<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the 
Condensed Consolidated Balance Sheet at September 30, 1998, (Unaudited) 
and the Condensed Consolidated Statement of Operations for the three 
and nine months ended September 30, 1998, (Unaudited) and is qualified in its 
entirety by reference to such financial statements.
</LEGEND>
       
                              
<PERIOD-TYPE>                    9-MOS
<FISCAL-YEAR-END>                           DEC-31-1998
<PERIOD-START>                              JAN-01-1998
<PERIOD-END>                                SEP-30-1998
<CASH>                                       34,515,012
<SECURITIES>                                          0
<RECEIVABLES>                                39,858,760
<ALLOWANCES>                                  1,593,416
<INVENTORY>                                  51,699,130
<CURRENT-ASSETS>                            129,273,929
<PP&E>                                      101,608,776
<DEPRECIATION>                               48,146,143
<TOTAL-ASSETS>                              186,265,368
<CURRENT-LIABILITIES>                        29,471,228
<BONDS>                                       2,700,000
<PREFERRED-MANDATORY>                                 0
<PREFERRED>                                           0
<COMMON>                                     33,607,488
<OTHER-SE>                                  119,871,479
<TOTAL-LIABILITY-AND-EQUITY>                186,265,368
<SALES>                                     207,248,839
<TOTAL-REVENUES>                            207,248,839
<CGS>                                       126,114,476
<TOTAL-COSTS>                               126,114,476
<OTHER-EXPENSES>                             42,790,113
<LOSS-PROVISION>                                      0
<INTEREST-EXPENSE>                                    0<F1>
<INCOME-PRETAX>                              38,897,704
<INCOME-TAX>                                 15,628,000
<INCOME-CONTINUING>                          23,269,704
<DISCONTINUED>                                        0
<EXTRAORDINARY>                                       0
<CHANGES>                                             0
<NET-INCOME>                                 23,269,704
<EPS-PRIMARY>                                      2.01
<EPS-DILUTED>                                      1.93
<FN>
<F1>Interest income for the nine months ended September 30, 1998, 
was $553,454.
</FN>