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



13720 PROCTOR (Richard Anthony, F.R.A.S) TRANSITS of VENUS, from the first 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.), 4s Qd 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 employment of the method identified 

 with the name of Halley [against Delisle's, which was advocated by Sir George Airy], which had been too hastily assumed 

 inapplicable to the first of each transit-pair.' Mis* Agnc* M. Clerke. 



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, with 161 diagrams, post 8vo. cl. (o. p.), 3s Qd (p. 10s 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.), Qs Qd (p. 16*) 1874 



13723 The UNIVERSE of STARS ; Researches into and New Views respecting the Constitution 



of the Heavens, 2nd Edition, with 12 folding plates and ISivoodcuts, 8vo. cl., 3s Qd (p. 10s Qd) 1878 



13724 The UNIVERSE of SUNS, and other Science Gleanings, with 11 illustrations, post 8vo. cl. 



(o. p.), 3s6rf(p. 7sQd) 1884 



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

 a writer and lecturer. Yet he was no mere exponent. The highest value attaches to his researches into the rotation 

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

 on the 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.' D. N. B. 



13725 , and Arthur Gowper 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. 5s 1892 



13726 ANOTHER COPY, hf. red morocco gilt, g. e., 1. 10s 



13727 THE SAME, hf. morocco gilt (front, mounted and a number of II. slightly soiled), 1. 2s Qd 



The author's magnum opus, ' designed to embody the studies of his life.' It is one of the most complete and readable 

 treatises on astronomy, and from the simplicity of its treatment specially to be recommended 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 offered by the syndicated journalist of the present day. 



13728 PROELL (R.) VERSUCH einer GRAPHISCHEN DYNAMIK, 8vo., with ATLAS, consisting of 10 

 plates, 4to. 2 vote, buckram, 5s Qd (p. M. 8 unbound) Leipzig, 1874 



13729 PROTEAUX (A., Puy-de-D6me) PRACTICAL GUIDE for the MANUFACTURE 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 Q folding plates, roy. 8vo. cl., 12s Qd (p. 3.) Philadelphia, 1866 



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 Glair Frai^ois Marie Riche Baron de ; deVInstitut, F.R.S.) NOTE 

 sur les INFLEXIONS qu'avaient subies, apres un Laps de vingt Annees, des LIGNES DROITES 

 tracees sur le PLAN des TETES de PARCHE du MILIEU du PONT de Louis XVI avant son 

 Decintrement ; Consequences relatives a la RESISTANCE des CIMENS, Formulas, et Table pour le 

 Calcul des Changemens que le Tassemerit fait eprouver a une Voute en Arc de Cercle, 8vo. 

 (pp. 19), sewn, 3s Qd 18S2 



13731 NOTE sur un MOYEN de MESURER TEFFET DYNAMIQUE des MACHINES de ROTATION ; 



with folding plate, 4to. (pp. 8), sewn (rare), 10s Qd F. Didot [c. 1821] 



'A Monsieur Georges Rennie [F.R.S.] de la part de 1'auteur.' Inscr. on title. 



This memoir contains a description of his most important invention the friction-dynamometer (lef rein-Pro ay). 



13732 NOUVEAU SYSTEMS de BARRAGE a PORTES TOURNANTES et EQUILIBREES autour 



d'AXES VERTICAUX ; with folding copperplate, 8vo. (pp. 19), &ewn, 4s Qd 1836 



13733 NOUVELLE ARCHITECTURE HYDRAULIQUE, contenant TART d'ELEVER I'EAU au 



Moyen de differentes Machines, de construire dans ce Fluide, de le diriger, et generalement de 

 1'appliquer, de diverges Manieres aux Besoms de la Societe ; with 55 large folding plates, 2 thick 

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



The second volume, including 40 plates, treats exclusively of the STEAM ENOINE. 



'Le premier ouvrage elementaire de mecanique on ait etc regulierement employe le systeme des coordonnee^ de 

 Descartes. Les experiences de du Buat sur les eaux courantes ne 1'avaieut conduit qu'a des formules peu su^es ; Prony 

 reprermnt a la fois celles de cet ingenieur, de Bossut et de Couplet et adoptantd'ailleurs, pour exprimer la resistance, une 

 fonctiondu second degre de vitesse, av+bv 2 a fournianxhydrauliciens des regies pratiques qui ont ete suivies pendant plus 

 desoixanteansetqui n'ontsnbidepuis que des corrections, utiles sans cloute, mais modifiant peu les res ul tats.' M. Marie. 



13734 RECUEIL de CINQ TABLES, r. pour faciliteret abreger les Calculs des Formules relatives 



au Mouvement des Eaux dans les Canaux decouverts et les Tuyaux de Conduite ; 2. pour presenter 

 les Resultats de 167 Experiences employees pour I'Etablissement de ces Formules, avec Introduction 

 et un Precede' nouveau pour determiner tres-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), sewn, with author's inscr. (as below), 5s Qd Lnprimerie Royale, 1823 



' A Madame la Comtesse de Rumford hommage de 1'auteur.' Inscr. on title. 



' La theorie et la pratique doivent a Prony de.s demonstrations efc des procedes qui resteront. La Lheorie du centre de 

 percussion n'avait ete, jusqu' a lui, presentee que d'une manure peu satisf'aisante ; il la refondit pour son cours a 1'Ecole 

 polytechnique ; elle a ete, depuis, reduit<> a presque rien par les travaux d^ Poinsot.' 



13735 [ ] REGEMORTES, Memoire sur les, Ingenieurs aux XVII^ et XVIII* Siecles, Svo. (pp. 4), 



unbound, with inscr. ' A Monsieur Georges Rennie [C. E., F.R.S.] de la part de 1'auteur', 2s Qd s.d. 



13736 : NOTICE sur le BARON de PRONY, Pair de France [par P. de P.], Svo. (pp. 11), *eivn. 



Is Qd [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 Qd (p. 2. 2s) Truro, 1801 



