PAPERS PRESENTED AT REGULAR MEETINGS. 
January 12 , 1900 . 
"The Red Sandstone of the Diablo Mountain, Texas,” Edwin T. Dum- 
ble, Houston, Texas. 
"Outline Geology of West Maryland,” A. C. McLaughlin, Galveston, 
Texas. 
"Note on Prismoidal Formulae,” W. H. Echols, Professor of Mathe- 
matics, University of Virginia. Presented by Professor T. U. Taylor. 
"Monogamous Marriage,” Dr. S. E. Mezes, University of Texas, Aus- 
tin, Texas. 
February 16 , 1900 . 
"Astronomy in the XIX. Century,” Dr. FI. Y. Benedict, University of 
Texas, Austin, Texas. 
"An Elementary Account of the Greater Problems Solved by the Mod- 
ern Group Theory,” Dr. L. E. Dickson, University of Texas, Austin, 
Texas. 
"The Possibilities of Lake McDonald,” Professor T. U. Taylor, Uni- 
versity of Texas, Austin, Texas. 
March 26 , 1900 . 
"Floating Sand and Floating Stones” (announced by title), Professor 
Frederic W. Simonds, University of Texas, Austin, Texas. 
April 28 , 1900 . 
"The Failure of the Austin Dam,” Professor T. U. Taylor, University 
of Texas, Austin, Texas. 
"A Consideration of the Interpretation of Unusual Events in Geolog- 
ical Records,” Professor Frederic W. Simonds, University of Texas, Aus- 
tin, Texas. 
Formal Meeting — June 18 , 1900 . 
"The Nature of Justice,” Dr. S. E. Mezes, University of Texas, Aus- 
tin, Texas. 
"The Development of the Present Texas Railway System,” R. A. 
Thompson, M. A., Engineer to the State Railroad Commission, Austin, 
Texas. 
"'Mind and Brain,” Dr. Edmund Montgomery, Hempstead, Texas. 
