242 Proceedings 



The classification made for Minnesota clays is: 

 1. Residuary Clays — 



a. — From decay of feldspaihic rocks, — unimportant, 

 b. — From residues of soluble rocks, — driftless area. 

 ' 2. Transported Clays — 



A. — Sedimentary Formations used as clays, 

 1.— Argillaceous Slates: 



Huronian slates — unimportant. 

 2.— Clay Shales: 



Ordovician shales — Southeastern Minnesota. 

 Cretaceous shales — local. 

 B.— Glacial Clays: 



1. — Glacial till — very widely distributed. 

 2. — Glacial Lake clays — many important deposits. 

 3. — Glacial stream deposits — many occurrences along 

 the Mississippi and Minnesota Rivers. 

 C. — Recent Alluvial Deposits. 



D. — Loess or Wind Deposits, — the loam clays of Red River 

 valley and other places. 

 The complete paper has been published in the American Geologist 

 for March, 1902. Vol xxix, pp. 171-177. 



Drs. Eddy and Hosmer were appointed a committee to be 

 associated with A. D. Roe in the management of the museum. 



The President and two Secretaries were appointed a mem- 

 bership committee. 



258th Meeting, March 10, 1902. 



Chemistry Lecture room, University of Minnesota. 



President Hall presiding. 



A good audience was present. 



A paper on A Study of the Relation between Animal 

 Structure and its Surroundings was read by Professor H. L. 

 Osborn of Hamline University, and illustrated by charts and 

 specimens. 



259th Meeting, April 10, 1902. 



Chemistry Lecture room. University of Minnesota. 

 President Hall in the chair. 

 Eight}^ persons present. 



Dr. F. W. Sardeson gave an illustrated lecture on The 

 History of Vertebrata from the Devonian age to Mamamalia 

 'and Man. 



