<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the 
Condensed Consolidated Balance Sheet at June 30, 1998, (Unaudited) 
and the Condensed Consolidated Statement of Operations for the three 
and six months ended June 30, 1998, (Unaudited) and is qualified in its 
entirety by reference to such financial statements.
</LEGEND>
       
                              
<PERIOD-TYPE>                    6-MOS
<FISCAL-YEAR-END>                           DEC-31-1998
<PERIOD-START>                              JAN-01-1998
<PERIOD-END>                                JUN-30-1998
<CASH>                                       20,624,535
<SECURITIES>                                          0
<RECEIVABLES>                                43,707,675
<ALLOWANCES>                                  1,823,216
<INVENTORY>                                  55,150,127
<CURRENT-ASSETS>                            122,950,507
<PP&E>                                       97,242,374
<DEPRECIATION>                               46,182,977
<TOTAL-ASSETS>                              177,614,624
<CURRENT-LIABILITIES>                        30,146,099
<BONDS>                                               0
<PREFERRED-MANDATORY>                                 0
<PREFERRED>                                           0
<COMMON>                                     33,519,125
<OTHER-SE>                                  110,543,567
<TOTAL-LIABILITY-AND-EQUITY>                177,614,624
<SALES>                                     130,041,019
<TOTAL-REVENUES>                            130,041,019
<CGS>                                        79,089,853
<TOTAL-COSTS>                                79,089,853
<OTHER-EXPENSES>                             27,636,877
<LOSS-PROVISION>                                      0
<INTEREST-EXPENSE>                                    0<F1>
<INCOME-PRETAX>                              23,635,243
<INCOME-TAX>                                  9,601,000
<INCOME-CONTINUING>                          14,034,243
<DISCONTINUED>                                        0
<EXTRAORDINARY>                                       0
<CHANGES>                                             0
<NET-INCOME>                                 14,034,243
<EPS-PRIMARY>                                      1.22
<EPS-DILUTED>                                      1.16
<FN>
<F1>Interest income for the six months ended June 30, 1998, 
was $320,954.
</FN>