688 HENRY SOTHERAX & 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 6d 1719 



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

 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- 

 dicular.' 



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

 occultations of the satellites of Jupiter and Saturn. 



13740 PB.OUT (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 map, 

 Svo. 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, ivith author's 

 znscr., 45 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 

 atomic weights ' (D. N. !>.). 



13742 PRTJSOL (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, Svo. (pp. 366), cl. (scarce), 

 10* Gd 1879 



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 moody pensiveness upon himself.' There are chapters on motion, heat, 

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

 of rourse the Deluge. 



13743 PBYM (Friedrich E. ; Univ. Wiirzburg) BEWEIS zweier SATZE der FUNCTIONENTHEORIE, 

 4to. (pp. 16), sewn, Is 6d Berlin [1869] 



13744 - . Zur INTEGRATION der DIFFERENTIALGLEICHUNG -? -f < \~, =" 0, 4to. (pp. 16), sewn, 

 IsQd 8a ? <y- ibidem [1871] 



13745 - Zur INTEGRATION der gleich zeitigen DIFFERENTI ALGLEICHUNGEN ^ = ^ -- = ^ 

 4to. (pp. 9), sewn, Is Gd y ' 



13746 PRZYBYLLOK (E.) MlKROMETRISCHE MESSUNGEN VOn DOPPELSTERNEN, roy. 4to. (pp. 91), 

 sewn, 6s (p. M. 10) Karlsruhe, 1908 



13747 -- Der PERSONLICHE FEHLER bei der BEOBACHTUNG von STERNBEDECKUNGEN ; with 3 

 plates and "2 diagrams, roy. Svo. sewn, \s Gd ibidem, 1909 



13748 - Das PROFIL der RANDPARTIEN des MONDES ; with folding plate, roy. Svo. sewn, 

 Is 6c? ib., 1908 



13740 PBZYLUSKA (Marie) GRANDEUR MOLECULAIRE a FETAT LIQUIDE de la DIPHENYLAMINE, 

 du TRIPHENYLMETHANE et du CHLORHYDRATE d' ANILINE ; with 6 diagrams, roy. Svo. (pp. 23), 

 sewn. Is Gd Geneve, 1909 



13750 PSELLTJS (Michael) COMPENDIUM MATHEMATICUM, aliique Tractatus eodem pertinentes 

 [GuiL. XYLANDRO aliisque Interpretibus ; accedit FREDERICI COMMANDINI de Disciplini* 

 Mathematicis brevis Dissertatio] , 12mo. old hf. vellum (fine copy] ; rare, 15s 



Lugd. Bat., ex Officinti Elzeviriorum, 1647 

 A handsomely printed edition. It contains I. the author's Quadrivivium, sive de IV Scientiis Matliematicis (Arith- 



metica, Musica, Astronomia et Geometria;, II. Aristotle's Quaestiones Mechanics, III. Compendium Mathematics*, [V. 



de Sphtera Sermo, both by Francesco Maurolyco, V. Descriptio Partium Terne, by Conrad Dasypodius, and VI. Typhus, 



Mve de Arte Navigandi, by Willebrord Snellius. 



Psellus (A.D. 1020-1110) was teacher of philosophy in Constantinople, and instructor of the sons of the Emperor 



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



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



' Le traite do musique contient une exposition des principes theoriques selon le systetne de Pythagore : il est re- 



marqnable surtout par sa clarete '. Felis. 



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.), with 2 woodcuts, post Svo. cl. (VERY SCARCE), 1. L<? 1876 



This was the only volume published of the original Proceedings, the continuation was issued from 1ST" as ' Th 

 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. Winner, W. C. Young, and others. 



13752 PTJCCI (Enrico ; Univ. Rome) Sulle FORMULE FONDAMENTALI della GEODESIA GEOIDICA ; 

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



13753 PTJCKLE (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 Svo. cl., 3s (p. Is tid) 1868 



13754 - FOURTH EDITION [revised, with a few Additions], with diagrams, post Svo. cl., with 

 auto, of F. J. Jervis-Smith, pr., F.li.S., 3s 6d (p. Is (id) 



13755 - [FIFTH AND LAST EDITION], with diagrams, post 8vo. d. (o. p.), 5s 



13756 PUSCHL (Carl) Das STRAHLUNGSVERMOGEN der ATOME, als Grand der physikalischen und 

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



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

 thought to be fully established. The atom is here still unconnected with ether and impervious to it. From the resulting 

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



13757 PUTNAM i Thomas Milton; Univ. California) On the QUATERNARY LINEAR HOMOGENEOUS 

 GROUP and the TERNARY LINEAR FRACTIONAL GROUP, roy. 4to. (pp. 48), sewn, 3s [Baltimore, 1901] 



