76 HENRY SOTHERAN & CO., 140, STRAND, W.C, and 37, PICCADILLY, W. 



1491 GAUSS (Johann Karl Friedrich) :— Briefwechsel zwischen C. F. Gauss nnd H. C. Schuh- 

 MACHER, herausg. v. C. A. F. Peters, Bd. l-II, 2 vols. 8vo. hf. calf gilt, Qs Altona, 1860 



1492 GAUTHEY (Emiland Marie) Trait6 de la Construction des Fonts [Ouvrage posthunie, 

 publie avec des Additions considerables par N. Navier, Neveu de I'Auteur] ; with 36 folding 

 plates on copper, 3 vols. 4to. sewn, uncut (rare), £1. 55 F. Didot, 1809-13-16 



'Get ouvrage estime se vendait originaireinent 72 fr., mais comme I'edition des tomes II et III est epuisee, on le paye 

 plus cher aujourd'hui. Le troisieme volume est compose de m^moires coucernant les Cakaux de Navigation.'— z;?-itne<. 



' II attaqua la theorie ordinaire des voutes, aujourd'hui entierement rejetee ; et c'est k ses vues et aux experiences qu'il 

 fit dans la suite qu'on doit celle qui I'a remplacee.'— J3io£fr. Gen. 



1493 GAUTIER (E. J. Armand) La Chimie de la Cellule Vivante; 2® :^d. ; illustrated, postSvo. 

 sewn, \s Qd 1898 



1 194 Les ToxiNES Microbiennes et Animales ; with 20 woodcuts, roy. 8vo. hf. maroon calf 



gilt, uncut, t. e. q., \0s 1896 



1495 [GAUTIER (Hubert)] Nouvelles Conjectures sur le Globe de la Terre, oh Ton fait voir 

 de quelle Mani^re la Terre se detruit journellement, pour pouvoir changer a I'avenir de figure . . . 

 le prompt retour des Marees ... la hauteur de notre Atmosphere, par le Sieur H. G. I.D. P. 

 E. CD. R. ; with folding copperplate, large \2mo. finely bound in polished orange Levant morocco, 

 arms on sides, tooled inside borders, g. e., by Weber (choice copy), £1. bs 1721 



1496 GAY-LUSSAC (Louis Joseph) CouRS de Chimie, professe a la Faculty des Sciences, com- 

 prenant I'Histoire des Sels, la Chimie veg^tale et animale [avec Table DES MATiteRES], 2 vols. 

 8vo. sewn [scarce), 10* 6c/ 1833 



1497 Instruction sur I'Essai des Matieres d' Argent par la VoieHumide; wUh 6 large 



folding plates, 4to. sewn, uncut (scarce), 155 Impr. Royale, 1832 



' Son proc^d6 d'aualyse des monnaies d'argent par la voie de precipitation (vole humide), couronne pour ainsi dire la 

 s^rie de ses travaux d'application. Ce precede est aujourd'hui substitu6 a la coupellation dans tous les hotels de monnaie 

 de I'Europe '.—Biogr. Gen. 



1498 , et Louis Jacques, Baron TH^NARD : Recherches Physico-Chimiques faites sur la 



Pile ; sur la Preparation chimique et les Proprietes du Potassium et du Sodium ; sur la D6com- 



f position de TAcide Boracique, sur les Acides Fluorique, Muriatiqiie et Muriaiique oxigene ; sur 

 'Action chimique de la Lumifere ; sur 1' Analyse vegetale et animale, etc. etc., Edition originale ; 

 with 6 copperplates, 2 vols. 8vo. contemporary French tree-calf gilt (VERY SCARCE), £1. 105 1811 

 The most important of Gay-Lussac's larger publications. ' Davy's discoveries of potassium and sodium, by the decom- 

 posing action of the voltaic pile, stimulated Gay-Lussac and Thenard to pursue this class of researches. The results 

 appeared in their Recherches physico-chimiques. Among the most important of the discoveries announced there were a 

 purely chemical process of obtaining potassium directly, the separation of boron from boracic acid, and new and improved 

 methods of analysing compounds.' 



1499 GAYA (Louis de) Treatise of the Arms and Engines of War, of Fire-Works, Ensigns, 

 and Military Instruments, both Ancient and Modern, trans, for Publick Advantage, numerous 

 plates, 12mo. old calf {water-stained, and title soiled) ; RARE, 18*; Qd 1678 



Not noticed by Lowndes, and interesting as illustrating the Military Costume and Weapons of the XVI. and XVII. 



Centuries. 



1500 GEITLEE, (Josef B. v.) Elektromagnetische Schwingungen und Wellen; with 86 

 ivoodcuts, 8vo. sewn, 3s (p. M. 4.50) Braunschweig, 1905 



1501 GELLIBRAND (Henry, Prof Astronomy, Gresham Coll.) Epitome of Navigation, with 

 Tables of the Sun and Stars Right Ascension and Declination, of the Latitude and Longitude of 

 Places of Meridional Parts, Traverse-Table, etc., and the Logarithmical Sines and Tangents, with 

 the Logarithms of Natural Numbers from 1 to 10,000, 4th Ed., enlarged, ivith woodcuts and 

 diagrams, 16mo. old sheep, with auto. ' Tho. Hayward, Jan. 1737/8 ' on title, and MS. additions by 

 the same hand, 155 1695 



' I think there is no book of Navigation of this Volume extant, that contains so much useful matter as this Treatiso.'— 

 Preface. 



Trigonometria Britannica— v. Newton (John), post. 



1502 GEMMA Frisius (Rainer) Aritmetica Prattica Facilissima, con 1' aggiunta dell' Abbrevia- 

 mento de i Rotti Astroxomici di Giacomo Pelletario ; e del conoscere a mente le Calende . . . 

 il luoco del Sole e della Luna nel Zodiaco ; e la dimonstratione della Radice Cubica . . . del 

 latino ridotte Oratio Toscanella ; with printer's device on title and last leaf sm. 4to. fine large 

 copy in old Italian calf gilt {rare), \2s%d Venetia, J 567 



'These demonstrations of the rules for the square and cube roots Peletarius treats as a great boon to his reader: and 

 states that he was very near contenting himself with a reference to his book on occiilt properties of numb?.rs'.— /"ro/. de 

 Morgan. 



1503 [GENT (Thomas : bookseller and historian of York) :] Miscellanea Curiosa : or Entertain- 

 ments for the Ingenious of Both Sexes, containing Enigmas, Paradoxes, and Mathematical 

 Questions, Jan. 1734 to Sept. 1735 (all pub.), with plates, 6 Nos. 8vo. in \,fine copy in old calf, 

 curiously stamped sides (rare), £1. \s York, apud auctorem., 1734-5 



' Perhaps the earliest attempt to establish a serial in a country town. It only ran to six numbers. Ihe projector was 

 Edward Hauksley, a grammar school master. Gent printed and partly edited it.' — D. N. P>. 



1504 GEOGRAPHICAL SCIENCE, Manual of (Mathematical Geography, bv M. O'Brien, pr , 

 F.R.S. ; Physical Geography, by D. T. Ansted, F.R.S. ; Cartography, by J. R. Jackson, F.R.S. ; 

 Geographical Terminologv, by C. G. NiCOLAY, pr. ; etc. etc.), woodcuts and maps, 2 vols. 8vo. hf 

 calf extra, 6s Qd ' 1852-9 



A COMPLETE SET TO 1905 : 



1505 GEOLOGICAL SOCIETY of LONDON, Journal of the, complete from its beginning 

 in 1845 to May, 1905, with numerous plates, m^aps, etc., 60 vols. 8vo. hf. morocco gilt, 

 t e. g., and 2 parts, sewn (scarce), £33. 1845-1905 



