Fri Mar 03 17:01:54 2000    <hobbs@SBLCJH>

	* Mixture.cpp: Fix 'abs' problem with MSVC compilation

Fri Sep  4 11:04:43 1998  Harry Melanson  <melanson@d0chb.fnal.gov>

	* Material.cpp (D0Material): 
	First implementation of Material class