PROCEEDINGS OF THE MEETING. XXXV 



Electro-chemistry and Electro-maguetism, so far as regards the 

 experimental part of the subject. 



6. The Committee recommended the researches commenced 

 by Sir David Brewster into the Optical properties of Minerals to 

 the attention of chemists. 



Committee for Geology and Geography, 



The Committee reported the foUovring Recommendations : 



1. That Mr. Stevenson be requested to complete the Report 

 of the relative level of land and sea, and on the waste and exten- 

 sion of the land, which he has presented to this Meeting. 



2. That with a view to perfect our knowledge of the Fossil 

 Ichthyology of the British islands, a sum not exceeding 105 Z. be 

 paid by the Treasurer to Dr. Buckland, Prof. Sedgwick, and 

 Mr. Murchison, to be applied for the purpose of assisting 

 M. Agassiz in carrying on his Ichthyological work. 



3. That the recommendations relating to the veins and sections 

 of Flintshire, the heaves of Cornwall, the quantity of mud and 

 silt, the experiments of Mr. G. Watt, and the desiderata noticed 

 by Mr. John Taylor and Mr. Conybeare, and the sixth and tenth 

 queries, be repeated. 



4. That a sum not exceeding 20/. be placed at the disposal of 

 Mr. J. Yates and Mr. G. Rennie, for the purpose of the experi- 

 ments on the quantity of mud and silt in rivers. 



5. That evidence should be collected as to the direction and 

 probable sources from which drifted blocks and pebbles, referri- 

 ble to rocks not existing in the neighbourhood where they now 

 occur, whether in insulated masses, or in beds of superficial gra- 

 vel, may have been derived*. 



6. That evidence should be collected as to the form and direc- 

 tion of hills or ridges of superficial gravel, and the sources whence 

 the materials of such gravel hills may have been transported to 

 their present place. 



7. That observations should be made on the direction and depth 

 of grooves and hollows, such as are often found on the faces of 

 hard rocks and beneath superficial deposits of drifted clay and 

 gravel not referrible to the action of any existing currents. 



8. The Committee further reported that it appeared to them 

 that the advancement of various branches of science is greatly 

 retarded by the want of an accurate map of the whole of the 

 British Islands : — that it be recommended to the Council to con- 

 sider of the propriety of representing this opinion to His Ma- 



• The Assistant-Secretary has forwarded to persons known to possess infor- 

 mation on these subjects a circular, of which copies may be had on application 

 to him. 



