. 



'Le premier ouvrage clctneiitaire de mecaniiiue 011 ait et<- regulii-rement employe le systeme des coordonni'e< de 

 De.scartes. Les experiences de du IJuat sur les eaux courantcs ne I'avaieut conduit qu'a des formules pen sfi'-es ; Prony 

 repronant ;'i la fois celles de cet ingenieur, de Bossut et de Couplet et adoptantd'ailleurs, pour exprimer la resistance, une 

 fouctiondu second degrt'de vitesse, a v+b v^ a fourni aux hydrauliciens des regies )»ratiques qui ont ete suivies pendant plus 

 de soixante ans et qui n'ont subi depuis que des corrections, utiles sans doute, mais mo<liflant peu les resultats.'— Af. Marie. 



13734 Recueil de Cinq Tables, \\ pour faciliter et abreger les Calculs des Formules relatives 



au Mouvement des Eaux dans les Canaux decouverts et les Tuyaux de Conduite ; T. pour presenter 

 les Resultats de 107 Experiences employees pour TEtablissementdeces Formules, avec Introduction 

 et un Proced^ nouveau pour determiner trcs-exactement, sans Calculs ni Operations graphiques, et 

 dans une grande Longueur, une Suite de Points situes sur une meme Surface Horizontale ; with 

 folding plate, 4to. (pp. 59), sevn, with author's inscr. (as below), 5s 6d Imprimerie Royale, 18'25 



' a Madame la Comtesse de Rumfoi-d liommage de I'auteur.' — /w.scr. on illlc. 



' La theorie et la pratique doivent a Prony des demonstrations et des procedes qui resteront. La Lht'orie du centre de 

 percussion n'avait ete, .jusqu' a lui, presentee que d'une maniere peu satisfaisante ; il la refondit pour son coiirs a I'Ecole 

 polytechnique ; elle a ete, depuis, reduite a presque rien par les travaux A>^ Poinsot.' 



13735 [ ] Regemortes, M^moire sur les, Ingenieurs aux XVII^ et XVIII^ Siccles, 8vo. (pp. 4), 



^inbound, with inscr. ' A Monsieur Georges Rennie [C. E., F.R.S.] de lapart de I'auteur ', 2s iid s. d. 



137.S6 : Notice sur le Baron de Prony, Pair de France ^par P. de P.], 8vo. (pp. 11), t^ewn, 



\s 6d [1839] 



13737 PROVIS (John, of Truro) Tables, of the most useful Kind, to facilitate Business in several 

 Branches of the Copper Trade, never before printed, from Original Calculations, made with the 

 greatest Circumspection, 4to. contemporary hf. calf, Is 6d (p. £2. 2*) Truro, 1801 



