Short papers on geologic subjects: Major aquifers in glacial drift near Mattoon, Illinois, by John W. Foster; Notes on the Illinois Lafayette gravel, by L. E. Lamar and R. R. Reynolds; Cambrian and lower Ordovician exposures in northern Illinois, by H. B. Willman and J.S. Templeton; An occurrence of barite in the LaSalle limestone of Illinois, by Raymond S. Shrode; Revision of Croixan Dikelocephalidae, by Gilbert O. Raasch Q Science
