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



13739 PROPOSALS of a Method for Observing the Longitude at Sea, humbly submitted to the 

 Commissioners appointed by Act of Parliament for the Discovery of the Longitude at Sea, 4to. 

 (pp. 8), unbound (rare), 10s &d 17 1& 



* I propose that a Frame of Wood, sufficient to contain the Observer and his Instruments, be hung somewhere near thtt 

 Center of the Ship's Motion, in such a manner and with such weight added to it, as may keep it steddy to a Perpen- 



— ^icular.' 



In this problematical position the observer was to use a 6" Newtonian Reflector, and ascertain the longitude from the 

 occultations of the satellites of Jupiter and Saturn. 



13740 PROUT (William, m.d., f.r.s.) Chemistry. Meteorology, and the Functions of Digestion 

 considered with reference to Natural Theology (Bridge water Treatise), woodcuts and folding mapy 

 8vo. brown calf extra [nice copy)^ 45 W. Pickering, 1834 



13741 On the Ultimate Composition of Simple Alimentary Substances ; with Remarks 



on the Analysis of Organised Bodies in general, 2 plates^ 4to. (pp. 36), sewn, with author's 

 inscr., is 1827 



The author was the propounder of what is known as 'Prout's Law '(that the atomic weights of all elements are multiples- 

 of the atomic weight of hydrogen), ' which has proved a powerful stimulus to the exact experimental investigation of 

 atouiic weights ' {D. N. B.). 



13742 PRXJSOL (Joshua) Dreams of my Solitude on the Mysteries of the Heavens, treating, 

 amongst other Subjects, on the Causes of Motion, the Government of Comets, and the Important 

 Part assigned to these as Heralds of Life to the Worlds, and lastly, the Natural Operations 

 which have created, and are still creating, the Universe, with 10 plates, 8vo. (pp. 366), cl. {scarce), 

 10s 6d 187» 



Scientific paradoxes, published too late to be budgeted by Prof, de Morgan, ' the fruit of the author's meditations in 

 the Australian Bush, when he was thrown back in inootly pensiveness upon himself.' There are chapters on motion, heat, 

 light (which the author considers 'a property uni\ersal to matter, the same as attraction'), comets, the atmosphere, and 

 of oourse the Deluge. 



13743 PRYM (Friedrich E. ; Univ. Wiirzburg) Beweis zweier Satze der Functionentheorie, 

 4to. (pp. 16), sewn, Is 6d ' ... ^^^^^"' t^^^^^ 



13744 Zur Integration der Differentialgleichung *i-^, + t-?, = 0, 4to. (pp. 16), sewn, 



ls6d ^^" '^y ibidem 11811] 



13745 Zur Integration der gleichzeitigen Differentialgleichungen *1^* = .- t^ = t^ 



4to. (pp. 9), sewn, Is 6d ''"'^ ^^' ff, [isQq] 



13746 PR2rsrBYLL0K (E.) Mikrometrische Messungen von Doppelsternen, roy. 4to. (pp. 91), 

 sevjn, 6s (p. M. 10) Karlsriihe, 190B 



13747 Der personliche Fehler bei der Beobactitung von Sternbedeckungen ; with 3 



plates and 2 diagrams, roy. 8vo. sewn. Is Qd ibidem, 1909 



13748 Das Profil der Randpartien des Mondes ; with folding plate, roy. 8vo. sewn. 



Is M ■ ' ' ib., 1908 



1.3749 PRZYIiTTSKA (Marie) Grandeur Molkculaire a I'Etat Liquide de la Diphknylamine, 

 du Triphenylmkthane et du Chlorhydrate d' Aniline ; irith Q diagrams, roy. 8vo. (pp. 23), 

 sewn, IsQd Geneve, 1909 



13750 PSELLUS (Michael) Compendium Mathematicum, aliique Tractatus eodem pertinentes 

 [GuiL. Xylandro aliisque Interpretibus ; aceedit Frederici Commandini de Disciplinis- 

 Mathematieis brevis Dissertatio] , 12mo. old hf. vellum ifine copy) ; rare, 15s 



Lugd. Bat., ex Officind Elzeviriorum, 1647 

 a handsomely printed edition. It contains I. the author's Quadriviviuu), sive de IV Scientiis Mathematieis (A.ritli- 



metica, Musica, Astronomia et Geometria), II. Aristotle's Quaestiones Mechanica-, lit. Compendium Matheniatices, [V. 



de Sphaira Sermo, both by Francesco Maurolyco, V. Descriptio Partium Terra-, by Coni-ad Dasypodius, and VI. Typhus, 



sive de Arte Navigandi, by Willcbrord 8nellius. 



Psellus (a.d. IOL'0-IIIO) was teacher of philosophy in Constantinople, and instructor of the sons of tlie Emperor 



Constantine Ducas. Tlie above work, according to Prof, de 3Iorgan (who mistakenly stated that he lived in the Ninth 



Century), 'is a mere compendium of arithmetical terms, probably from Boethius'. 



* Le traite de musique contient une exposition des princii>es theoriques selon le systcme de Pythagore : il est re- 

 inaniuable surtout par sa clarete \"Fith<. 



13751 PUBLIC ANALYSTS (Society of). Proceedings of the, containing Chemical Papers read 

 before the Society and contributed by Members, original Articles, Correspondence, Reports of 

 Meetings, etc. etc., Vol. I (all pub.), with2 woodctds, post 8vo. cl. (VERY scarce), £1. Is 1876 



This was the only volume published of the original Proceedings, the continuation was issued from 1S77 as ' The 

 Analyst', and contains contributions by A. H. Allen, J. Campbell Brown, F.R.S. , A. W. Blyth, A. Dupre, f.r.s.* Sir T. 

 Stevenson, J. A. Wanklyn, G. VV. Wigner, W. C. Young, and others. 



13752 PUCCI (Enrico ; Univ. Rome) SuUe Formule Fondamentali della Geodesia Geoidica ; 

 v'ith 2 diagrams, 4to. (pp. 28), sewn, with author's inscr., 3* [Milano, 1886] 



13753 PUOKLE (G. Hale, St. John's Coll., Cantab. : Windermere Coll.) Elementary Treatise on 

 Conic Sections and Algebraic Geometry, third Edition [entirely rewritten and] enlarged, with 

 diagrams, post 8vo. cl., 3s (p. Is iSd) 1868 



13754 Fourth Edition [revised, with a few Additions], with diagrams, post 8vo. cl., with 



auto, of F. J. Jervis-Smith, pr., F.li.S., Ss 6d (p. 7* «rf) ' 1870 



13755 [Fifth and last Edition], with diagrams, post 8vo. cl. {o. p.). 5s 1903 



13756 PUSOHL (Carl) Das Strahlungsvermogen der Atome, als Grund der physikalischen und 

 chemischen Eigenschaften der Kiirper, 8vo. sewn, 4* 6d (p. M. 8) Wien, 1869 



An interesting contribution to molecular physics and the constitution of matter at a time wlien the atomic theory was 

 thought to be fully established. Tlie atom is here still uiiconnecti-d with ether and impervious to it. From the resulting 

 pressure of light and heat the author tries to explain the prt-ssure of gases. 



13757 PUTNAM (Thomas Milton; Uriiv. California) On the Quaternary Linear Homogeneous 

 Group and the Ternary Linear Fractional Group, roy. 4to. (pp. 48), sewti, 3.s [BaUimore, 1901] 



