\message{Using HAGGERTY's MYPSIZZL TEX}% \memohead{\bf BNL E-787 MEMO}% \memofrom{John Haggerty}% \letterfrom{John S. Haggerty}{}{}% \salutation{Dear}% \closing{Sincerely,}% \letterhead{% \fourteenrm{Brookhaven National Laboratory}\cr }{% }{% Building 510A\cr Upton, New York 11973\cr (516) 282-7894\cr }{% }% \def\nextline{\unskip\nobreak\hskip\parfillskip\break} \institute{% Lawrence Berkeley Laboratory and Department of Physics\breaktitle University of California, Berkeley, California 94720\breaktitle Stanford Linear Accelerator Center\breaktitle Stanford University, Stanford, California 94305\breaktitle Department of Physics\breaktitle Harvard University, Cambridge, Massachusetts 02138\breaktitle }% % \contract{% This work was supported in part by the Department of Energy, contracts DE-AC03-76SF00515 (SLAC), DE-AC03-76F00098 (LBL), and DE-AC02-76ER03064 (Harvard). }%