466 /RECORDS. 



STATED MEETING. 



March 21, 1898. 



President Osborn In the chair. Minutes of meeting of Feb- 

 ruary were read and approved. Secretary read the following 

 paper by title : 



The Physiology of Secretion, by Albert P. Mathews. 

 Section of Geology and Mineralogy then formed. 



Richard E. Dodge, 



Secretary, 



SECTION OF GEOLOGY AND MINERALOGY. 



March 21, 1898. 



Professor Kemp in the chair. Thirty-four members present. 

 Minutes of the last meeting were read and approved. Secretary 

 read a letter from the Secretary of the Scientific Alliance in 

 reference to the Newberry grant for paleontology or zoology. 



The paper of the evening, illustrated by lantern, was by Dr. 

 Heinrich Ries, entitled The Clay and Kaolin Deposits of 

 Europe. Dr. Ries sketched briefly the geographical distribu- 

 tion of the Kaolin deposits, and their relation and comparison to 

 similar deposits of America. He then gave special attention to 

 the deposits of Great Britain, Belgium, Denmark, Germany and 

 Austria, and mentioned briefly those found in other regions 

 He described particularly the deposits of Cornwall, which are 

 found in association with veins of Tin and Granite in regions 

 where it is supposed that the Feldspar has been changed to Kaolin 

 through the influence of fluoric fumes rising from below. These 

 products are very pure, containing g7 Yzfo of clay substance. He 

 also spoke of the ball plastic clays found in southwestern Eng- 

 land, which occur in lenses in large beds of sand, and are used 

 to mix with non-plastic kaolins. Refractory clays are found in 

 England and Scotland in the Carboniferous rocks, and are worked 

 by underground mining. Impure clays, used for bricks, are par- 

 ticularly found in the vicinity of London. The Staffordshire 



