CONT E N T S 

 OF THE SIXTY-THIRD VOLUME. 



(JN two new Species of Narcissus Page 7 



On the irregular Indications of Thermometers. By J. Hera- 

 path, Esq 8 



On the apparent Magnetism of Metallic Titanium. By 

 William Hyde Wollaston, M.D. V.P.R.S. . . 15 



Chemical Examination of a Fragment of a Meteor which fell in 

 Maine y August 1823. By John W. Webster, M.D.M.G.S. 

 Lond. Sfc . 16 



A new Theory of Telescopes founded on rational Principles and 

 interesting Experiments. By J. Reade, M.D. . . 20 



Description of certain Gangues of Spinelle brought from the 

 Island of Ceylon by M. Leschenault de Latour. By M. le 

 Comte de Bournon, Chev. de St. Louis, F.R.S. fyc. . 30 



Description of an improved Gauge for ascertaining with Pre- 

 cision the Pressure of highly compressed. Steam, Gases, and 

 Fluid Bodies. By Mr. Samuel Seaward ... 36 



Description of some new Cacti and Mammillariae, recently 

 brought from Mexico by Mr. Bullock of the Egyptian Hall, 

 Piccadilly : and now preserved, with many other veiy rare 

 Plants, in the Nursery of Mr. Tate, in Sloane-street. By 

 A. H. Haworth, Esq. F.L.S. i}c 40 



An Account of the Effect of Mercurial Vapours on the Crew of 

 His Majesty's Ship Triumph in the Year 1810. By William 

 Burnett, M.D., one of the Medical Commissioners of the 

 Navy, formerly Physician and Inspector of Hospitals to the 

 Mediterranean Fleet 42 



Account of a Work entitled " Storia de' Fenomeni del Vesuvio 

 avvenuti negli anni 1821, 1822, e parte del 1823," etc. 

 " History of the Phcenomena of Vesuvius during the Years 

 1821, 1822, and Part of 1823 ; accompanied with Obser- 

 vations and Experiments. By J. Monticelli, Perpetual 

 Secretary of the Royal Academy of Sciences of Naples; and 

 N. Covelli, of the Royal Institute of Encouragement." By 

 M. Menard de la Groye 46 



Vol. 63. No. 314. June 1824. a 



