144 Miscellaneous. 



COREECTION OF NOTICE IN FEBRUAEY NUMBEE. 



SiK, — With regard to your Eeview of Dr. Buchanan's Eeporfc on 

 Connection of Soil, etc., with Phthisis, p. 80, please make the fol- 

 lowing correction : 



The information for the Geological description of the Wealden 

 Districts was in great part supplied by my colleague Mr. W. Topley, 

 F.G.S., as stated in Eeport. W. Whitakek. 



P.S. — The Map of Terling relates to Dr. Thome's Eeport, not to 

 Dr. Buchanan's, and has no connection with Phthisis. W. W. 



j^xsa:EiXjX^jL.j<T:Eious. 



Eelation between Palladium and Hydrogen. — A paper bearing 

 the above title was read at the Meeting of the Eoyal Society, on the 

 15th of January, by Thomas Graham, F.E.S., Master of the Mint. 

 After a brief reference to the facts that had induced chemists to 

 consider hydrogen to be metallic, the author reminded the Eoyal 

 Society of his previous researches on the absorption of hydrogen by 

 palladium, which metal " occludes " 980 volumes of the gas. This 

 absorption is accompanied by an actual expansion of the metal to a 

 greater extent than if heated to redness. Thus, a wire of palladium 

 609-14 millimetres long was expanded by 9-77 millimetres, or 1*6 

 per cent. The density of the wire being known, it was easy to 

 calculate the sp. gr. of the occluded hydrogen, the result arrived at 

 being that the condensed gas was nearly double the density of 

 water or 1-98. Mr. Graham, therefore, considers the hydrogen to be 

 present as the metal Hydrogenutm in alloy with the palladium, and 

 this view was supported by the magnetic state of the alloy, its ten- 

 sile strength and electric conductivity. In concluding his paper, 

 Professor Graham paid a very high compliment to his Assistant 

 Mr. W. Chandler Eoberts, for his valuable co-operation. 



Award of the Wollaston Medal and Donation Fund. — At 

 the Anniversary Meeting of the Geological Society of London, 

 February 19th, 1869, the President, Pkof. T. H. Huxley, F.E.S., 

 etc., announced that the Council had decided to award the Wollaston 

 Gold Medal to Henry Clifton Sorby, Esq., P.E.S., F.G.S., etc., 

 for his researches in the structure of Eocks and Meteorites by Mi- 

 croscopic and Spectroscopic examination, and for his demonstration 

 of the laws of Slaty Cleavage. The President further announced that 

 the proceeds of the Wollaston Donation Fund had been awarded to 

 William Carruthers, Esq., F.L.S., F.G.S. , for his researches in 

 Fossil Botany. As many of Mr. Carruthers' articles have appeared 

 in the Geological Magazine, its readers will have had the oppor- 

 tunity of appreciating the value of his admirable labours in this 

 neglected field of paleeontological inquiry. 



