HENRY SOTHEKAN & CO., 140, STRAND, W.C, AND 43, PICCADILLY, W. 423 



8297 GATTERMANN (Ludwig; Uyiiv. Freiburg i. B.) Die Praxis des Organischen Chemikers, 

 3. vermehrte Aufiage ; with 84 woodcuts, 8vo. c/., 2* (p. M. 6.20) Leipzig, 1898 



8298 The Practical Methods of Organic Chemistry, translated by William B. Shober, 



with 82 woodcuts, post 8vo. cL, 3* Qd (p. 8* 6rf) New York, 1900 



8299 GATTICI (Francesco Visconte) La Zecca Aritmetica, nella quale con Secrete mirabile, 

 et artificioso, e con Facilita ^randissima s'insegna per Mezzo de Numeri cavandosi alcuno di Borsa 

 un Denaro, ad indovinare inialibilniente, di che Valsuta, di che Metallo, di che Stampa, e Signore 

 sia cotal danaro, ecc. ; with device on title, folio, sewn (partly water-stained), £1. l5 Venetia, 1613 



Vkrv rark, and unknown to Riccardi, etc. 



8300 GAXJDIN (Marc Antoine Au^stin) Trattato Pratico di Fotografia, Esposizione 

 compiuta dei Processi relativi al Dagherotipo, ecc. ; Versione dal francese di C. J., con 

 Appendice del Traduttore, NOTiziE e Cenni su Diversi Stromenti Fisici, ed una Lezione 

 Pratica suir Elettrodoratura ed Elettroargentatura dei Metalli ; with woodcuts, roy. 

 8vo. (pp. 216), sewn {scarce), \0s &d Torino, 1845 



The most complete work thfn published on daguerreotypy. 



8301 , et Noel Marie Paymal LEBEBGUKS : Derniers Perfectionnements apport^s au 



Daguerreotype, 3<^ Edition, augmentee de I'Emploi de I'lodure de Brome sans Boite t\ lode ; 

 d'un Procc^de pour COLORER les Epreuves et les hxer k Froid ; de leur Reproduction en Cuivre, 

 et de leur Dorure par la Galvanoplastie, etc., et suivie d'une Notice sur I'Emploi de I'Eau Bromee, 

 par HiPPOLYTE Louis Fizeau ; loith folding plate, roy. 8vo. sewn (scarce), £1. 1* 



apud auctorem, 1842 

 Containing the discovery of the gold-toning of daguerreotypes. 



8302 [G AUDIO (Francesco Maria, delle Scuole Pie)] DiscoRSO suU' Aria, in Risposta alia Lettera 

 Ottava di Atana^do Cavalli, 8vo. (pp. 58), sewn, 5s Roma, 1735 



Unknown to Riccardi. 



8303 G [AUGER (Nicolas)] La Mecanique du Feu, ou I'Art d'en augmenter les Effets, et d'en 

 diminuer la Depense ; l^^ Partie [seule parue] , contenant le Traite des Nouvelles Cheminees, 

 qui dchauttent plus que les Cheminees ordinaires, et qui ne sont point sujettes a fumer, etc. ; with 

 \2 folding copperplates, 12mo. old calf gilt, \0s 6d 1713 



First edition of one of the earliest works on the technics of ventilation and heating, which laid the .scientific basis of 

 that science. ' Ouvrage dans lequel on trouve une grande partie des inventions en ce genre, qu'on a depuis donnees 

 comme nouvelles.'— Queran/. 



8304 GAUSS (Johann Karl Friedrich ; f.r.s.) Formola Generale per determinare in un' Anno 

 qualunque Dato Giuliano, o Gregoriano il GlORNO di Pasqua, 8vo. (pp. 4), unbound, ls6d s. I. [1810] 



8305 Methode des Moindres Carres : Meraoires sur la Combinaison des Observations, 



traduits par J. Bertrand, 8vo. sewn {scarce), 6s 6d 1855 



a collection of all the author's various papers treating on the method of least squares, which would be otherwise 

 difficult to obtain. 



8306 Recherches Arithmetiques, traduites par A. C. M. Poullet-Delisle, thick 4to. sewn, 



uncut (SCARCE), £1. 155 1807 



'His most celebrated work in pure mathematics, which has proved a starting point for several valuable investigations 

 on the theory of numbers. This treatise and Legendre's TTieorie des Norribres remain standard works on the theory of 

 numbers ... In particular it introduced the modern theory of congruences of the first and second orders, and to this 

 Gauss reduced indeterminate analysis. In it also he discussed the solution of binomial equations of the form x'» = 1,' 

 etc. etc. etc.— ir. w. R. Ball. 



8307 Theory of the Motion of the Heavenly Bodies moving about the Sun in Conic 



Sections, translated, with Appendix (pp. 50), by Rear-Adml. Charles Henry Davis, u.s.n., 

 toith plates, 4to. cl. (scarce), £1. 10* Boston [Mass.], 1857 



The only English tran.slation of this classic work, which introduced the principle of curvilinear triangulation. 



8308 , iind Wilhelm Eduard WEBEB ; f.r.s. : Resultate aus den Beobachtungen des 



MAGNETISCHEN Vereins im Jahre 1836 ; with 10 folding plates and charts, 8vo. boards, unth auto. 

 ofE. Solly, F.R.S., 8* 6c? Gbtthigen, 1837 



Gauss and Weber erected the first electro-magnetic telegraph in Germany in 1833 by connecting the astronomical 

 observatory with the meteorological station. 



8309 ; Boncompagni (Badassare) Intomo ad una Lettera di C. F. Gauss al Dr. E. G. M. 



Olbers : Memoria, roy. 4to. sewn, 3« Roma, 1884 



8310 GAUTIEB (Ferdinand) Les Alliages Ferro-M6talliques : Fabrication, . Propri^t^s, 

 Emplois ; with diagram^ roy. 8vo. sewn, 2s 6d St.-Etienney 1889 



8311 GAUTIER (Raoul; Univ. Geneva) La Premiere CoMfcTE P6riodique de Tempel, 1867 II : 

 Etude con8acr(5e sp^ialement aux Apparitions de 1873 et de 1879, roy. 4to. sewn,^6d Geneve, 1888 



8312 Le Service Chronometrique h. I'Observatoire de Geneve, avec Etude des Epreuves 



dans d'autres Observatoires pour les Chronomdtres de Poche, roy. 8vo. sewn, 3* 6rf ib., 1894 



8313 GAY (Albert, m.i e.e), and C. H. TEAMAN, a.i.e.e. : Introduction to the Study of 

 Central Station Electricity Supply, with 199 woodcuts {including many plates), cr. 8vo. cl., 

 As (p. 105 6cO , 1899 



8314 GAY-LUSSAC (Louis Joseph ; f.r.s.), et Louis Jacques Baron THENARD: Recherches 

 Physico-Chimiques, faites sur la Pile ; sur la Preparation chiminue et les Propridt^s du Potassium 

 et du Sodium ; sur la Decomposition de I'Acide Boracique, sur les Acides Fluorique, Muriatique 

 et Muriatique Oxig(^n^ ; sur 1 Action chimique de la Lumiere ; sur I'Analyse vegetale et aniniale, 

 etc. etc., edition originale ; with 6 copperplates, 2 vols. 8vo. hf bound (scarce), £1. \s 1811 



8315 Another Copy, sewn, uncut {fresh copy), £\.bs 



The most important of Guy-Lassac's larger publications, which did much to improve the methods of organic analy.sis. 

 ' Davy's discoveries of potassium and sodium, by the decomposing 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.' 



