Geology and Geography. 391 



Mr Murchison stated, that he had discovered fossi fishes in 

 the old red sandstone of the district which he has lately exa- 

 mined, which Mr Agassiz has declared to be identical with the 

 ichthyolites of Caithness. Mr M. is of opinion that the Silu- 

 rian system of rocks exists to a very considerable extent in Nor- 

 way. 



Some very interesting observations on the transition series 

 were made by Mr Greenough and Professor Phillips. 



Dr Daubeny requested the co-operation of the Section, in 

 furthering his inquiries into the nature and phenomena of mi- 

 neral waters: 



16. Dr Jacob read a notice regarding some fossil madrepores 

 from the Queen's County. 



17. Professor Phillips made a communication regarding the 

 occurrence of a tertiary deposit on the coast of the north of 

 England, near Burlington. 



18. Professor Sedgwick read a letter from Mr Lyell on the 

 fossils of the Crag. 



Monday, 10th August. 



Section C Chemistry and Mineralogy. 



President. — Dr Thomas Thomson. 

 Vice-Presidents. — Dr Dalton and Dr Barker. 

 Secretaries Dr Afjohn and Mr Johnston. 



Committee. — Mr Davy, Mr Vernon Harcourt, Dr Daubeny, Mr Graham, Mr 

 Connell, Dr R. D. Thomson, Mr Kane, Mr Ferguson, Mr Scanlan, Dr 

 Geoghegan, &c. 



The Secretary presented to the Section printed copies of ta- 

 bles, exhibiting at a single view the most important properties 

 of simple and compound bodies, for defraying the expenses of 

 the printing of which L. 10 had been allocated at the last meet- 

 ing of the Association. 



1. A paper was then read by Mr Davy, upon the subject of 

 the corrosion of iron by sea water. The observations had par- 

 ticular reference to the injury sustained by the iron of buoys 



