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



8297 GATTEBMANN (Ludwig; Univ. Freiburg i. B.) Die PRAXIS des ORGANISCHEN CHEMIKERS, 

 3. vermehrte Auflage ; with 84 woodcuts, 8vo. cl., 2s (p. M. 6.20) Leipzig, 1898 



8298 The PRACTICAL METHODS of ORGANIC CHEMISTRY, translated by WILLIAM B. SHOBER, 



with 82 woodcuts, post 8vo. cl., 3s Qd (p. 8s Qd) New York, 1900 



8299 GATTICI (Francesco Visconte) La ZECCA ARITMETICA, nella quale con Secreto mirabile, 

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

 un Denaro, ad indovinare infalibilmente, 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. Is Venetia, 1613 



VERY BABE, and unknown to Riccardi, etc. 



8300 GAUDIN (Marc Antoine Augustin) 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 sull' ELETTRODORATURA ed ELETTROARGENTATURA dei METALLI ; with woodcuts, roy. 

 8vo. (pp. 216), sewn (scarce). 10s Qd Torino, 1845 



The most complete work then published on daguerreotypy. 



8301 , et Noel Marie Paymal LEREBOURS : DERNIERS PERFECTIONNEMENTS appprtes au 



DAGUERREOTYPE, 3 e Edition, augmentee de 1'Emploi de 1'Iodure de Brome sans Boite a lode ; 

 d'un Procede pour COLORER les EPREUVES et les fixer a Froicl ; de leur Reproduction en Cuivre, 

 et de leur Dorure par la Galvanoplastie, etc., et suivie d'une Notice sur 1'Emploi de 1'Eau Bromee, 

 par HIPPOLYTE Louis FIZEAU ; with folding plate, roy. 8vo. sewn (SCARCE), 1. Is 



apud auctorem, 1842 

 Containing the discovery of the gold-toning of daguerreotypes. 



8302 [G AUDIO (Francesco Maria, delle Scuole Pie)} DISCORSO sulP ARIA, in Risposta alia Lettera 

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



Unknown to Riccardi. 



8303 G[AUGEB (Nicolas)] La MECANIQUE du FEU, on 1'Art d'en augmenter les Effets, et d'en 

 diminuer la Defense ; I re Partie [seule parue] , contenant le TRAITE des NOUVELLES CHEMINEES, 

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

 Infolding copperplates, 12mo. old calf gilt, 10s Qd 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.' Querard. 



8304 GAUSS (Johann Karl Friedrich ; F.R.S.) FORMOLA GENERALE per determinare in un' Anno 

 qualunque Dato Giuliano, o Gregoriano il GiORNO di PASQUA, 8vo. (pp. 4), unbound, Is Qd s. I. [1810] 



8305 METHODS des MOINDRES CARRES : Memoires sur la Combinaison des Observations, 



traduits par J. BERTRAND, 8vo. sewn (scarce), Qs Qd 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. 15s 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 Theorie des Nombres 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. IT. 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., 

 with plates, 4to. cl. (SCARCE), 1. 10s Boston [Jtfow.J, 1857 



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



8308 , und Wilhelm Eduard WEBER ; F.R.S. : RESULTATE aus den BEOBACHTUNGEN des 



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

 ofE. Solly, F.R.S., 8s Qd Gottingen, 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) Intorno ad una LETTERA di C. F. GAUSS al DR. E. G. M. 



OLBERS : Memoria, roy. 4to. sewn, 3s Roma, 1884 



8310 GAUTIEB (Ferdinand) Les ALLIAGES FERRO-METALLIQUES : Fabrication, , Proprietes, 

 Emplois ; with diagram, roy. 8vo. sewn, 2s Qd St.-Etienne, 1889 



8311 GAUTIEB (Baoul; Univ. Geneva] La PREMIERE COMETE PERIODIQUE de TEMPEL, 1867 II : 

 Etude consacre"e spe"cialement aux Apparitions de 1873 et de 1879, roy. 4to. sewn, 3s Qd Gen&ve, 1888 



8312 Le SERVICE CHRONOMETRIQUE a FOBSERVATOIRE de GENEVE, avec Etude des Epreuves 



dans d'autres Observatoires pour les Chronometres de Poche, roy. 8vo. sewn, 3s Qd 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., 

 4s (p. 10s Qd) 1899 



8314 GAY-LUSSAC (Louis Joseph ; F.R.S.), et Louis Jacques Baron THtNABD: RECHERCHES 

 PHYSICO-CHIMIQUES, faites sur la Pile ; sur la Preparation chimioue et les Proprietes du Potassium 

 et du Sodium ; sur la Decomposition de PAcide Boracique, sur les Acides Fluorique, Muriatique 

 et Muriatique Oxigene* ; sur 1'Action chimique de la Lumiere ; sur 1'Analyse vegetale et animale, 

 etc. etc., edition originale ; with Q copperplates, 2 vols. 8vo. hf. bound (SCARCE), 1. Is 1811 



8315 ANOTHER COPY, sewn, uncut (fresh copy), 1. 5s 



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

 ' 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.' 



