<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> JUL-31-1998 <PERIOD-END> JAN-31-1998 <CASH> 6,049,000 <SECURITIES> 1,553,000 <RECEIVABLES> 23,770,000 <ALLOWANCES> 441,000 <INVENTORY> 11,200,000 <CURRENT-ASSETS> 48,317,000 <PP&E> 114,060,000 <DEPRECIATION> 59,856,000 <TOTAL-ASSETS> 113,236,000 <CURRENT-LIABILITIES> 16,454,000 <BONDS> 17,052,000 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 724,000 <OTHER-SE> 74,358,000 <TOTAL-LIABILITY-AND-EQUITY> 113,236,000 <SALES> 80,661,000 <TOTAL-REVENUES> 80,661,000 <CGS> 55,467,000 <TOTAL-COSTS> 55,467,000 <OTHER-EXPENSES> 21,729,000 <LOSS-PROVISION> 180,000 <INTEREST-EXPENSE> 801,000 <INCOME-PRETAX> 2,484,000 <INCOME-TAX> 708,000 <INCOME-CONTINUING> 1,776,000 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 1,776,000 <EPS-PRIMARY> 0.28 <EPS-DILUTED> 0.28