122 DAV 
Davies (D. C.). A Treatise on Slate and Slate-quarrying: Scientific, 
Practical, and Commercial. 8vo. London, 1878. 
——. A Treatise on Metalliferous Minerals and Mining. 
8vo. London, 1880. 
Davies (J. Hamilton). See Smiru (J. Pye). 
Davies (Richard). ‘Tables of Specific Gravities extracted from various 
authors, with Remarks upon the same. (Tract.) 4to. London, 1750. 
Davies (T.8.). Catalogue of his valuable Mathematical and Scientific 
Library, etc. (Tract.) 8vo. London, 1851. 
Davila(P.F.). Catalogue systématiqueetraisonné des curiosités dela Nature 
et de l’Art, qui composent son Cabinet. 3 vols. 8vo. Paris, 1767. 
Davis (James W.) and Lees (F. A.). West Yorkshire: an Account of its 
Geology, Physical Geography, Climatology, and Botany. 
8vo. London, 1878. 
Davis (Joseph Barnard). The Neanderthal Skull. (Tract.) 
8vo. London, 1864. 
Davreux (C. J.). Essai sur la constitution géognostique de la province 

de Liége. (Tract.) 4to. Brussels, 1833. 
Davy (Sir Humphry). A Discourse, introductory to a Course of Lec- 
tures on Chemistry. (Tract.) 8vo. London, 1802. 
——. On the Analysis of Soils, as connected with their Improvement. 
(Tract.) 4to. London, 1805. 
Electrochemical Researches on the Decomposition of the Earths, 
etc. (Tract.) Ato. London, 1808. 
—. On some new Phenomena of Chemical Changes produced by 
Electricity, particularly the decomposition of the Fixed Alkalies, 
ete. (Tract.) Ato. London, 1808. 
——. Researches on the Oxymuriatic Acid, its Nature and Combina- 
tions ; and on the Elements of the Muriatic Acid. (Tract.) 
4to. London, 1810. 
——. On a combination of Oxymuriatic Gas and Oxygene Gas. 
(Tract.) Ato. London, 1811. 
——. On some Combinations of Phosphorus and Sulphur, ete. (Tract.) 
Ato. London, 1812. 
——. Some Experiments and Observations on the Substances produced 
in different Chemical processes on Fluor Spar... (Tract.) 
4to. London, 1813. 
——. Some further Observations on a new Detonating Substance. 
(Tract.) Ato. London, 1813. 
——. On the Safety-lamp for Coal-miners ; with some researches on 
flame. | 8vo. London, 1818. 
Six Discourses delivered before the Royal Society at their Anni- 
versary Meetings, etc. (Tract.) Ato. London, 1827. 
Charge brought against him by C. Babbage. See BABBAGE 
(Charles) and Davy (John). , 
Davy (John). The West Indies before and since Slave Emancipation, 
comprising the Windward and Leeward Islands’ military command. 
8vo. London, 1854. 
——. Did Sir Humphry Davy promise to nominate Mr. Babbage as 
the Secretary of the Royal Society in November, 1826? (Tract.) _ 
8vo. London, 1865. 



