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



967 DAVY (Sir Humphrey, p.r.s.) The Bakerian Lecture on some Chemical Agencies of 

 Electeicity (Phil. Trans.), with copperplate by Basire, 4to. (pp. 56), with author's inscr. 

 (rare), £L \s 1807 



' Right HonWe C. F. Greville [author of the 'Memoirs 'J from the Author with his best resp[ects] '. — Inscr. on title. 



' In 1806 he made the important discovery [here first described^ that the combinations and decompositions by electricity 

 are referable to the law of electrical attractions and repulsions, and thus demonstrated the intimate connection between 

 electricity and chemistry'.— J?. T. Thomson, F.B.S. 



968 On a Combination of Oxymuriatic Gas and Oxygene Gas (Pliil. Trans.), 4to. (pp. 8), 



sewn. As 6d 1811 



989 Consolations in Travel ; or the Last Days of a Philosopher, first edition, 12mo. 



boards, uncut {with some 2iencil-7narks) , 5s 1830 



Edited by Dr. John Davy, Sir Humphry's brother, who states in the preface that the work ' was concluded at the very 

 moment of the invasion of the author's last illness '. 



970 Electrochemical Researches on the Decomposition of the Earths ; with Observ- 

 ations on the Metals obtained from the Alkaline Earths, and on the Amalgam procured 

 from Ammonia (Phil. Trans.), 4to. (pp. 38), sewn, with author's inscr. (i^are), 13* 6d 1808 



The first account of the author's discovery, by electrolysis, of calcium, barium, strontium, magnesium, and boron. 

 ' For Thomas Allan Esq'"e. [f.r.s., viineralogist] from the author'. — Inscr. on title. 



971 Elements of Agricultural Chemistry, first edition, with copperplates, 4to. original 



boards, uncut {bach slightly damaged), \2s Qd 1813 



972 Third Edition, unth folding plates on copper {foxed), 8vo. hf. calf Is 6d 1821 



973 Fifth Edition, with folding plates on copper, 8vo. original hf cl., uncut, 55 1836 



974 Elements of Chemical Philosophy, Part I. Vol. I [all published], first edition, with 



10 plates, 8vo. (pp. 511), original boards, uncut {name on title), 10s 6d 1812 



975 Another Copy, hf brown calf {one joint cracked), 8s 



Perhaps the first connected treatise on Physical Chemistry, as known at the date of its publication, and incorporating 

 the results of the important discoveries made by the author. Pp. 1-00 contain an interesting ' Historical View of the 

 Progress of Chemistry '. 



976 Fragmentary Remains, Literary and Scientific, Avith Sketch of his Life, and Select 



Correspondence, ed. by his Brother John, f.r.s., 8vo. cl. {scarce), Is 60? 1858 



This work is not included in the edition of his 'Collected Works', and .should be added as a supplement. 



977 On the Safety Lamp for preventing Explosions in Mines, Houses lighted by Gas, Spirit 



Warehouses, or Magazines in Ships, etc., with some RESEARCHES on Flame, copper-plate, 8vo. 

 original boards, uncut (scarce), £1. Is 1825 



Containing an account of the Davy Lamp, the author's best known invention. The above is the second edition, to 

 which are added 'additional paragraphs, containing some new facts and some practical results connected with the Safety 

 Lamp ; most of the last occurred to me during, journeys that I have made, for the purpose of introducing this invention 

 into the principal mines of Europe, in which inflammable air is ionw^.'— Advertisement. 



978 BAVY (John; m.T>.,brotherof Sir Humphry) On a GASEOUS COMPOUND of CARBONIC OxiDE and 

 Chlorine, 4to. (pp. 8), sewn, with authors inscr., Zs 1812 



979 Account of some Experiments on the Combinations of different Metals and Chlorine, 



4to. (pp. 36), sewn, 5s Qd 1812 



'For T[homas] Allan [f.r.s., mineralogist (1777-1833)] Esq'e. from his sincerely obliged friend the author.'— /riser. 

 on title. 



980 DAWSON (Commr. Llewellyn Stiles, r.n.) Memoirs of Hydrography, including brief 

 Biographies of the principal Officers who have served in H.M. Naval Surveying Service, 1750-1885 : 

 Part I : \1 50-\8^0, portraits, cr. 4to. cl., ^s Eastbourne [1883] 



981 DAY (Henry George, w.) Properties of Conic Sections proved Geometrically : Part I : 

 the Ellipse, numerous diagrams, post 8vo. cl., 2s 1868 



982 DAY (Henry Noble, d.d.) Logical Praxis, with exercises for practical application, post 8vo. 

 cl., 2s 6d New York, 1876 



983 DEALTRY (William, f.r.s. ; Archdn. of Surrey) The Principles of Fluxions, 2nd Ed., 

 enlarged, with numerous diagrams, large 8vo. boards, uncut {scarce), 10s 6c? 1816 



' a useful manual for students.'— D. N. B. 



984 DECHALES (Claude Francois Milliet, s.j.)— v. Deschales, 7)05^. 



985 DECKER (General Karl v.; hie E.) Traite Eli^mentaire d'ARTiLLERiE, traduit, avec 

 Notes et Additions relatives a I'Artillerie fran^aise, par J. RAVICHIO DE Peretsdorf et 

 A. P. F. Nancy, 8vo. hf calf {stamp on title), 3s Qd 1825 



986 DEGREMFS (Henri) Diagrammes Chimiques, ou Recueil de 360 Figures qui expliquent 

 succinctementles experiences par I'indication des Agenset des Produits a cote de rAppareil, et qui 

 rendent sensible la Theorie des Phenomenes, et representent le Jeu des Attractions par la 

 Convergence des Lignes ; loith 112 copperplates, roy. 4to. sewn, uncut, 12s 6c? 1823 



' A Monsieur de la Ville de la part de I'auteur.'— //iscr. on title. This curious work includes a chemical glossary in six 

 languages. 



987 DEIDIER (Abhe N.) L'Arithmetique des Geometres, ou Nouveaux El^mens de Math6- 

 niatiques : La Science des Geometres, ou la Theorie et la Pratique de la Geometric — 2 vols. 4to., 

 ivith plates ; contemporary calf gilt, with bookplate of Edward \2th Duke of Norfolk, 12s Qd 1839 



988 La Meciianique Gi^nerale contenant la Statique, I'Airometrie, I'Hydrostatique, et 



I'Hydraulique ; icith numerous folding plates and vignettes, 4to. old French mottled calf gilt {fine 

 copy), with bookplate of Philip 2nd Earl Stanhope, 10s 1741 



989 La Science des Geometres, ou la Theorie et la Pratique de la Geometric ; with 



numerous folding plates, 4to. old calf, with bookplate of Edward \2th Duke of Norfolk, Is 6d 1739 



' Ses ouvrages lui assurent unei)lacedistinguee parmi les mathematiciens de son temps.' — Biogr. Gin. 



990 DEINHARDT (Kurt), and Alfred SCHLOMANN : Technical Dictionaries in Six 

 Languages; Vol.1: Machine-Elements and Tools, illustrated, post 8vo. cl., 3s 6c? (sells 5s 

 nett) 1906 



