235 



Finally, Sir Robert Kane remarked, that Professor Oldham 

 was somewhat obscure in stating that the soils are collected 

 under his direction, to be examined by Sir Robert Kane. The 

 collection of soils is being made by direction of the Chief 

 Commissioner of Woods, upon the application of Sir Robert 

 Kane, and the specimens are obtained in the several localities 

 by the officers of the Geological Survey, as the most conve- 

 nient mode of procuring them. 



The thanks of the Academy were voted to Sir James 

 Dombrain, for his kindness in undertaking to effect the trans- 

 mission, from Dingle to Dublin, of a collection of Ogham 

 stones, presented by Mr. Hitchcock to the Museum of the 

 Academy. 



November 30th, 1848. — (Stated Meeting.) 



REV. HUMPHREY LLOYD, D. D., President, 

 in the Chair. 



The Chevalier C. C. J. Bunsen, of Berlin ; C. J. Thomsen, 

 of Copenhagen ; and P. E. Botta, of Paris ; were elected 

 Honorary Members of the Academy in the department of 

 Antiquities. 



The Rev. Dr. Robinson read a communication on the rela- 

 tion between the temperature of metallic conductors and their 

 resistance to electric currents. After referring to the re- 

 searches of Sir Humphrey Davy and others on the same sub- 

 ject, he described and exhibited the instrument used in his 

 experiments, and gave a concise sketch of the mathematical 

 investigations based on them, which led him to the following 

 conclusions. 



When a wire of platina is heated by a voltaic current, its 

 resistance to the passage of that current increases with the 



VOL. IV. u 



